Archives
Source: gov.uk (2025-04-28)

This publication is intended for Valuation Officers. It may contain links to internal resources that are not available through this version.

1. Scope

This section applies to all archives but is principally concerned with the valuation of purpose built facilities with specialist elements for the preservation of documents and other collections. Care should be taken when considering properties described by their occupiers as archives, as this is a generic term.

2. List description and special category code

3. Responsible teams

This is a specialist class and responsibility for valuation will lie with the specialist teams within each business unit. Queries of a complex nature arising from the valuation of individual properties should be referred to the NVU class facilitator via the class co-ordination team (CCT).

4. Co-ordination

The Heritage Class Co-ordination Team and the Civic Valuation Panel have responsibility for this class ensuring effective co-ordination across the Specialist Teams. The team are responsible for the approach to and accuracy and consistency of archive valuations. The team will deliver Practice Notes describing the valuation basis for revaluation and provide advice as necessary during the life of the rating list. Caseworkers have a responsibility to:
- follow the advice given at all times
- not depart from the guidance given on appeals or maintenance work, without approval from the co-ordination team
- seek advice from the co-ordination team before starting any new work
5. Legal framework

5.1 Purpose built archives with specialist elements for the preservation of documents and collections are a sui–generis class and consequently, as a general rule, only evidence relating to hereditaments in the mode or category of use is pertinent.

See Scottish and Newcastle (Retail) Ltd v Williams (VO) RA 119 and the subsequent Court of Appeal decision – Williams (VO) v Scottish and Newcastle Retail and Allied Domecq.

And Dawkins (VO) v Royal Leamington Spa BC and Warwickshire County Council (1961) RVR 291.

See RM Section 2 Part 7 Appendix 2 for further guidance on mode and category of use.

5.2 The principles laid down by the Court of Appeal in the case of Garton v Hunter (VO) 1969 RA 11 give guidance on the method of valuation to be adopted and the weight to be attached to the available evidence.

5.3 Original County Records Offices (built prior to 1990) are unlikely to be ‘sui generis’ and will fall to be valued by the rentals / comparison method as stores and offices.

6. Survey requirements

Description

6.1 County Councils, Local Authorities and other organisations have been responsible for the archiving of records for many years. These include ancient and historic documents, maps, films and sound clips from many sources. Local authorities are also required to keep secure records of adoptions etc. Traditionally they were kept in basements and attics under less than ideal conditions. In recent years archival research has become increasingly popular and purpose-built archives have been constructed countrywide on a County Council and City Council basis to provide appropriate storage and facilitate public access to the records.

6.2 Archives are also constructed by organisations such as museums, whose collections in storage often outweigh those on display. The requirements for these sites can vary widely, and can include protecting from pests and mould, unusual fire risks, and dust. British Standard BS 4971:2017 Conservation and care of archive and library collections was introduced in 2017, followed by BS EN xx-xxxx-xxxx:2018 Conservation of Cultural Heritage in 2018. These superseded BS5454 and BSI PD5454. The following paragraphs relate mainly to traditional mixed archive collections. In other sites, the required storage conditions should be established.

6.3 As a result of the need for local authorities to provide suitable accommodation a new generation of purpose-built archive buildings began to be built from 1989/1990. Co-location with libraries and museums has also helped to raise the profile of archives.

6.4 The website of the principal professional body for archivists, archive conservators and records managers in the UK is a useful source reference.

Other bodies may hold archival material, and it will be a matter for valuer judgment, based on the physical characteristics described below, whether the building is sufficiently specialised as to require valuation under the provisions of this Section.

6.5 The most recent buildings (1995 onwards) are sophisticated and with a minimum 20 years forward storage capacity (sometimes space is allocated to other authorities who have not yet completed a BS compliant archive building of their own). There will be two main entry points, one for the public, and one for archive contents. Stores are secure with restricted access to parts as many documents are unique and some are confidential eg adoption records. The stores must be maintained at a stable environment of 35% - 60% humidity and 13 - 20 degrees Celsius. Plant and machinery areas are substantial due to these requirements. Natural lighting is kept to a minimum as UV light damages paper material. Fire protection, particularly to the storage areas has become increasingly sophisticated from bespoke water-based systems (water damaged items can be freeze-dried) to argon-based gas-suppressant (oxygen is replaced by argon) or Oxy-Reduct (oxygen is mechanically drawn out of the storage areas) thereby preventing fires from taking place. This latter system requires airtight construction of the storage area.

