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  3. Welwyn

Company directory · Welwyn

Trade and construction companies in Welwyn

121 active trade and construction companies registered in Welwyn, Hertfordshire, by trade.

Trade companies in Welwyn in numbers

From the Companies House register and filed balance sheets, as of 1 Oct 2026. The longest-established is A.E.Bullock Limited, incorporated in 1966.

Companies
121
Active, small or micro accounts
New in the last 12 months
12
10% of the total
Typical net assets
£8,030
Median of 93 latest balance sheets
Typical size
1 employee
Median average headcount
Accounts due in the next 3 months
38
Companies House deadlines

Still trading, by year incorporated

Active trade companies in Welwyn by year of incorporation0510152017: 9 incorporated (still active)920172018: 5 incorporated (still active)520182019: 8 incorporated (still active)820192020: 4 incorporated (still active)420202021: 6 incorporated (still active)620212022: 8 incorporated (still active)820222023: 5 incorporated (still active)520232024: 9 incorporated (still active)920242025: 12 incorporated (still active)1220252026: 10 incorporated (still active)102026
Active trade companies in Welwyn by year of incorporation0510152017: 9 incorporated (still active)9'172018: 5 incorporated (still active)5'182019: 8 incorporated (still active)8'192020: 4 incorporated (still active)4'202021: 6 incorporated (still active)6'212022: 8 incorporated (still active)8'222023: 5 incorporated (still active)5'232024: 9 incorporated (still active)9'242025: 12 incorporated (still active)12'252026: 10 incorporated (still active)10'26

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

Trades in Welwyn

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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