Trusted Builders
in Southampton
- Fully vetted and reviewed Southampton builders
- Extensions, kitchens, bathrooms, loft conversions & roofing
- Free quotes — no commitment required
- Work guaranteed, fully insured tradespeople
Your details are private & never sold.
What Our Southampton Builders Do
All services →Single-storey, double-storey, rear and side extensions built to your design.
Velux, dormer, hip-to-gable and mansard loft conversions in Southampton.
Full kitchen redesign, supply and fit by experienced Southampton kitchen fitters.
Luxury and budget bathroom installations. Full project management available.
Block paving, resin, tarmac and concrete driveways with fast turnaround.
New roofs, repairs, flat roofing and emergency call-outs in Southampton.
Why Choose BestBuilders in Southampton?
Home renovation activity in Southampton continues to grow year on year. The area's varied housing stock, from older stone-built properties to new-build estates, means there is always strong demand for skilled, experienced local builders.
Before any builder appears on our Southampton platform, we carry out a full vetting check covering public liability insurance, trade qualifications, company registration and verified customer feedback. Only builders who pass every stage are listed.
Our Southampton builder network covers extensions, loft conversions, kitchens, bathrooms, roofing, driveways and more. Get up to 3 free, no-obligation quotes within 24 hours and choose the builder that best fits your project and budget.
Start My Free Quote →Average Building Costs in Southampton
| Single-storey extension | £ 27,000 – £55,000 |
| Double-storey extension | £ 55,000 – £99,000 |
| Side Extension | £ 17,500 – £41,500 |
| Dormer loft conversion | £ 38,000 – £66,000 |
| Hip-to-Gable Conversion | £ 42,000 – £76,000 |
| Mansard Conversion | £ 48,000 – £92,000 |
| Budget Kitchen | £ 4,500 – £13,000 |
| Kitchen renovation | £ 8,000 – £27,000 |
| Premium Kitchen | £ 17,500 – £35,000 |
| Bathroom renovation | £ 4,000 – £16,000 |
| En-Suite Bathroom | £ 4,000 – £14,500 |
| Luxury Wet Room | £ 5,000 – £24,000 |
| Driveway | £ 2,000 – £11,000 |
| Resin Bound Driveway | £ 2,500 – £13,000 |
| Tarmac Driveway | £ 1,000 – £6,000 |
| Roof Repair | £ 1,500 – £5,500 |
| Roofing | £ 3,000 – £16,000 |
| Flat Roof | £ 2,500 – £13,500 |
Indicative prices for Southampton area. See full cost guides →
Southampton Homeowners Trust BestBuilders
Found an excellent builder through BestBuilders for our extension project. The quote process was straightforward, the builder was professional throughout and the finished result exceeded our expectations.
We used BestBuilders to find a loft conversion specialist. Received 3 competitive quotes within 48 hours and the builder we chose delivered on time and on budget. Highly recommended.
Good experience overall. The kitchen renovation was completed to a high standard. Minor delays on materials but the builder kept us informed. Would use BestBuilders again.