SIA approved contractors
Source: gov.uk (2025-12-02)

Data on SIA approved contractors. Includes the total number of approved contractors and a breakdown by licensing sector and UK region.

This page is updated on a monthly basis.

SIA approved contractors: December 2025 (https://assets.publishing.service.gov.uk/media/692ebb8f345e31ab14ecf87d/sia-approved-contractors-december-2025.ods) (ODS, 7.25 KB)

SIA approved contractors: November 2025 (https://assets.publishing.service.gov.uk/media/690b3a949456634d9795fdf5/sia-approved-contractors-november-2025.ods) (ODS, 7.28 KB)

SIA approved contractors: October 2025 (https://assets.publishing.service.gov.uk/media/68ef968af159f887526bbeaa/sia-approved-contractors-october-2025.ods) (ODS, 7.27 KB)

SIA approved contractors: September 2025 (https://assets.publishing.service.gov.uk/media/68b85d313f3e5483efdba95b/sia-approved-contractors-september-2025.ods) (ODS, 7.28 KB)

SIA approved contractors: August 2025 (https://assets.publishing.service.gov.uk/media/68932138f97cd7adaa2be016/sia-approved-contractors-august-2025.ods) (ODS, 7.29 KB)

SIA approved contractors: July 2025 (https://assets.publishing.service.gov.uk/media/6866528fdd1a7e01559e6d13/sia-approved-contractors-july-2025.ods) (ODS, 7.33 KB)

SIA approved contractors: June 2025 (https://assets.publishing.service.gov.uk/media/68595a49eaa6f6419fade63a/sia-approved-contractors-june-2025.ods) (ODS, 7.32 KB)

SIA approved contractors: May 2025 (https://assets.publishing.service.gov.uk/media/6814fcd83c3bba3526f03b91/sia-approved-contractors-may-2025.ods) (ODS, 7.29 KB)

SIA approved contractors: April 2025 (https://assets.publishing.service.gov.uk/media/67efa08922a7bab256d9562d/sia-approved-contractors-april-2025.ods) (ODS, 7.33 KB)

SIA approved contractors: March 2025 (https://assets.publishing.service.gov.uk/media/67d420686ec9d5faee33f7d2/sia-approved-contractors-march-2025.ods) (ODS, 7.31 KB)

SIA approved contractors: February 2025 (https://assets.publishing.service.gov.uk/media/67a6270a6006e4154dc498b0/sia-approved-contractors-february-2025.ods) (ODS, 7.32 KB)

SIA approved contractors: January 2025 (https://assets.publishing.service.gov.uk/media/677bfc9e99c93b7286a39704/sia-approved-contractors-january-2025.ods) (ODS, 7.28 KB)

SIA approved contractors: December 2024 (https://assets.publishing.service.gov.uk/media/6751cfe62086e98fae3511b7/sia-approved-contractors-december-2024.ods) (ODS, 7.3 KB)

SIA approved contractors: November 2024 (https://assets.publishing.service.gov.uk/media/672df7564f7608e424ffda7e/sia-approved-contractors-november-2024.ods) (ODS, 7.34 KB)

SIA approved contractors: October 2024 (https://assets.publishing.service.gov.uk/media/66ffbefda31f45a9c765f12f/sia-approved-contractors-october-2024.ods) (ODS, 7.29 KB)

SIA approved contractors: September 2024 (https://assets.publishing.service.gov.uk/media/66d9b30dfb86ba5a1f214e82/sia-approved-contractors-september-2024.ods) (ODS, 7.3 KB)

SIA approved contractors: August 2024 (https://assets.publishing.service.gov.uk/media/66b335c00808eaf43b50de20/sia-approved-contractors-august-2024.ods) (ODS, 7.27 KB)

SIA approved contractors: July 2024 (https://assets.publishing.service.gov.uk/media/6687d18a541aeb9e928f4517/sia-approved-contractors-july-2024.ods) (ODS, 7.52 KB)

SIA approved contractors: June 2024 (https://assets.publishing.service.gov.uk/media/6661cabb8715b53c0086a4d3/sia-approved-contractors-june-2024.ods) (ODS, 7.43 KB)

SIA approved contractors: May 2024 (https://assets.publishing.service.gov.uk/media/6634b1b21834d96a0aa6d093/sia-approved-contractors-may-2024.ods) (ODS, 7.34 KB)

