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Construction · Harrow
Construction companies in Harrow
There are 3,998 construction companies registered in Harrow, spread across 8 postcode areas. Here is what they do, where they cluster, and how to get the full list.
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What they do — by trade
The trade mix across Harrow's 3,998 registered construction companies, by primary SIC activity:
Where they cluster — by postcode area
Registered offices by outcode — the densest is HA1 with 1,714 firms:
When they were founded
Company formations in the sector, by year (full calendar years):
A sample of the companies
A handful of the active construction companies registered across Harrow's postcodes:
| Company | Area |
|---|---|
| Alder Building Services Ltd | HA1 |
| Ach Plumbing And Heating Limited | HA1 |
| Sai Building Consultants Ltd | HA3 |
| Adr Brickwork Ltd | HA3 |
| Oa Developments London Limited | HA1 |
| Blue Mountain Plumbing And Heating Ltd | HA2 |
| Nvya Construction Ltd | HA3 |
| Alldenn Construction Limited | HA3 |
| Attila Waterproofing Ltd | HA1 |
| Shivas Construction Ltd | HA3 |
| Sun8 Developments Ltd | HA2 |
| Elson Build Ltd | HA1 |
Export all 3,998 construction companies in Harrow.
Each row includes the company name, number, status, incorporation date, full registered
address, postcode, SIC codes and a direct link to its Companies House record.
Quick answers
There are 3,998 construction companies with a registered office in Harrow on the Companies House register, of which 3,067 (77%) are currently active.
The HA1 postcode area has the highest concentration, with 1,714 of Harrow's construction companies registered there.
425 new construction companies were incorporated in Harrow during 2025, the most recent complete year on the register.