6.6 The public area has a lot of the attributes of best quality central libraries or good quality museum display space, with light, open areas, there is often also a large gallery / room for exhibitions / conferences as needed. The archivists have offices as normal administration areas, but also ‘wet’ and ‘dry’ laboratories which are temperature / humidity controlled for active conservation of materials. The ‘goods inwards’ areas usually have freeze drying machines so that all materials can be ‘de-bugged’ before acceptance for conservation and storage. There may also be a small cinema or similar for screening film archives.

6.7 Film archive storage is specialised as old nitrate film is highly flammable and film archives are generally standalone.

6.8 In modern purpose-built archives, accommodation will generally be split 50:50 between storage areas and public/staff areas. Some recent archives have been constructed with ceiling heights between 2.5m - 3.0m giving a greater volume of storage space for the same building footprint. Walls and floors are often constructed of concrete to provide good floor loading capacity and also a thermal mass to protect the archive. Key components in the siting and construction of archives are as follows:
- Site away from hazards of fire, subsidence, atmospheric pollution, noise and vandalism
- Preference for a free-standing building, single occupancy
- Unimpeded access for emergency services, especially fire brigade, to all parts of the exterior
- If the public are to be admitted, easy access by public transport
- Access for deliveries, and parking for staff and the public
- Orientation of building to reduce direct sunlight in storage areas
- Good natural light for office, conservation workshop and reading rooms
- Consider future expansion space
6.9 Plant and Machinery plays an important part in the performance of archives
- Temperature Control - Archives should be kept at between 13 Degrees and 20 Degrees Celsius
- Humidity Control - Archives should be kept at between 35% - 60% relative humidity
- Fire Control - Archive material is unique and requires protection from fire. Some archives adopt a water-based sprinkler system (water-damaged items can be freeze-dried), some archives use an inert gas such as Argon to extinguish fires, whilst the British Library has adopted an Oxy-Reduct system in its archive in Wetherby.
- Security - Not only are unique and sometimes very valuable documents held in archives, but also sensitive records are held in the County Records archive eg adoption records. Security is of paramount concern hence secure entry points, and CCTV are common features.
7. Survey capture

7.1 The standard measurement should be Gross Internal Area (GIA), as defined in the Code of Measuring Practice for Rating Purposes. Separate areas for public access, archive storage, offices, laboratories, plant rooms etc. should be identified. Plant should be noted in the form of heating, air conditioning and fire suppressant systems. Green energy plant (photovoltaic panels, wind turbines etc) should also be noted.

7.2 Note should also be made on inspection of the extent of any car parking areas (including the number of car spaces) and details of other external works - car park barrier controls, CCTV, external lighting, paved and landscaped areas. The site area should be recorded and comment made on file regarding whether the developed site is adequate or under or over sized for the building it serves.

7.3 Record full details of plant and machinery which is concerned with temperature, fire humidity and security control.

8. Valuation approach

8.1 The appropriate method of valuation for purpose built archives is likely to be the Contractor’s Basis. A rentals approach may be appropriate for older archives within an old building.

8.2 The selection of valuation method is a question of fact depending upon the particular attributes of the individual hereditament. It is for the valuer to use judgment to establish the most appropriate method given the following guidance:

Original County Records Offices (built prior to 1990) are unlikely to be ‘sui generis’ and will fall to be valued by the rentals / comparison method as stores and offices. For the avoidance of doubt, the above SCAT Code is inappropriate for these buildings.

Purpose-built Archive hereditaments will, ‘rebus sic stantibus’, be unsuited to rentals / comparable method and should be valued by reference to the Contractor’s Basis. However care should be taken not to accept the word ‘archive’ at face value in relation to an occupier’s own description of it. Archive is a generic term for any ‘place containing records, documents, or other materials of historical interest’, while this Practice Note relates to whole hereditaments where that is the primary purpose, and where the building is intended to conform to PD5454.

8.3 . Overcapacity

All archives are purpose-built to accommodate future growth. If they were not built in this manner, they would be full to capacity in a short space of time which would be a rather short-sighted development. No allowance for initial over capacity or superfluity should be given at any stage of the contractor’s basis of valuation in this respect.

