**Exhibit 8.1**

 

**SUBSIDIARIES OF ARCADIS N.V.**

 

**CONSOLIDATED COMPANIES**

 
| **Entity**                                          | ** ** | **Jurisdiction** |
|-----------------------------------------------------|------------|------------------|
| ARCADIS G & M, Inc.                             |       | Delaware         |
| ARCADIS Nederland B.V.                              |       | The Netherlands  |
| ARCADIS Europe B.V.                                 |       | The Netherlands  |
| ARCADIS USA B.V.                                    |       | The Netherlands  |
| ARCADIS Latin America B.V.                          |       | The Netherlands  |
| ARCADIS International B.V.                          |       | The Netherlands  |
| PRC Holding B.V.                                    |       | The Netherlands  |
| ARCADIS Asia B.V.                                   |       | The Netherlands  |
| ARCADIS Construction Services LLC                   |       | Colorado         |
| ARCADIS Corporate Services, Inc.                    |       | Colorado         |
| ARCADIS G&M of Michigan, LLC                    |       | Michigan         |
| Reese, Macon and Associates, Inc.                   |       | Florida          |
| ARCADIS FPS, Inc.                                   |       | Ohio             |
| Lawson, Noble & Webb, Inc.                      |       | Florida          |
| ARCADIS US Holdings, Inc.                           |       | Colorado         |
| Bessent, Hammink & Ruckman, Inc.                |       | Florida          |
| Diversity Partners, Inc.                            |       | Maryland         |
| ARCADIS Capital, Inc.                               |       | Colorado         |
| Giffels Associates                                  |       | Mexico           |
| ARCADIS FPS Architects & Engineers, LLC         |       | Ohio             |
| Construction Dynamics Group, Inc.                   |       | Maryland         |
| Lewis and Zimmerman Associates, Inc.                |       | Maryland         |
| ARCADIS G&M of Michigan, LLC                    |       | Michigan         |
| CDG International, Ltd                              |       | United Kingdom   |
| ARCADIS Regio B.V.                                  |       | The Netherlands  |
| ARCADIS PlanRealisatie B.V.                         |       | The Netherlands  |
| ARCADIS Geo- en Vastgoedinformatie B.V.             |       | The Netherlands  |
| B.V. Boreon                                         |       | The Netherlands  |
| Onroerend Goed Balkenweg B.V.                       |       | The Netherlands  |
| ARCADIS Infra B.V.                                  |       | The Netherlands  |
| ARCADIS Support B.V.                                |       | The Netherlands  |
| ARCADIS Euroconsult B.V.                            |       | The Netherlands  |
| ARCADIS Bouw en Vastgoed B.V.                       |       | The Netherlands  |
| ARCADIS FM Beheer B.V.                              |       | The Netherlands  |
| ARCADIS Enterprises B.V.                            |       | The Netherlands  |
| ARCADIS Ruimte en Milieu B.V.                       |       | The Netherlands  |
| LB&P Ecologisch Advies B.V.                     |       | The Netherlands  |
| ARCADIS Projecten B.V.                              |       | The Netherlands  |
| ARCADIS CZ Environmental Services s.r.o.            |       | Czech Republic   |
| Stedebouwkundig Adviesbureau Witpaard-Partners B.V. |       | The Netherlands  |
| Micon Bedrijfsadviseurs Milieu B.V.                 |       | The Netherlands  |
| Serasea B.V.                                        |       | The Netherlands  |
| Heidemij Realisatie 3 B.V.                          |       | The Netherlands  |
| Copijn Utrecht Holding B.V.                         |       | The Netherlands  |
| Heidemij Realisatie Deutschland GmbH                |       | Germany          |
| Glastuinverplaatsing Leidsche Rijn B.V.             |       | The Netherlands  |
| Ontwikkelings Maatschappij Floris V CV              |       | The Netherlands  |
| Glastuinbouwgebied Het Grootslag B.V.               |       | The Netherlands  |
| Bio Science Park I B.V.                             |       | The Netherlands  |

 

