Hackney · E5 · E8 · E9 · De Beauvoir
Dormer, L-shaped, hip-to-gable and mansard loft conversions for Hackney's Victorian terraces. We handle Hackney Council planning — including conservation areas and Article 4 — party wall notices and Building Regulations from first survey to final snag.
Dormers are everywhere on Hackney's Victorian rooflines — which leads many homeowners to assume their own loft will sail through under Permitted Development. Often it will. But a significant proportion of the borough sits within conservation areas covered by Article 4 directions: De Beauvoir's terrace grid in N1, London Fields and Broadway Market in E8, parts of Clapton in E5 and Well Street in E9. There, a full planning application is required and roof alterations are assessed closely for streetscene impact.
The first thing we do is establish which rules apply to your address — then tell you plainly which conversion type suits your roof, what Hackney will approve, and what it will realistically cost.
Indicative London ranges. Every roof is different — a free site survey gives you an accurate, itemised figure.
Want a personalised range first? Try our free Loft Conversion Cost Calculator.
We measure your roof void, check headroom and confirm whether your address falls in a conservation area or Article 4 zone.
Drawings, structural calculations and either a Certificate of Lawfulness or a full planning application to Hackney Council, managed for you.
Party Wall Notices served on both neighbours at least two months before work starts. Building Control applications and inspections handled throughout.
A typical rear dormer takes 8–12 weeks on site under a written JCT contract with staged payments. We finish with a full snagging walkthrough.
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It depends entirely on where you are. Outside conservation areas, most rear dormers fall under Permitted Development. But a significant proportion of Hackney — De Beauvoir, London Fields, Broadway Market, parts of Clapton and Well Street among others — sits within conservation areas with Article 4 directions that remove those rights, meaning full planning permission is required. We check your address at the free survey.
Typical London ranges in 2026: a basic rear dormer £45,000–£60,000, a dormer with en-suite £55,000–£70,000, an L-shaped dormer £60,000–£80,000 and a full mansard £75,000–£110,000.
Mansards, hip-to-gable conversions and any alteration to a chimney stack always require planning permission in a conservation area — they are never Permitted Development there. Many are still approved, but design quality and materials matter, and determination takes longer.
A rear dormer takes 8–12 weeks on site, plus 3–4 months of pre-construction: drawings, Building Regulations, Certificate of Lawfulness or planning application, and party wall notices.
Almost always, yes. Terrace lofts involve cutting into the party wall for steel beams, so Party Wall Notices must be served on both adjoining neighbours at least two months before work starts. We manage this as part of the project.
Want the deep dive? Read our full Hackney loft planning guide, the Mansard vs Dormer comparison and the Party Wall guide for lofts.
Free survey, straight advice, no pressure. If a loft conversion is not right for your house, we will tell you.
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