8.4 Information gathering

As the preferred method of valuation is the Contractors Method, cost evidence should be sought issuing Cost Form of Return VO 6065 via the appropriate Market Information Team (MIT). On receipt of the completed form advice as regard analysis of costs should be sought from NVU BAMS.

9. Valuation support

Valuations of purpose built archives are to be carried on the appropriate spreadsheet held on the Non Bulk Server. Details of records offices which fall to be valued on the rental/comparative basis should be captured on RSA and valued in accordance with the appropriate scheme.

Practice note: 2023 - archives

1. Market appraisal

1.1 There remains a demand both from County archive departments and private and charitable institutions to provide higher grade accommodation for the storage of archived material. Purpose built archives are generally constructed to comply with the advice set out in BS PD5454 (published 2012) and often designed to incorporate Passivhaus standards. Work has been completed or is currently underway in both England and Wales in regard to the construction of several new archives.

Examples of new archives can be found easily on the internet.

1.2 It remains the case that this is a sector in which the nature and quantity of the material to be stored largely determines the design requirements of the building which is to house that material. Consequently, some archive buildings demonstrate characteristics such as heights of 15 metres or more or the incorporation of building services specific to the type of material being housed which are not necessarily shared with the bulk of modern archive buildings and this may significantly influence the cost of provision.

2. Changes from the last practice note

The section relating to market appraisal has been reviewed as have the figures relating to estimated replacement cost, external works additions, fees, age and obsolescence allowances and land value.

3. Ratepayer discussions

No discussions have taken place with any representative body or their agents.

4. Valuation scheme

4.1.1 The selection of valuation method is a question of fact depending upon the particular attributes of the individual hereditament. It is for the case worker to use judgment to establish the most appropriate method given the following guidance:

4.1.2 Original County Records Offices (built prior to 1990) are unlikely to be ‘sui generis’ and will fall to be valued by the rentals / comparison method as stores and offices. For the avoidance of doubt, SCAT Code 404 is inappropriate for these buildings.

4.1.3 Purpose built archive hereditaments will, ‘rebus sic stantibus’, be unsuited to rentals / comparable method and should be valued using the Contractor’s Basis. However, care should be taken not to accept the word ‘archive’ at face value in relation to an occupier’s own description of it. Archive is a generic term for any ‘place containing records, documents, or other materials of historical interest’, while this practice note relates to whole hereditaments where that is the primary purpose, and where the building is intended to conform to PD5454. In these instances, the Contractor’s Basis is the most appropriate valuation approach.

4.2 Valuation using the contractor’s basis

4.2.1 Stage 1 - estimated replacement cost

Building costs

The actual GIA of the archive should be used to calculate the Estimated Replacement Cost (Stage 1), see Appendix A below.

Archive buildings within museums or libraries or other hereditaments should be valued having reference to the costs adopted for those particular types of property except in circumstances where the archive facility constitutes a clearly identifiable specialised building or otherwise forms the majority of the building floor area of the hereditament.

Archive buildings which exhibit unusual characteristics as for example those referred to in 1.2 above should not be costed using cost guide reference 63500G. Specific cost advice is to be obtained from NVU/Building or Quantity Surveyor (BEAMS).

Basement areas within archive buildings occupied for archive storage should be cost at the same rate as above ground archive storage. Basement areas will be more expensive to construct than above ground accommodation but the ‘modern substitute’ approach should be adopted for their build costs which would normally be on the basis of above ground storage.

4.2.2 External works - Additions are to be made in accordance with the guidelines in Appendix B below.

4.2.3 Contract size - Adjustments should be made in accordance with Appendix C below.

4.2.4 Location factors are to be applied in accordance with Appendix D below.

4.2.5 An addition for fees should be made in accordance with Appendix E below.

4.2.6 Stage 2 – Age and Obsolescence

The Estimated Replacement Cost (ERC) established at Stage 1 above is converted to Adjusted Replacement Cost (ARC) by applying an age and obsolescence allowance.

The standard age and obsolescence allowances (non–industrial) to be applied to the ERC of the individual blocks of permanent buildings are set out in Rating Manual: section 4 part 3 - the Contractor’s basis of valuation. Adjustments for age and obsolescence should be made in accordance with Appendix F.

