MCIAT chartered. Tower Hamlets planning experienced. 1 postcode covered: E1W.
This page covers one part of the borough. For the full picture — fees, timelines and the council's current position — read mansard roof extensions in Tower Hamlets.
Wapping is Georgian fragments, warehouse conversions. The dominant stock — georgian terraces, warehouse conversions — has specific constraints and opportunities for mansard roof extensions. Side returns sit better on bay-fronted Victorian terraces than on detached 1930s semis. Mansards work where the existing roofscape supports them. We design to the block, not the brochure.
Local context summary — Architectural Drawings London, MCIAT chartered

Most mansard roof extensions projects in Wapping fall under Permitted Development if the property is a house (not a flat), not listed, and not in a conservation area. Tower Hamlets has an Article 4 Direction — Article 4 for HMOs borough-wide; additional Article 4 covering office-to-residential in Canary Wharf and City Fringe. We confirm eligibility free at the site survey.
Construction cost is separate and depends on size, finish and structural complexity. For georgian terraces, warehouse conversions (typical of Wapping), expect £45,000–£85,000 build cost for a standard rear extension or loft, more for mansards or basements.
12–14 weeks from first call to Tower Hamlets Council planning decision. Site survey week 1, design weeks 2–3, validation 1–2 weeks, statutory 8-week determination.
Wapping is characterised by georgian terraces, warehouse conversions. We've delivered mansard roof extensions for every period represented here — the design choices vary significantly by stock.
Our first-time approval rate in Tower Hamlets is 98%. Pre-application advice from Tower Hamlets Council is built into our process when the case is borderline (conservation area, Article 4, listed).

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Every Wapping postcode district we draw in, the stock that dominates it and the authority that validates a mansard roof extension there. Wapping fees below are the statutory England rates for 2026, not mansard roof extension estimates.
| Postcode | Area | Dominant stock | What it means for a mansard roof extension |
|---|---|---|---|
| E1W | Wapping | Georgian terraces, warehouse conversions | A mansard roof extension at an E1W address in Wapping is determined by Tower Hamlets Council under its own Local Plan policies for Wapping. |
| E1 | Spitalfields | Georgian listed townhouses | Neighbouring Spitalfields, where mansard roof extension work is handled by the same Tower Hamlets Council case officers. |
| E1 | Whitechapel | Victorian terraces, post-war estates, new-build | Neighbouring Whitechapel, where mansard roof extension work is handled by the same Tower Hamlets Council case officers. |
| E2 | Bethnal Green | Victorian terraces, post-war estates | Neighbouring Bethnal Green, where mansard roof extension work is handled by the same Tower Hamlets Council case officers. |
| E3 | Bow | Victorian terraces, Georgian fragments | Neighbouring Bow, where mansard roof extension work is handled by the same Tower Hamlets Council case officers. |
| E1 | Mile End | Victorian terraces, post-war estates | Neighbouring Mile End, where mansard roof extension work is handled by the same Tower Hamlets Council case officers. |
| E14 | Canary Wharf | Modern apartments | Neighbouring Canary Wharf, where mansard roof extension work is handled by the same Tower Hamlets Council case officers. |
| E14 | Limehouse | Georgian and Victorian terraces, warehouse conversions | Neighbouring Limehouse, where mansard roof extension work is handled by the same Tower Hamlets Council case officers. |
| E14 | Poplar | Post-war estates, new-build | Neighbouring Poplar, where mansard roof extension work is handled by the same Tower Hamlets Council case officers. |
| E1 | Shadwell | Georgian fragments, post-war estates | Neighbouring Shadwell, where mansard roof extension work is handled by the same Tower Hamlets Council case officers. |
| E1 | Stepney | Victorian terraces, post-war estates | Neighbouring Stepney, where mansard roof extension work is handled by the same Tower Hamlets Council case officers. |
Roof pitch, wall build-up and plot depth change every few Wapping streets, and each one changes what a mansard roof extension can achieve at that address.
How designation changes a Wapping mansard roof extension: Tower Hamlets Council maintains 58 conservation areas, including Whitechapel Market, Fournier Street, Tredegar Square. Inside any of them a Wapping 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. Spitalfields sets the tone for Wapping casework.
What Article 4 removes near Wapping: Article 4 for HMOs borough-wide; additional Article 4 covering office-to-residential in Canary Wharf and City Fringe. Before pricing a mansard roof extension we check whether the E1W address is inside the mapped area, because Tower Hamlets Council draws the Wapping boundary street by street rather than across the whole of Wapping.
What Wapping is built from: Georgian in Spitalfields and Wapping; Victorian industrial conversions; extensive post-war social housing; modern high-density towers in Canary Wharf and Aldgate. High heritage value in pockets (Spitalfields, Wapping), mixed with substantial regeneration areas; active planning committee. That mix decides the mansard roof extension route in Wapping more than the postcode does, and it is what a Tower Hamlets Council case officer reads first. A householder application costs £548 paid to Tower Hamlets Council direct, with 8 weeks to a decision once validated.
Sources for this Wapping 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.
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