extension builder · Southampton · SO18 1NY
12 from adjacent districts — postcode shown on each card.
extension builder · Southampton · SO16 4LG
loft conversion · Southampton · SO30 3DZ
bricklaying · Southampton · SO16 9DT
✦ Local pricing insight
Builder in SO18 typically charge £35–£55/hr
Indicative pricing from market data — request quotes for exact figures.
✦ Builder cost calculator
Based on builder rates in SO18, Southampton.
The calculator gives you a range. For a real number tailored to your job, get free quotes from up to 5 verified builders serving SO18.
Domifyr lists 4 verified builders serving SO18 and the surrounding postcodes. All builders on Domifyr have been identity-verified and hold valid insurance. Certification status is displayed on every profile.
Typical hourly rates for builders in SO18 range from £35 to £55, with a callout fee around £75. Southampton rates sit mid-range for South Coast; extensions and conversions vary significantly with scope and finishes, marine climate affects external work scheduling. Fixed-price quotes are available for most standard work — request one through Domifyr for free.
| Job | Typical range |
|---|---|
| House extensions | £25,000–£85,000 |
| Loft conversions | £28,000–£65,000 |
| Garage conversions | £12,000–£28,000 |
| Structural alterations | £3,500–£18,000 |
| Bricklaying | £400–£850 |
| Groundwork and foundations | £5,000–£22,000 |
| Rendering | £35–£75 |
| New builds | £180,000–£450,000 |
Indicative ranges from market data — actual quotes vary by scope, access, materials, and timing. Request quotes through Domifyr for accurate figures.
Typical builders in SO18 charge £35–£55 per hour, with a callout fee around £75. Emergency callouts are typically 40% higher. Southampton rates sit mid-range for South Coast; extensions and conversions vary significantly with scope and finishes, marine climate affects external work scheduling.
Most builders in SO18 can quote within 24 hours for standard work. For emergencies (leaks, lockouts, no heating), expect a response in 1–3 hours.
Yes — all builders on Domifyr are identity-verified and insured. Certification status is displayed on every profile.
About the author
Senior Editor, Building & Renovation · 15years' experience · RIBA Part 1 & Part 2 qualified
RIBA-trained, now writes about UK extensions, loft conversions and planning. 15 years covering UK building regulations.