Hackney's most space-efficient loft solution when PD-route dormers are blocked. Our chartered team designs mansards that get approved in Hackney conservation areas — with heritage statements and planning officer negotiation built in.
Hackney's most space-efficient loft solution when PD-route dormers are blocked. Our chartered team designs mansards that get approved in Hackney conservation areas — with heritage statements and planning officer negotiation built in.
Housing stock in Hackney: Victorian terraces dominate; large post-war estates around Hackney Wick; Georgian fragments in De Beauvoir and Stoke Newington; new-build around the Olympic Park.
Character: Young demographic; high design-quality bar in planning; mansards routinely approved in rear-of-terrace positions within conservation areas following the Hackney design guide.
Article 4: Article 4 Direction covers HMO conversions borough-wide and office-to-residential in specific commercial zones.
We check against Hackney Council's mansard design guide and design to match the terrace.
Required for Hackney's conservation areas — demonstrates the mansard respects character and townscape.
Accurate photomontage showing how the mansard sits alongside neighbours — often decisive at Hackney Council committee.
Mansards invariably trigger Party Wall notices in Hackney's dense terraced streets. Structural package includes new ridge, tie beams, floor joists.
Full liaison with Hackney Council planning officer, committee representation if called in.
Part L thermal, Part B fire (critical on mansards), Part E acoustic separation.
Single planning or regs submission.
Planning + building regs + structural.
Listed, conservation, complex sites.
Direct answers to the questions Hackney homeowners ask every week about mansard roof extensions.
Start a free quote →Very often yes in Hackney. Rear mansards are routinely approved by Hackney Council where the design matches the terrace — including within conservation areas like De Beauvoir Town. A Heritage Statement and sensitive design following the borough's published guidance are essential for conservation area mansards.
A 70° front slope is typical for Hackney mansards — steep enough to maximise floor area while reading as a roof rather than a full additional storey. Front dormers should be small and symmetrical. Hackney Council's design guide (where published) takes precedence on detail.
Often yes, but Hackney Council favours applications supported by wider street precedents. Where mansards already exist nearby in Hackney, approval is far more likely. We review street precedents at the feasibility stage.
Our architectural fees for a Hackney mansard start at £1,575 (planning + building regs + structural + heritage statement). Typical Hackney build costs are £90,000–£150,000 depending on size, complexity and access.
Full-height — typically 2.3–2.5m ceiling from the new floor. Unlike a dormer, which gives partial head height, a mansard provides a complete additional storey within Hackney's victorian terraces dominate terraced context.
We cover all Hackney postcodes — {postcodes} — and have submitted mansard applications across the borough. Our heritage statement and design-and-access statement are included in every mansard package.
Hackney's victorian terraces dominate terraced stock is the natural context for mansard extensions — they were originally designed for Victorian and Edwardian rows. Feasibility depends on street precedent, conservation area status and party wall implications. We assess all three at the free site visit.
A mansard adds a full upper storey — typically 35–45m² of usable floor space. In Hackney this often converts a 3-bed house to 4 or 5 beds. The steep front slope (70°) and flat top read as a roof, not a full floor, which is why Hackney Council accepts them more readily than a simple box extension.
We cover every London borough with the same fixed-fee approach. If your property sits on a boundary, here are the neighbouring options.
We cover every architectural technology service in Hackney with one chartered team.
From £840. A fixed-fee, end-to-end service — measured survey, scaled drawings, Design & Access Statement where required, Planning P...
From £840. A construction-ready drawing package compliant with every Approved Document — Part A structure, Part B fire, Part L ther...
From £1,225. Every loft type across every Hackney roof line — dormer, mansard, hip-to-gable, L-shape, Velux. LDC or full planning rou...
From £1,225. The whole spectrum — rear extensions, side returns, wraparounds, double-storey, basement digs. Planning-led design with ...
From £995. Turn your unused Hackney garage into a bedroom, home office or open-plan kitchen-diner. Planning route assessment, full ...
From £1,950. Full architectural technology service for basement digs and cellar conversions in Hackney — structural underpinning desi...
From £350. Chartered structural engineer calculations for every residential intervention in Hackney — steel beams, lintels, pad fou...
From £540. Fixed-fee measured surveys across Hackney from £540 — floor plans, elevations and sections to ±3mm accuracy. Leica Disto...
From £450. End-to-end Party Wall Act 1996 service for Hackney — Section 1, 3 and 6 notices, schedule of condition surveys, party wa...
From £1,225. London's most popular loft type — the full-width rear dormer. Planning or Permitted Development route assessed for your ...
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Free quote in 60 seconds. Fixed fee from £1,575. MCIAT chartered.
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