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| B.V. Venlo TPN                                              |   | The Netherlands |
|-------------------------------------------------------------|--------|-----------------|
| ROW de Ruiter B.V.                                          |   | The Netherlands |
| Stationswijk B.V.                                           |   | The Netherlands |
| Heidemij Realisatie II B.V.                                 |   | The Netherlands |
| Heidemij Realisatie I B.V.                                  |   | The Netherlands |
| Konijn Hoorn Machinebouw B.V.                               |   | The Netherlands |
| Copijn Utrecht B.V.                                         |   | The Netherlands |
| Copijn Utrecht International Tree Services B.V.             |   | The Netherlands |
| Copijn Utrecht Tuin en Landschapsarchitecten B.V.           |   | The Netherlands |
| Copijn Utrecht Eurobomen B.V.                               |   | The Netherlands |
| Copijn Utrecht Boomchirurgen B.V.BA                         |   | Belgium         |
| Copijn Luxemburg SA                                         |   | Luxembourg      |
| Vastgoed Data B.V.                                          |   | The Netherlands |
| KLM Aerocarto B.V.                                          |   | The Netherlands |
| Involon B.V.                                                |   | The Netherlands |
| Ilis B.V.                                                   |   | The Netherlands |
| KLM Aerocarto NV                                            |   | Suriname        |
| KLM Aerocarto Belgium B.V.BA                                |   | Belgium         |
| Autarcis B.V.                                               |   | The Netherlands |
| V.O.F. SAT                                                  |   | The Netherlands |
| ARCADIS BMB Management Consultants B.V.                     |   | The Netherlands |
| GP Kenia B.V.                                               |   | The Netherlands |
| Ingenieursbureau Grabowsky & Poort International B.V.   |   | The Netherlands |
| ARCADIS Caribbean N.V.                                      |   | Curacao         |
| ARCADIS St. Maarten N.V.                                    |   | St. Marteen     |
| ARCADIS Curaçao N.V.                                   |   | Curaçao    |
| ARCADIS Bonaire N.V.                                        |   | Bonaire         |
| Grabowsky&Poort Puerto Rico Inc.                        |   | Puerto Rico     |
| ARCADIS AQUMEN Facility Management B.V.                     |   | The Netherlands |
| ARCADIS Deutschland GmbH                                    |   | Germany         |
| ARCADIS Ekokonrem Sp.z.o.o.                                 |   | Poland          |
| Grupo EP Ingenieria y Servicios Integrales S.A.             |   | Spain           |
| ARCADIS Belgium N.V.                                        |   | Belgium         |
| ARCADIS Holding France S.A.                                 |   | France          |
| ARCADIS Geraghty & Miller International Limited         |   | United Kingdom  |
| Profil Sp. Z o.o.                                           |   | Poland          |
| ARCADIS Consult GmbH                                        |   | Germany         |
| ACD Vermessung GmbH                                         |   | Germany         |
| ARCADIS Cert GmbH                                           |   | Germany         |
| ARCADIS Bauconsult GmbH                                     |   | Germany         |
| ARCADIS Ingenieure GmbH                                     |   | Germany         |
| ARCADIS Liegenschaftsentwicklung GmbH                       |   | Germany         |
| HOMOLA Projektmanagement AG                                 |   | Germany         |
| HOMOLA Projektmanagement s.r.o.                             |   | Czech Republic  |
| EPTISA, Servicios de Ingenieria, S.A.                       |   | Spain           |
| EP, Servicios Integrales de Gestions, S.A.                  |   | Spain           |
| Auxiliar de Ingenieria, S.A.                                |   | Spain           |
| ESRI Espana Geosistemas, S.A.                               |   | Spain           |
| Sistemas de Informacion Territorial S.A. (Sitesa)           |   | Spain           |
| Alcalima Elenion, S.L.                                      |   | Spain           |
| Casta Servicios Sociosanitarios, S.A.                       |   | Spain           |
| Diseno, Desarrollo y Gestion de Centros de Visitantes, S.L. |   | Spain           |
| Ibering Estudios y Proyectos, S.A.U.                        |   | Spain           |
| Eptisa Enginyeria I Serveis S.A.U.                          |   | Spain           |
| Ingenieria de Instrumentacion y Control, S.A.               |   | Spain           |
| Eptisa-Cinsa Ingenieria y Calidad, S.A.                     |   | Spain           |
| Eptisa Proyectos Internacionales S.A.                       |   | Spain           |

 

