Islington's most space-efficient loft solution when PD-route dormers are blocked. Our chartered team designs mansards that get approved in Islington conservation areas — with heritage statements and planning officer negotiation built in.
Islington's most space-efficient loft solution when PD-route dormers are blocked. Our chartered team designs mansards that get approved in Islington conservation areas — with heritage statements and planning officer negotiation built in.
Housing stock in Islington: Georgian and early Victorian terraces, Victorian bye-law housing, 1930s mansion blocks, converted industrial buildings in Clerkenwell and Farringdon.
Character: Densely terraced, gentrified; strong conservation area coverage; active planning department.
Article 4: Article 4 Direction covering the whole borough removes permitted development rights for HMO conversions (C3 to C4). Separate Article 4 for office-to-residential in key areas.
We check against Islington Council's mansard design guide and design to match the terrace.
Required for Islington's conservation areas — demonstrates the mansard respects character and townscape.
Accurate photomontage showing how the mansard sits alongside neighbours — often decisive at Islington Council committee.
Mansards invariably trigger Party Wall notices in Islington's dense terraced streets. Structural package includes new ridge, tie beams, floor joists.
Full liaison with Islington 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 Islington homeowners ask every week about mansard roof extensions.
Start a free quote →Very often yes in Islington. Rear mansards are routinely approved by Islington Council where the design matches the terrace — including within conservation areas like Barnsbury. 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 Islington 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. Islington Council's design guide (where published) takes precedence on detail.
Often yes, but Islington Council favours applications supported by wider street precedents. Where mansards already exist nearby in Islington, approval is far more likely. We review street precedents at the feasibility stage.
Our architectural fees for a Islington mansard start at £1,575 (planning + building regs + structural + heritage statement). Typical Islington 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 Islington's georgian and early Victorian terraces, Victorian bye-law housing, 1930s mansion blocks, converted industrial buildings in Clerkenwell and Farringdon terraced context.
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 Islington 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 {location} roof line — dormer, mansard, hip-to-gable, L-shape, Velux. LDC or full planning ...
From £1,225. The whole spectrum — rear extensions, side returns, wraparounds, double-storey, basement digs. Planning-led design with ...
From £995. Turn your unused {location} garage into a bedroom, home office or open-plan kitchen-diner. Planning route assessment, fu...
From £1,950. Full architectural technology service for basement digs and cellar conversions in {location} — structural underpinning d...
From £350. Chartered structural engineer calculations for every residential intervention in {location} — steel beams, lintels, pad ...
From £450. End-to-end Party Wall Act 1996 service for {location} — Section 1, 3 and 6 notices, schedule of condition surveys, party...
From £1,225. London's most popular loft type — the full-width rear dormer. Planning or Permitted Development route assessed for your ...
Free quote in 60 seconds. Fixed fee from £1,575. MCIAT chartered.
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