SIA approved contractors: April 2024 (https://assets.publishing.service.gov.uk/media/660d26ef38f66c001e84a989/sia-approved-contractors-april-2024.ods) (ODS, 7.31 KB)

SIA approved contractors: March 2024 (https://assets.publishing.service.gov.uk/media/65e83a6508eef600155a5646/sia-approved-contractors-march-2024.ods) (ODS, 7.33 KB)

SIA approved contractors: February 2024 (https://assets.publishing.service.gov.uk/media/65c9e6949c5b7f0012951c93/sia-approved-contractors-february-2024.ods) (ODS, 7.31 KB)

SIA approved contractors: January 2024 (https://assets.publishing.service.gov.uk/media/65958df2c23a10000d8d0b38/sia-approved-contractors-january-2024.ods) (ODS, 7.32 KB)

SIA approved contractors: December 2023 (https://assets.publishing.service.gov.uk/media/656ef4f79462260705c56900/sia-approved-contractors-december-2023.ods) (ODS, 7.35 KB)

SIA approved contractors: November 2023 (https://assets.publishing.service.gov.uk/media/6543ae4d1f1a60000d360cdf/sia-approved-contractors-november-2023.ods) (ODS, 7.35 KB)

SIA approved contractors: October 2023 (https://assets.publishing.service.gov.uk/media/651c1042bef218000e6dec86/sia-approved-contractors-october-2023.ods) (ODS, 7.36 KB)

SIA approved contractors: September 2023 (https://assets.publishing.service.gov.uk/media/64f6e25ba78c5f000d8870a8/sia-approved-contractors-september-2023.ods) (ODS, 7.36 KB)

SIA approved contractors: August 2023 (https://assets.publishing.service.gov.uk/media/64c90ff45c2e6f0013e8d8a7/sia-approved-contractors-august-2023.ods) (ODS, 7.37 KB)

SIA approved contractors: July 2023 (https://assets.publishing.service.gov.uk/media/64a5af44c531eb000c64ff1c/sia-approved-contractors-july-2023.ods) (ODS, 7.37 KB)

SIA approved contractors: June 2023 (https://assets.publishing.service.gov.uk/media/647da4455f7bb700127fa421/sia-approved-contractors-june-2023.ods) (ODS, 7.35 KB)

SIA approved contractors: May 2023 (https://assets.publishing.service.gov.uk/media/6454c2c62f6222000ca6a57f/sia-approved-contractors-may-2023.ods) (ODS, 7.66 KB)

SIA approved contractors: April 2023 (https://assets.publishing.service.gov.uk/media/642d51effbe620000c17dcfa/sia-approved-contractors-april-2023.ods) (ODS, 7.41 KB)

SIA approved contractors: March 2023 (https://assets.publishing.service.gov.uk/media/64021e41e90e0740d874e8bd/sia-approved-contractors-march-2023.ods) (ODS, 7.61 KB)

SIA approved contractors: February 2023 (https://assets.publishing.service.gov.uk/media/63dcddb4e90e075da0353ea8/sia-approved-contractors-february-2023.ods) (ODS, 8.02 KB)

SIA approved contractors: January 2023 (https://assets.publishing.service.gov.uk/media/63b6ab02e90e077252ec30b1/sia-approved-contractors-january-2023.ods) (ODS, 8.01 KB)

SIA approved contractors: December 2022 (https://assets.publishing.service.gov.uk/media/6388b6a9e90e071dfd1e6693/sia-approved-contractors-december-2022.ods) (ODS, 8.03 KB)

SIA approved contractors: November 2022 (https://assets.publishing.service.gov.uk/media/63613e5e8fa8f5057864ffc6/sia-approved-contractors-november-2022.ods) (ODS, 7.98 KB)

SIA approved contractors: October 2022 (https://assets.publishing.service.gov.uk/media/633c4060d3bf7f187f35b934/sia-approved-contractors-october-2022.ods) (ODS, 8.01 KB)

SIA approved contractors: September 2022 (https://assets.publishing.service.gov.uk/media/6310d8c68fa8f5578d56564b/sia-approved-contractors-september-2022.ods) (ODS, 7.46 KB)

SIA approved contractors: August 2022 (https://assets.publishing.service.gov.uk/media/62e8fe44e90e071439a1084d/sia-approved-contractors-august-2022.ods) (ODS, 7.39 KB)