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| NYE Sistemas, S.A.                                  |   | Spain           |
|-----------------------------------------------------|--------|-----------------|
| Electroconver EP, S.L.                              |   | Spain           |
| IHD, Handling España                           |   | Spain           |
| Eptisa Chile S.R.L.                                 |   | Chile           |
| Eptisa Colombia S.R.L.                              |   | Colombia        |
| Eptisa Argentina S.A.                               |   | Argentina       |
| Eptisa Brasil S.R.L.                                |   | Brazil          |
| Eptisa Rumania S.R.L.                               |   | Rumania         |
| Casta Dano Cerebral, S.A.                           |   | Spain           |
| C.A. Santa Teresa de Arevalo, S.L.                  |   | Spain           |
| C.A. San Juan de la Cruz, S.L.                      |   | Spain           |
| Starke Diekstra N.V.                                |   | Belgium         |
| ARCADIS Gedas N.V.                                  |   | Belgium         |
| ARCADIS Lapere N.V.                                 |   | Belgium         |
| ARCADIS Fally N.V.                                  |   | Belgium         |
| ARCADIS Domus FM                                    |   | Belgium         |
| ARCADIS FCI S.A.S.                                  |   | France          |
| Europe Etudes Gecti (EEG)                           |   | France          |
| ARCADIS ESG                                         |   | France          |
| Sobesol                                             |   | France          |
| S.E.G.G.                                            |   | France          |
| Geotechnika                                         |   | Czech Republic  |
| Mecasol                                             |   | France          |
| Renardet S.A.                                       |   | Switzerland     |
| Sauti Srl                                           |   | Italy           |
| Renardet S.A. & Partners L.L.C.                 |   | Oman            |
| ARCADIS GR                                          |   | France          |
| Procedes Spaciaux de contruction (P.S.C.)           |   | France          |
| Geolabo                                             |   | France          |
| ARCADIS Chile S.A.                                  |   | Chile           |
| ARCADIS Brasil Ltda                                 |   | Brazil          |
| ARCADIS US Holding, Inc.                            |   | Delaware        |
| ARCADIS Chile S.A.                                  |   | Chile           |
| ARCADIS Brasil Ltda                                 |   | Brazil          |
| ARCADIS Geotecnica S.A.                             |   | Chile           |
| GC Consultores Geotecnicos                          |   | Peru            |
| Geotecnica Consultores Ltd                          |   | Argentina       |
| Arcadis Geotécnica Bouw Infra Ltda.            |   | Chile           |
| Consorcio Arcadis Geotecnica Mimetal Ltda.          |   | Chile           |
| Inversiones de Infraestructura Cabo de Hornos Ltda. |   | Chile           |
| ARCADIS Logos Engenharia S.A.                       |   | Brazil          |
| ARCADIS Logos Energia S.A.                          |   | Brazil          |
| Enerconsult S.A.                                    |   | Brazil          |
| ARCADIS Hidro-Ambiente S.A.                         |   | Brazil          |
| ARCADIS Tetraplan S.A.                              |   | Brazil          |
| PRC Training B.V.                                   |   | The Netherlands |
| PRC Kostenmanagement B.V.                           |   | The Netherlands |
| ARCADIS Construction Consulting co, ltd             |   | Shanghai        |

 

 

**NON-CONSOLIDATED COMPANIES**

 
| **Entity**                                         | ** ** | **Jurisdiction** |
|----------------------------------------------------|------------|------------------|
| Holland Environmental Venture Fund Commandite B.V. |       | The Netherlands  |
| Holland Environmental Venture Fund Beheer B.V.     |       | The Netherlands  |
| Holland Environmental Venture Fund CV. Fund CV     |       | The Netherlands  |

 

