Mansard Roof Extensions in Putney

Which Putney postcodes does this mansard roof extension service cover?

Every Putney postcode district we draw in, the stock that dominates it and the authority that validates a mansard roof extension there. Putney fees below are the statutory England rates for 2026, not mansard roof extension estimates.

Which Putney neighbourhoods suit a mansard roof extension best?

Roof pitch, wall build-up and plot depth change every few Putney streets, and each one changes what a mansard roof extension can achieve at that address.

• Putney (SW15) — Edwardian terraces, riverside defines Putney, where edwardian terraces, victorian villas, mansion blocks set what a mansard roof extension can do. A mansard on a Victorian terrace almost always needs full planning permission across SW15. Any Putney mansard roof extension is validated by Wandsworth Council, with Putney Bridge the usual Putney reference point on the site plan.
• Near Putney: Earlsfield (SW18) — a mansard roof extension in Earlsfield starts from victorian terraces, and Earlsfield reads as Victorian terraced streets. A mansard on a Victorian terrace almost always needs full planning permission in SW18. Wandsworth Council assesses Earlsfield mansard roof extensions against its own Earlsfield character guidance, and the location plan we draw for Earlsfield references Earlsfield station.
• Near Putney: Southfields (SW18) — mansard roof extension work in Southfields means 1930s semi-detached, edwardian terraces. Southfields is 1930s semi-detached, grid plan. Edwardian parapets give a mansard a clean base line throughout SW18. Wandsworth Council decides the Southfields application, and Southfields station anchors the Southfields location plan.
• Near Putney: Tonsleys (SW18) — Victorian conservation area defines Tonsleys, where victorian terraces set what a mansard roof extension can do. A mansard on a Victorian terrace almost always needs full planning permission across SW18. Any Tonsleys mansard roof extension is validated by Wandsworth Council, with Tonsley Hill the usual Tonsleys reference point on the site plan.
• Near Putney: Nightingale Triangle (SW12) — Edwardian conservation area defines Nightingale Triangle, where edwardian terraces and villas set what a mansard roof extension can do. Edwardian parapets give a mansard a clean base line across SW12. Any Nightingale Triangle mansard roof extension is validated by Wandsworth Council, with Nightingale Lane the usual Nightingale Triangle reference point on the site plan.
• Near Putney: Roehampton (SW15) — a mansard roof extension in Roehampton starts from post-war estates, georgian villas, and Roehampton reads as Modernist post-war estates, Georgian fragments. Mansards read as original on Georgian terraces in SW15. Wandsworth Council assesses Roehampton mansard roof extensions against its own Roehampton character guidance, and the location plan we draw for Roehampton references Alton Estate.
• Near Putney: Clapham Junction (SW11) — Victorian terraces, transport hub defines Clapham Junction, where victorian terraces, mansion blocks set what a mansard roof extension can do. A mansard on a Victorian terrace almost always needs full planning permission across SW11. Any Clapham Junction mansard roof extension is validated by Wandsworth Council, with Clapham Junction station the usual Clapham Junction reference point on the site plan.

How do conservation areas and Article 4 affect a mansard roof extension in Putney?

How designation changes a Putney mansard roof extension: Wandsworth Council maintains 45 conservation areas, including Tonsley, Magdalen Park, Nightingale Triangle. Inside any of them a Putney mansard roof extension cannot rely on permitted development, and the route becomes a £548 householder application determined in 8 weeks rather than a £249 prior approval in 6 weeks. Nightingale Triangle sets the tone for Putney casework.

Putney and Article 4: Article 4 for HMO conversions covering the whole borough. A mansard roof extension planned at a SW15 address is checked against that direction first; Wandsworth Council publishes the Putney extent, and the SW15 line rarely follows the Putney boundary you would expect.

The building fabric around Putney: Extensive Victorian terraced streets — the classic London side-return extension opportunity; Edwardian villas around the commons; 1930s semi-detached in Southfields. Family-oriented, high side-return extension and loft conversion rates; planning department experienced with Victorian terrace modifications. A mansard roof extension in Putney is scoped against that stock first, because it decides whether the scheme runs as permitted development, a £274 Lawful Development Certificate, or a full £548 application to Wandsworth Council.

What happens if a Putney property sits on a boundary?

• Lambeth — adjoining Putney, with 64 conservation areas centred on SE1. A mansard roof extension on the far side of the Putney line is determined by Lambeth Council, so the Putney quote for mansard roof extensions is checked against Lambeth guidance before it is issued.
• Merton — the Merton boundary runs against Wandsworth, so a mansard roof extension a street from Putney is decided by Merton Council instead. Merton runs 28 conservation areas across SW16 and its neighbours, which is why mansard roof extensions priced for Putney are re-checked against Merton policy whenever the Putney address sits on that edge.
• Kingston upon Thames — adjoining Putney, with 22 conservation areas centred on KT1. A mansard roof extension on the far side of the Putney line is determined by Kingston Council, so the Putney quote for mansard roof extensions is checked against Kingston upon Thames guidance before it is issued.
• Richmond upon Thames — cross the Putney boundary and Richmond Council takes the mansard roof extension instead, applying 72 conservation areas of its own around SW13. We re-price mansard roof extensions at the Putney edge because Richmond upon Thames policy and Wandsworth policy rarely align on mansard roof extension depth.

Sources for this Putney mansard roof extension page: borough policies maps and conservation-area registers (2025–26), Royal Mail postcode district boundaries, the Town and Country Planning (Fees for Applications) (England) Regulations, the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended, and the Party Wall etc. Act 1996.