The scales contained in Appendix F take into account the following salient points:

a. The age and obsolescence scales set out in the rating manual have been agreed to represent the combined age-related physical depreciation along with functional obsolescence and technological redundancy exhibited by buildings of each age typical for their quality/specification and condition. It is anticipated that the stated allowances will be adopted in the majority of cases and only either moderated or increased in exceptional circumstances.

b. Extensions are to be given an allowance appropriate to their age unless of a lower specification than would be expected of a building of that age in which case the allowance should be increased to a level appropriate to reflect the specification of the building as a whole.

c.In respect of physical depreciation, the above scales are intended to reflect normal wear and tear and/or deterioration due to the age of the building. The scales assume an average degree of cyclical refurbishment work will have been undertaken, to include whole or partial renewal of building sub-components, most particularly relating to mechanical and electrical services and internal fit-out, but also including periodic renewal of roof coverings and windows.

d. It follows from the above that no adjustment away from the scales is required in the majority of cases where older buildings have been subject to modernisation and refurbishment works, as these are explicitly assumed to have occurred. An exception to this would be for a building taken back to shell and reconstructed with significant renewal of structural elements, where an abatement of age-related physical obsolescence may be required.

e. An example of a building requiring an abatement of the allowances provided by the scales (due to the mitigation of physical depreciation) would be where a major renovation has occurred utilising the original building foundations, frame (including upper floors) but with comprehensive replacement of the external envelope (walls, windows), a complete internal refit and wholescale replacement of mechanical and electrical services.

f. Conversely, the above scales will be insufficient to reflect physical obsolescence in cases where buildings are substantially un-modernised and in any case, the scales do not apply in instances where the hereditament is not repairable at reasonable cost and where it falls to be valued rebus sic stantibus.

g. To qualify as a substantially un-modernised building it is expected that the building will predominantly have the following:
- single glazed windows
- original internal layout
- original ceiling height, with no suspended ceilings
- original external walls
- pre 1980 internal finishes (flooring, ceiling and walls, internal doors and fixtures and fittings)
This is not intended to be applicable to prestige buildings that add character and esteem to the hereditament.

h. In respect of functional and technological obsolescence, for buildings that remain in operational use, the scales include adjustments to reflect functional and technological deficiencies observable in buildings typical of their original period of construction but taking account of the level of assumed cyclical refurbishment reflected in the physical depreciation element of the scales.

i. The type of functional and technological obsolescence factors already reflected in the scales include the following:
- poor energy efficiency and/or environmental sustainability
- inappropriate layout inhibiting flexible and efficient space utilization
- modern health and safety, fire or building regulations that preclude or limit the original purposes of the building
- dated design practices that restrict modern usage (such as lack of/or minimal floor and ceiling voids)
- the absence of modern space heating or air conditioning systems within a building
j.It follows that only where buildings display specific functional deficiencies or issues of technological redundancy, that are atypical for their age, the age-related allowances provided by the scales should be increased.

k. One indicator that additional functional obsolescence is present such that the allowance provided by the scales should be adjusted is the presence of new and/or replacement facilities making the existing building surplus. Such replacement or other material redundancy should be considered and may result in the total redundancy of the pre-existing building, i.e. 100% obsolescence.

l.If at the Antecedent Valuation Date, where there are buildings, or parts of buildings, that through an established pattern of use have been unused for a number of years the area of these buildings, or parts of buildings, is to be excluded from the GIA.

m. This adjustment takes into account deficiencies in the actual building from an occupational point of view, which is not reflected in the ERC.

4.2.7 Stage 3 – land value

Land values should have regard to the prevailing land use in the locality. Where archives are situated in central fringe areas then the residential central fringe values in the 2023 Land Value Practice Note should be followed, less the 20% Dawkins discount. No such discount should be applied where there is evidence of land being acquired at the full value for the prevailing use in the area. There are beacon towns and cities to provide a guide and interpolation may be necessary. Where archives are situated elsewhere then consider the land value categories outlined in the land value Practice Note.

4.2.8 Stage 4 – de-capitalisation rate

The estimated replacement cost (ERC) of the hereditament shall be de-capitalised to an annual equivalent by taking the prescribed (higher) rate. Please note that archives are not educational buildings within the statutory meaning.

