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Builder companies in the Southampton area

716 builder companies have a registered office in the Southampton area (SO postcodes), and 150 of them were formed in 2025 or 2026. In their latest accounts, the typical one held £13,477 in cash and owed £43,824 at year end.

Companies House register, 1 September 2026, and accounts filed in the last twelve months. Compared with the official category “Construction of domestic buildings” (SIC 41202). Covers companies with a registered office in SO postcodes, including Southampton, Winchester, Eastleigh.

The numbers

Builder companies in the Southampton area (SO postcodes) compared with the same category across the UK. Typical figures are medians.
MeasureSouthamptonUK
Registered companies71671,271
Formed in 2025 or 2026150 (21%)23%
Being struck off or in liquidation97 (14%)13%
Typical cash at year end£13,477198 accounts£11,355
Typical amount owed at year end£43,824362 accounts£28,652
Typical number of employees1371 accounts1

What this means if you’re starting one

Cash is tight in this trade

At year end the typical builder company in the Southampton area (SO postcodes) holds £13,477 in cash and owes £43,824; that cash figure is lower than 81% of UK industries.

Typical operators end the year holding less cash than they owe, so there is little slack if takings dip or a big bill lands early.

Most of these businesses are run by one or two people

The typical builder company in the Southampton area (SO postcodes) reports 1 employee; the top quarter has 2 or more (371 filings).

You are mostly up against owner-operators. Your own hours are likely to be your biggest cost, and the easiest one to undercount.

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What these figures can’t tell you

Companies are counted where their registered office is, which may be an accountant or a home address rather than a shop. Sole traders and partnerships are not on the register, and electronically filed accounts cover roughly 60–75% of accounts filed each year. The figures describe companies that exist; they cannot prove demand for your idea or predict whether it will work. How the figures are built.

Builder in other places

Other businesses in Southampton

All business benchmarks in Southampton