The whole spectrum — rear extensions, side returns, wraparounds, double-storey, basement digs. Planning-led design with detailed technical phase, ideal for edwardian villas in Queen's Park and Mapesbury typical of Brent.
The whole spectrum — rear extensions, side returns, wraparounds, double-storey, basement digs. Planning-led design with detailed technical phase, ideal for edwardian villas in Queen's Park and Mapesbury typical of Brent.
Housing stock in Brent: Edwardian villas in Queen's Park and Mapesbury; Victorian terraces in Kilburn and Harlesden; 1930s semi-detached in Wembley; post-war tower blocks in Church End.
Character: Highly diverse borough; Queen's Park and Mapesbury are heritage-controlled; Wembley is a major regeneration hub.
Article 4: Article 4 for HMO conversions in specific streets around Wembley and Harlesden.
Measured existing survey, photographic record, Article 4 and conservation check specific to Brent before we quote.
2–3 design options at concept stage — alternative layouts, glazing, roof forms.
Site location plan, existing and proposed plans, elevations, sections, D&AS where required.
Part L thermal, Part B fire, Part M accessibility, structural strategy.
Steel beam, foundation, lintel design. Chartered engineer sign-off.
Party Wall notices where needed; Thames Water Build Over Agreement where within 3m of a public sewer.
Single planning or regs submission.
Planning + building regs + structural.
Listed, conservation, complex sites.
Direct answers to the questions Brent homeowners ask every week about house extension drawings.
Start a free quote →Most standard extensions in Brent fall under Permitted Development — single-storey rear up to 3m (attached) or 4m (detached), side returns up to half the width of the house. However, Brent has Article 4 Directions that may remove these rights in specific streets, and flats, listed buildings and conservation areas always need full planning. We check PD eligibility before quoting.
Standard permitted development allows single-storey rear extensions up to 3m (attached house) or 4m (detached) in Brent. Larger extensions up to 6m/8m are allowed under Prior Approval (Class AA). Flats, listed buildings and Article 4 areas in Brent are excluded from these PD rights.
Our fixed-fee architectural package starts at £1,225 for a Brent extension (planning + building regs + structural). Typical Brent build costs are £2,400–£3,500 per square metre including VAT — so a 25m² side return extension is £60,000–£87,500 to construct.
Brent does not have a borough-specific basement policy beyond the national framework — basement conversions are generally permissible subject to structural, drainage and flood-risk considerations. Thames Water Build Over Agreements apply where you're within 3m of a public sewer.
Most Victorian terraces in Brent (particularly in Queen's Park) benefit from both — a side return extension infills the narrow side passage to create a wider kitchen, a rear extension projects back into the garden. A wraparound combines the two. We recommend the best option at the free site visit.
Brent's edwardian villas in Queen's Park and Mapesbury terraced and semi-detached stock typically suits rear single-storey extensions (kitchen-diners), side-return infill extensions, or double-storey rear. Wraparound extensions combine both directions for maximum gain. We recommend the most viable option at the free site visit.
We cover all Brent postcodes — {postcodes} — with local surveyors. Survey appointments within 3 working days. Fixed fees — no hourly billing.
Brent Council follows the London Plan and its own Local Development Framework. Extensions must match or complement existing materials, respect neighbour amenity and comply with Part L. We include a Pre-Application Advice summary where the planning history is complex.
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 Brent 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 Brent roof line — dormer, mansard, hip-to-gable, L-shape, Velux. LDC or full planning route...
From £1,575. Brent's most space-efficient loft solution when PD-route dormers are blocked. Our chartered team designs mansards that g...
From £995. Turn your unused Brent garage into a bedroom, home office or open-plan kitchen-diner. Planning route assessment, full bu...
From £1,950. Full architectural technology service for basement digs and cellar conversions in Brent — structural underpinning design...
From £350. Chartered structural engineer calculations for every residential intervention in Brent — steel beams, lintels, pad found...
From £540. Fixed-fee measured surveys across Brent from £540 — floor plans, elevations and sections to ±3mm accuracy. Leica Disto l...
From £450. End-to-end Party Wall Act 1996 service for Brent — Section 1, 3 and 6 notices, schedule of condition surveys, party wall...
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 £1,225. MCIAT chartered.
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