4.2.9 Stage 5 – end adjustments

Any advantage or disadvantage, which might affect the value of the occupation of the hereditament as a whole, should be reflected at this stage. An adjustment under this head should not duplicate adjustments made elsewhere. No allowance should be granted for over capacity or ‘surplusage’. All purpose-built archives constructed in accordance with PD 5454 provide for a minimum 20 years’ growth capacity (Para.5.3).

4.3 IT support

Where the contractor’s basis is appropriate the standard generic contractor’s Spreadsheet held on the Non-Bulk Server should be used for all valuations, selecting ‘archives’ from the drop-down menu.

Appendix A

Building Costs

The costs to be used in valuing this property class are given below.

Appendix B

Suggested % addition for External Works

Appendix C

Contract Size Adjustment

The adjustment for contract size should be made having regard to the total ERC (after adjustment for location but before the addition for fees) in accordance with the following scales:

Appendix D

Location Factors

N.B. The Regions referred to are administrative areas and are not significant boundaries.

Appendix E

Professional Fees and charges

Fees should be added at the percentages shown in the VOA published Cost Guide at Section 7. For convenience these are shown below inclusive of the 4% complexity addition. Note that minimum fees may apply to counter inversion.

Appendix F

Age and Obsolesence Allowances

Table 1: Civic Buildings Obsolescence Allowances

Practice note: 2017 - archives

1. Market appraisal

1.1 A number of archives have been constructed since 2000 as County Councils fulfil their obligation to protect their records and make them accessible to the public. The more recent completions are as follows:
- A new archive was completed in 2009 in Cardiff (Glamorgan Archives, Clos Parc Morgannwg, Canton, Cardiff CF11 8AW)
- A new archive was completed in 2011 in Carlisle attached to a Victorian mansion which has been refurbished as part of the overall project (Cumbria Archive Centre, Petteril Bank Road, Carlisle, CA1 3AJ).
- A similar project was completed in 2011 at Ebbw Vale at the old steelworks (Gwent Records Office The Works, Steel Works Road, Ebbw Vale, NP23 6AA . Like the Glamorgan Archives, this property has been constructed to serve a number of local authorities.
- A new Archive was completed in Brighton in 2013 (The Keep, Woollards Way, Falmer, Brighton, BN1 9BP)
- another was completed in 2014 in Dudley, West Midlands (Archive Centre, Tipton Road, Dudley, West Midlands, DY1 4SA)
- and another is currently (February 2015) under construction in Hereford
These are typical of current archives being built each with a ‘Repository Block’ - a temperature and humidity controlled secure storage area, together with a ‘People Block’ - the area given over to public reading rooms, administration offices, conservation workshops etc.

1.2 Some specialised archive storage facilities where volume of storage is paramount (e.g. The British Library and The Bodleian Library in Swindon) have constructed high bay buildings internally fixed with self-supporting racking. Automatic pickers retrieve items required thereby protecting the atmospheric integrity of the storage building. The cost of these high bay buildings is likely to be higher than standard archive buildings.

1.3 Two purpose-built film archives have recently been built,
- National Film Archive, Lighthorne, Warwick, CV35 0BQ
- Imperial War Museum Film Archive at Grange Farm, Grange Road, Ickleton, Saffron Walden, Essex, CB10 1TA
Costs for these archives are greater than the standard costs reflecting the need to provide protection against fires and explosion of the stored film archive.

1.4 The Building Standard guidance previously provided in BS5454 has now been reviewed and replaced by PD5454 (published 2012). This new document is a more substantial publication, being 76 pages, and brings the previous standard up-to-date. Although it still has an emphasis on preservation of valuable documents – such as manuscripts – and the exhibition of such documents, it is now much more applicable in a business archive scenario. It also addresses storage of digital media.

The document begins with detailed guidance on the nature of documents and best practice for their storage and use. This includes topics such as environmental controls for different media, protection against mould, infestation and pollution, environmental monitoring, environmental control, packaging and security. The guide then goes on to describe the repository building and measures that can be taken in the design and build of an archive facility. This section includes hazard avoidance, security, construction, environmental stability, fire and water protection, load distribution, shelving and lighting, to name but a few.

2. Changes from the 2010 list practice note

The factors giving rise to the choice of method of valuation and application of the methods of valuation have not significantly changed from the 2010 Practice Note.

