A house extension can transform your home, adding valuable living space. Costs cover foundations, structural work, roofing, glazing, internal fit-out, and connection to existing services. In Putney (SW15), costs reflect the area's Inner London market position, with a 5% premium over London averages.
Putney is a family-friendly riverside neighbourhood with a mix of Victorian terraces, Edwardian houses, and some larger detached properties. Its proximity to Richmond Park and the Thames makes it highly sought after.
| Specification | Price per sqm | Typical 25sqm Project | Includes |
|---|---|---|---|
|
Standard
Quality materials, clean design
|
£2,625 – £3,360 | £65,625 – £84,000 | All structural work, standard fixtures, full fit-out and decoration |
|
Premium
Designer brands, bespoke elements
|
£3,360 – £4,200 | £84,000 – £105,000 | Premium materials, designer fixtures, underfloor heating, smart controls |
|
Luxury
Finest materials, fully bespoke
|
£4,200 – £5,775 | £105,000 – £144,375 | Bespoke joinery, natural stone, top-tier appliances, architectural detailing |
Prices include VAT and are based on Putney (SW15) market rates. Prices reflect Inner London market conditions and local construction costs. Actual costs depend on site-specific factors. All prices are guide estimates for 2025.
Here's what a typical 25sqm house extension project would cost in Putney at each specification level.
Putney has several conservation areas including the Putney Embankment and West Putney. Riverside properties face additional flood risk planning requirements.
Key streets and roads in Putney include Lower Richmond Road, Putney Hill, Chartfield Avenue, Lytton Grove, Keswick Road. Properties in these locations often have specific architectural characteristics that influence renovation costs, including riverside flood risk for some properties, varied building stock requiring flexible approaches, good road access for construction, proximity to Richmond Park green space considerations.
Every house extension is unique. Let our RIBA chartered architects provide a detailed, no-obligation estimate tailored to your property and specification.
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