030 Sonning, rear extension. Quoted £142k, final £142k, 15 of 16 weeks.
Design and build in Berkshire and south Oxfordshire, from £60k
Your extension at the price we quoted, finished on the day we said.
Stannard & Lowe design and build extensions, loft conversions and kitchen-led renovations across Berkshire and south Oxfordshire, from £60k. One firm does the drawings, planning and the build, for a fixed price and a finish date in writing.
Your answer appears here: whether we do it, a rough range, the weeks on site and the closest job we’ve finished.
The record
Every job with its quoted and final price and its planned and actual weeks.
| No. | Project | Quoted | Final | Weeks | Finished |
|---|---|---|---|---|---|
| 030 | Sonning rear extension, 38 m² | £142k | £142k | 15 of 16 | Sep 2026 |
| 029 | Wargrave kitchen and vaulted roof, 31 m² | £118k | £121k client added work | 14 of 14 | Aug 2026 |
| 028 | Caversham hip-to-gable loft, 2 bedrooms | £74k | £74k | 11 of 10 1 week late, we paid | Jul 2026 |
What you get in writing
- A fixed priceIt only changes if you change the job, and every change is priced before we do it.
- A finish dateIf we are late, we pay you £150 a week.
- One site managerSteve Pearce, every day, with his mobile in your contract.
- A 10-year warrantyFMB member 000000, TrustMark licence 0000000, 10-year insurance-backed warranty with the provider named in your contract (illustrative).
What clients say
4.9 from 96 Google reviews
“They told us in week one what could go wrong and what it would cost if it did. Nothing did.”
The Okafors · Wargrave kitchen · 11 Sep 2026
“A week late because of a steel delivery, and they paid us for it without being asked.”
Tom R. · Caversham loft · 29 Jul 2026
Questions people ask first
What does an extension cost here?
Usually £2,800 to £3,500 per square metre for a single-storey extension, plus 10 to 15% for design and approvals. The site visit gets you a fixed number.
Is the price really fixed?
Yes. You get a fixed price in writing before we start. It only changes if you change the job, and every change is priced and signed before we do it.
What if you finish late?
We pay you £150 for every week past the date in the contract. It has happened twice in our last 30 jobs, and each one is in our record with the reason.
Who will be on site?
Steve Pearce, our site manager, every day, on every job. His mobile number is in your contract.
Do you handle drawings and planning?
Yes. Jo does the drawings, the planning application and building control, so one firm is responsible from the first sketch to the last snag.
Are you insured, and is the work guaranteed?
FMB member, TrustMark registered, and every job carries a 10-year insurance-backed warranty (illustrative). Certificates come with your quote.
Anything else? Tap Ask a question for quick answers, or call us.
Where we work
Area
Reading, Wokingham, Henley-on-Thames, Twyford, Sonning, Caversham, Wargrave, Marlow and the villages between.
Office hours
Mon to Fri: 7.30am to 5pm
Saturday: site visits by appointment