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 Muswell Hill (N10), costs reflect the area's Inner London market position, with a 5% premium over London averages.
Muswell Hill sits on one of London's highest points, offering panoramic views. The area has a fine stock of Edwardian houses, many with original features, and a distinctive Broadway shopping area.
| 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 Muswell Hill (N10) 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 Muswell Hill at each specification level.
Muswell Hill Conservation Area is one of London's finest examples of Edwardian suburb preservation. Original architectural details including decorative plasterwork and stained glass are strictly protected.
Key streets and roads in Muswell Hill include Queens Avenue, Tetherdown, Woodland Rise, Hillfield Park, Grand Avenue. Properties in these locations often have specific architectural characteristics that influence renovation costs, including clay soil on hillside requiring specialist foundations, Edwardian-specific conservation requirements, good construction vehicle access.
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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