A construction-ready drawing package compliant with every Approved Document — Part A structure, Part B fire, Part L thermal, Part M accessibility — submitted to LABC or your approved inspector with structural calculations coordinated.
A construction-ready drawing package compliant with every Approved Document — Part A structure, Part B fire, Part L thermal, Part M accessibility — submitted to LABC or your approved inspector with structural calculations coordinated.
Housing stock in Wandsworth: Extensive Victorian terraced streets — the classic London side-return extension opportunity; Edwardian villas around the commons; 1930s semi-detached in Southfields.
Character: Family-oriented, high side-return extension and loft conversion rates; planning department experienced with Victorian terrace modifications.
Article 4: Article 4 for HMO conversions covering the whole borough.
Plans, sections and elevations at 1:50 with full annotation and material specification.
U-values for walls, roof, floor and glazing; SAP or SBEM where required; compliance statement.
Chartered engineer sign-off on beams, pad foundations, lintels, roof structure.
Escape routes, compartmentation, smoke alarms, fire-rated construction detail.
Soil and vent pipe routes, MVHR coordination, EV charging (Part S).
Full Plans submission to Wandsworth Council Building Control or an approved inspector with inspections coordinated through to completion certificate.
Single planning or regs submission.
Planning + building regs + structural.
Listed, conservation, complex sites.
Direct answers to the questions Wandsworth homeowners ask every week about building regulations drawings.
Start a free quote →In Wandsworth, you can submit building regulations applications to either Wandsworth Council's in-house Building Control (LABC route) or to a private approved inspector. Both routes produce the same legally-valid completion certificate. We submit to whichever suits your project and builder.
Fixed fees in Wandsworth start at £840 for a straightforward extension or loft. Complex projects (HMOs, basement conversions, flat splits) range £1,500–£2,500. Structural calculations are £350–£1,050 depending on the intervention.
Yes — every habitable loft conversion in Wandsworth (and across England) requires Building Regulations approval covering fire escape, floor structure, insulation and staircase. This is independent of whether you also need planning permission.
Part L of the Building Regulations sets minimum energy-efficiency standards — insulation, glazing U-values, air permeability, heating efficiency. New extensions in Wandsworth must meet the 2025 uplift (Future Homes Standard transition). We include full Part L calculations and a compliance statement in every Complete package.
Once submitted, Wandsworth Council Building Control reviews Full Plans within 5–8 weeks. Approved inspectors typically review in 2–4 weeks. On-site inspections run through the build — typically 6–10 visits depending on scope.
In Wandsworth, building regulations are required for: loft conversions, extensions, structural alterations, roof replacements, new openings in walls, and any work to a flat. Some minor works (like-for-like replacements, small porches) are exempt. We confirm at the free site visit.
A completion certificate from Wandsworth Council Building Control (or an approved inspector) confirms your works comply with Building Regulations. It is essential for selling or re-mortgaging — lenders and conveyancers require it. We manage the inspection sequence and close out sign-off as part of every Complete package.
Extensions and loft conversions in Wandsworth that change the building's energy characteristics require an updated EPC (or SAP/SBEM calculation as part of Part L compliance). We include Part L calculations in every Complete and Bespoke package.
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 Wandsworth 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 £1,225. Every loft type across every Wandsworth 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 £1,575. Wandsworth's most space-efficient loft solution when PD-route dormers are blocked. Our chartered team designs mansards t...
From £995. Turn your unused Wandsworth 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 Wandsworth — structural underpinning d...
From £350. Chartered structural engineer calculations for every residential intervention in Wandsworth — steel beams, lintels, pad ...
From £540. Fixed-fee measured surveys across Wandsworth from £540 — floor plans, elevations and sections to ±3mm accuracy. Leica Di...
From £450. End-to-end Party Wall Act 1996 service for Wandsworth — 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 ...
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Free quote in 60 seconds. Fixed fee from £840. MCIAT chartered.
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