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Company directory · Harrow

Trade and construction companies in Harrow

3,623 active trade and construction companies registered in Harrow, Middlesex, by trade.

Trade companies in Harrow in numbers

From the Companies House register and filed balance sheets, as of 1 Oct 2026. The longest-established is Roslea Company Limited, incorporated in 1945.

Companies
3,623
Active, small or micro accounts
New in the last 12 months
595
16% of the total
Typical net assets
£4,650
Median of 2,557 latest balance sheets
Typical size
1 employee
Median average headcount
Accounts due in the next 3 months
891
Companies House deadlines

Still trading, by year incorporated

Active trade companies in Harrow by year of incorporation02004006002017: 144 incorporated (still active)14420172018: 186 incorporated (still active)18620182019: 178 incorporated (still active)17820192020: 204 incorporated (still active)20420202021: 227 incorporated (still active)22720212022: 226 incorporated (still active)22620222023: 234 incorporated (still active)23420232024: 278 incorporated (still active)27820242025: 473 incorporated (still active)47320252026: 455 incorporated (still active)4552026
Active trade companies in Harrow by year of incorporation02004006002017: 144 incorporated (still active)144'172018: 186 incorporated (still active)186'182019: 178 incorporated (still active)178'192020: 204 incorporated (still active)204'202021: 227 incorporated (still active)227'212022: 226 incorporated (still active)226'222023: 234 incorporated (still active)234'232024: 278 incorporated (still active)278'242025: 473 incorporated (still active)473'252026: 455 incorporated (still active)455'26

Companies still active today, by the year they were incorporated; 2026 is the year so far.

Trades in Harrow

Every company on these pages is an active private limited company that files small or micro-entity accounts. Each one has to deliver accounts to Companies House within 9 months of its year end, pay corporation tax 9 months and 1 day after it, and file a CT600 with HMRC within 12 months.

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