SIA approved contractors: July 2022 (https://assets.publishing.service.gov.uk/media/62bf20468fa8f54e8cd617bf/sia-approved-contractors-july-2022.ods) (ODS, 7.48 KB)

SIA approved contractors: June 2022 (https://assets.publishing.service.gov.uk/media/629f112b8fa8f5038ef7ca7f/sia-approved-contractors-june-2022.ods) (ODS, 7.33 KB)

SIA approved contractors: May 2022 (https://assets.publishing.service.gov.uk/media/627295bdd3bf7f0e7460292a/sia-approved-contractors-may-2022.xlsx) (MS Excel Spreadsheet, 17.5 KB)

SIA approved contractors: April 2022 (https://assets.publishing.service.gov.uk/media/624b03dad3bf7f32aa54d783/sia-approved-contractors-april-2022.ods) (ODS, 7.35 KB)

SIA approved contractors: March 2022 (https://assets.publishing.service.gov.uk/media/621e4b35d3bf7f4f02760888/sia-approved-contractors-march-2022.ods) (ODS, 7.31 KB)

SIA approved contractors: February 2022 (https://assets.publishing.service.gov.uk/media/61f96e138fa8f5388a7cccf3/sia-approved-contractors-february-2022.ods) (ODS, 7.32 KB)

SIA approved contractors: January 2022 (https://assets.publishing.service.gov.uk/media/61d457e08fa8f54c0e45721f/sia-approved-contractors-january-2022.ods) (ODS, 7.33 KB)

SIA approved contractors: December 2021 (https://assets.publishing.service.gov.uk/media/61a8b755e90e070449d49e68/sia-approved-contractors-december-2021.ods) (ODS, 7.34 KB)

SIA approved contractors: November 2021 (https://assets.publishing.service.gov.uk/media/618265768fa8f5297b6440db/sia-approved-contractors-november-2021.ods) (ODS, 7.09 KB)

SIA approved contractors: October 2021 (https://assets.publishing.service.gov.uk/media/615b23f08fa8f529834947a7/sia-approved-contractors-october-2021.ods) (ODS, 7.25 KB)

SIA approved contractors: September 2021 (https://assets.publishing.service.gov.uk/media/6130e96d8fa8f503303fde47/sia-approved-contractors-september-2021.ods) (ODS, 7.43 KB)

SIA approved contractors: August 2021 (https://assets.publishing.service.gov.uk/media/610bf6218fa8f506ca4588b7/sia-approved-contractors-august-2021.ods) (ODS, 7.13 KB)

SIA approved contractors: July 2021 (https://assets.publishing.service.gov.uk/media/60df2e3bd3bf7f7c2c6ba2d3/sia-approved-contractors-july-2021.ods) (ODS, 7.1 KB)

SIA approved contractors: June 2021 (https://assets.publishing.service.gov.uk/media/60ba4f75e90e07439ba74fcf/sia-approved-contractors-june-2021.ods) (ODS, 7.1 KB)

SIA approved contractors: May 2021 (https://assets.publishing.service.gov.uk/media/609ce580d3bf7f288e9ede74/sia-approved-contractors-may-2021.ods) (ODS, 6.84 KB)

SIA approved contractors: April 2021 (https://assets.publishing.service.gov.uk/media/606f2317e90e076f504195e1/sia-approved-contractors-april-2021.ods) (ODS, 6.29 KB)

SIA approved contractors: March 2021 (https://assets.publishing.service.gov.uk/media/6040cfa8e90e077dce4d38b5/sia-approved-contractors-march-2021.ods) (ODS, 6.54 KB)

SIA approved contractors: February 2021 (https://assets.publishing.service.gov.uk/media/601a7019e90e07128d62cd6b/sia-approved-contractors-february-2021.ods) (ODS, 6.55 KB)

SIA approved contractors: January 2021 (https://assets.publishing.service.gov.uk/media/5ff73838e90e0763a48c02a4/sia-approved-contractors-january-2021.ods) (ODS, 6.55 KB)

SIA approved contractors: December 2020 (https://assets.publishing.service.gov.uk/media/5fdcc04c8fa8f5149490fc5d/sia-approved-contractors-december-2020.ods) (ODS, 7.77 KB)