3. Ratepayer discussions

No discussions have taken place with any representative body or their agents

4. Valuation scheme

4.1 The costs shown in this section are for ease of reference. In all cases where a cost guide code is shown that must be input into the NBS template, not the costs shown here. Where the cost guide code shows options, the costs shown in this practice note should be used to aid selection. Should the cost guide show differing costs to those shown in a current version of this practice note, please refer to the CCT.

4.2 The selection of valuation method is a question of fact depending upon the particular attributes of the individual hereditament. It is for the valuer to use judgment to establish the most appropriate method given the following guidance:

4.3 Original County Records Offices (built prior to 1990) are unlikely to be ‘sui generis’ and will fall to be valued by the rentals / comparison method as stores and offices. For the avoidance of doubt, SCAT Code 404 is inappropriate for these buildings.

4.4 Purpose built Archive hereditaments will, ‘rebus sic stantibus’, be unsuited to rentals / comparable method and should be valued to Contractor’s Basis. However care should be taken not to accept the word ‘archive’ at face value in relation to an occupier’s own description of it. Archive is a generic term for any ‘place containing records, documents, or other materials of historical interest’, while this Practice Note relates to whole hereditaments where that is the primary purpose, and where the building is intended to conform to PD5454.In these instances, the Contractor’s Method is the most appropriate valuation approach.

4.5 Valuation on the contractors basis

Stage 1 - estimated replacement cost

4.5.1 Building cost

The GIA of the archive should be used to calculate the Estimated Replacement Cost (Stage 1) of the building by applying a substitute building cost as specified in the cost guide (under reference 63500G) of £2,200. Archive buildings within museums or libraries or other hereditaments should be valued having reference to the costs adopted for those particular types of property.

Film archives are to be cost individually after having taken advice from the appropriate Valuer in NVU and BAMS.

Basement areas within archive buildings occupied for archive storage should be cost at the same rate as above ground archive storage. Basement areas will be more expensive to form than above ground accommodation but the ‘simple substitute’ approach should be adopted for their build costs which would normally be on the basis of above ground storage. There may be grounds for a Stage 2 allowance for basement accommodation which is either damp and / or has poor access.

4.5.2 External works

Additions are to be made in the case of archives in accordance with the following guidelines

4.5.3 Contract size adjustments should be made in accordance with standard scales in the 2017 Cost Guide.

4.5.4 Location Factors are to be applied in accordance with the figures given in the 2017 Cost Guide.

4.5.5 An addition for Fees should be made in accordance with the guidance in the 2017 Cost Guide.

Stage 2 – age and obsolescence

4.5.6 Adjustments for age and obsolescence should be made in accordance with the scales contained in Rating Manual - section 4 part 3: The Contractor’s Basis of Valuation : R2017 Practice Note: Stage 2 - Age and Obsolescence Allowances, and should be applied in most circumstances.

Stage 3 – land value

4.5.7 Land value should be arrived at by having regard to values prevailing in the locality (see 2017 practice note relating to land values), in accordance with Rating Manual section 4 part 3. A reduction of up to 20% from the prevailing land use value may be appropriate to reflect the mode and category of use, but this need not be made where there is evidence of land being acquired at the full value for the prevailing use in the area.

4.5.8 Where the site is excessive in size, reasonable assumptions should be made to arrive at an appropriate substitute, and consideration given as to whether gardens, play areas etc. should be added as undeveloped land (amenity value). Where a site area is restricted in size, only the actual area should be valued, but to avoid double counting, regard should be had to this when considering whether a further allowance at stage 5 is appropriate.

Stage 4 – decapitalisation rate

4.5.9 The effective capital value (ECV) of the hereditament shall be de-capitalised to an annual equivalent by taking the prescribed (higher) rate.

Stage 5 – end adjustments

4.5.10 Any advantage or disadvantage, which might affect the value of the occupation of the hereditament as a whole, should be reflected at this stage. An adjustment under this head should not duplicate adjustments made elsewhere.

4.5.11 No allowance should be granted for over capacity or ‘surplusage’. All purpose-built archives are constructed with a minimum 20 years’ growth capacity built in (PD 5454 Para.5.3).

4.6. IT support

4.6.1 Where the Contractor’s Basis is appropriate the standard generic Contractor’s Spreadsheet held on the Non Bulk Server should be used for all valuations selecting ‘Archives’ from the drop-down menu.

4.6.2 Where the rentals method of valuation is employed, records should be captured and valuations carried out by applying an appropriate scheme using the Rating Support Application (RSA).