Chartered structural engineer calculations for every residential intervention in Westminster — steel beams, lintels, pad foundations, wall removals, loft floor joists, underpinning. Eurocode-compliant, Building Control-ready, fixed fee.
Chartered structural engineer calculations for every residential intervention in Westminster — steel beams, lintels, pad foundations, wall removals, loft floor joists, underpinning. Eurocode-compliant, Building Control-ready, fixed fee.
Housing stock in Westminster: Grand Georgian and Regency terraces in Belgravia and Pimlico; Victorian and Edwardian mansion blocks; heritage-rich townhouses throughout; very high listed building density.
Character: Heritage-first planning approach; listed buildings on almost every street; basement and rear extension policies particularly strict.
Article 4: Multiple Article 4 Directions — office-to-residential restrictions, HMO conversions, retail to residential in shopping zones.
Basement policy: Westminster basement policy restricts to single-storey, typically under 50% of rear garden footprint; lightwells and rooflights strictly controlled in conservation areas.
Steel beam (RSJ) and padstone design for opening up kitchens, knocking through reception rooms or creating open-plan layouts in your Westminster property.
Ridge beam, purlin, dormer framing and floor joist upgrade calculations — essential for every habitable loft in Westminster.
Pad, strip or trench-fill foundation design based on Westminster ground conditions, tree proximity and drain locations.
New window and door openings — steel, concrete or timber lintel specification with bearing calculations.
Sequential underpinning design, reinforced concrete slab and retaining wall calculations for Westminster basements.
Every calculation set is signed by a chartered structural engineer (CEng MIStructE or MICE) — accepted by all Building Control bodies.
Single planning or regs submission.
Planning + building regs + structural.
Listed, conservation, complex sites.
Direct answers to the questions Westminster homeowners ask every week about structural calculations.
Start a free quote →Our fixed fees for structural calculations in Westminster start at £350 for a single beam (wall removal) and £550–£1,050 for a full structural package (loft or extension). Complex basements and multi-storey interventions are quoted individually. All prices include chartered engineer sign-off.
Yes — removing or altering any load-bearing wall in your Westminster property requires structural calculations proving the replacement beam and supports can carry the loads. Building Control will not approve the work without chartered engineer-signed calculations. Even partition walls should be checked before removal.
We deliver structural calculations within 1–2 weeks of receiving the architectural drawings and site measurements. For urgent projects in Westminster, we offer a fast-track service (3–5 working days) at a small premium.
A structural survey is a condition assessment of the existing building — identifying defects, movement, subsidence. Structural calculations are engineering designs for new work — beams, foundations, loft steelwork. For most Westminster extension and loft projects, you need calculations (not a survey). We provide calculations; we can recommend surveyors if a condition survey is needed.
Yes — we offer standalone structural calculations for Westminster projects where you already have architectural drawings from another practice. Just send us the drawings and we quote a fixed fee for the engineering package. If you need both drawings and structural, our Complete package bundles them at a lower combined price.
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 Westminster 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 £1,575. {location}'s most space-efficient loft solution when PD-route dormers are blocked. Our chartered team designs mansards t...
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 £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 £350. MCIAT chartered.
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