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| Stichting Fagoed                                           |   | The Netherlands |
|------------------------------------------------------------|--------|-----------------|
| Dynamicon B.V.                                             |   | The Netherlands |
| EMDEME SA                                                  |   | Portugal        |
| Ecosystems B.V.                                            |   | The Netherlands |
| Combinatie Oost-Achterhoek B.V.                            |   | The Netherlands |
| Urbanet B.V.                                               |   | The Netherlands |
| P.G.N. Parkeergroep Nederland B.V.                         |   | The Netherlands |
| Brainliner B.V.                                            |   | The Netherlands |
| Vermeer-Heidemij v.o.f.                                    |   | The Netherlands |
| Waterwolf Dienstverlening Buitenruimte B.V.                |   | The Netherlands |
| Siberië CV                                            |   | The Netherlands |
| Bio Science Park CV                                        |   | The Netherlands |
| Grubbenvorst v.o.f.                                        |   | The Netherlands |
| VOF Meinga                                                 |   | The Netherlands |
| Eurotree GmbH                                              |   | Germany         |
| Adviseurs Bouwplan Ontwikkeling BGN Partners B.V.          |   | The Netherlands |
| Aronsohn ARCADIS Oosterdokseiland VOF                      |   | The Netherlands |
| Somerset                                                   |   | Maryland        |
| Sahelconsult Sarl, Ouagadougou                             |   | Burkina Faso    |
| Afid Consultants Sarl                                      |   | Senegal         |
| Euroconsult para Latinoamerica y el Caribe SA.             |   | El Salvador     |
| Darwish Consulting Engineers                               |   | Egypt           |
| Euroconsult Pakistan Ltd.                                  |   | Pakistan        |
| Brazilian Venture Consultants Ltda.                        |   | Brazil          |
| Ilaco do Brazil Ltda.                                      |   | Brazil          |
| Ilaco Suriname N.V.                                        |   | Suriname        |
| Eurasia Consult Ltd                                        |   | Kazachstan      |
| ARCADIS Konsult JSC                                        |   | Russia          |
| Surgroma N.V.                                              |   | Suriname        |
| CV Oude Grachtpad                                          |   | The Netherlands |
| New Park, Planungs- und Entwicklungsgesellschaft GmbH      |   | Germany         |
| Umweltlabor GmbH                                           |   | Germany         |
| Interplan Environmental Systems GmbH                       |   | Germany         |
| Eurolabors AG                                              |   | Germany         |
| Euro Facility Group Ltd.                                   |   | United Kingdom  |
| Braun & Schlokermann-ARCADIS Planungsgesellschaft mbH  |   | Germany         |
| AYH Homola Projects GmbH                                   |   | Germany         |
| Homola AYH Projects Ltd                                    |   | United Kingdom  |
| Jaakko Poyry Geotecnica Ltd                                |   | Chile           |
| Proyectos Aeroportuarios Ltd                               |   | Chile           |
| ORSA                                                       |   | Chile           |
| Consorcio Reg. GC JRI Ing. Ltda                            |   | Chile           |
| Consorcio Scetaroute-Grimaux, Varde, Geotécnica Ltda. |   | Chile           |
| Consorcio Geotécnica JRI S.A.                         |   | Chile           |
| Atlantis GmbH                                              |   | Germany         |
| Multilatina Engineering Ltda                               |   | Brazil          |
| Murta Energética S.A.                                 |   | Brazil          |
| Biogás Energia Ambiental S.A.                         |   | Brazil          |
| PIE-RP Termelétrica S.A.                              |   | Brazil          |
| Cocal Termelétrica S.A.                               |   | Brazil          |
| Cocal Termelétrica S.A.                               |   | Brazil          |
| Breitener Energética S.A.                             |   | Brazil          |
| Hidropower Energia S.A.                                    |   | Brazil          |
| Tupan Energia Eletrica S.A.                                |   | Brazil          |
| V.O.F. Stationseiland                                      |   | The Netherlands |
| V.O.F. De Ruijterkade                                      |   | The Netherlands |
| V.O.F. X-Pact                                              |   | The Netherlands |

 

----

 
| V.O.F. Modieslab                               |   | The Netherlands |
|------------------------------------------------|--------|-----------------|
| EMC Starck VOF                                 |   | The Netherlands |
| Geodynamique et Structure                      |   | France          |
| Getu                                           |   | Tunisia         |
| SEM Savoie Labo                                |   | France          |
| Eurometudes                                    |   | Romania         |
| Procedes Spaciaux de contruction (P.S.C.)      |   | France          |
| Geomechanika, s.r.o.                           |   | Czech Republic  |
| Solidex, a.s.                                  |   | Czech Republic  |
| Kamex, s.r.o.                                  |   | Czech Republic  |
| Geoprojekt, s.r.o.                             |   | Czech Republic  |
| Terratech, spol. S.r.o.                        |   | Czech Republic  |
| Terratec, spol. S.r.o.                         |   | Czech Republic  |
| Geoinzenyring, s.r.o.                          |   | Czech Republic  |
| ZPD d.d.                                       |   | Croatia         |
| ARCADIS Grabowski Grabowska                    |   | Poland          |
| Innovated Tree Services LLC                    |   | Delaware        |
| The GIS Foundation Partnership (Joint Venture) |   | North Carolina  |
| ARCADIS/BPA- Joint Venture                     |   | Georgia         |
| Global Rail Consortium LLC                     |   | Florida         |

 

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