| RIBA Directory of Practices |
| Directory of more than 4,000 UK architectural practices, registered by the Royal Institute of British Architects. Searchable by names, places, and specialisms. |
| | RIBA Product Selector |
| A database of several thousand UK building products and their suppliers. Published by the commercial arm of the Royal Institute of British Architects. Available on subscription, with trial period. |
| | RICS Directory of Chartered Surveyors |
| Directory of more than 12,000 Chartered Surveyor members of the Royal Institute of Chartered Surveyors. Searchable by names, places and specialisms. |
| | Referenceline |
| UK regional service, covering Surrey and Hampshire. A database of building service firms, with ratings based on comments from users. |
| | Russia: Timber.ru |
| Sawmill directory, timber advertisements from Russia.Wood exporters directory. |
| | Salvo |
| International directory of suppliers of architectural salvage, including used timber, bricks, stone and cast iron. |
| | Specify It |
| Directory containing more than 250,000 pages of full text catalogues from more than 5,500 UK building product manufacturers and suppliers. Published by Technical Indexes Ltd. |
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