Drawings a builder can actually work from, tested against the Approved Documents that bite on a Richmond upon Thames house: A for structure, Part B for escape, L for heat loss, M for access. Structural calculations arrive with them, coordinated, and the whole set goes to LABC or to your approved inspector.
They can relax them. Approved Document L allows a historic or listed building to depart from the standard U-values where compliance would unacceptably alter its character — and with 85 conservation areas covering 3,172 hectares, Richmond upon Thames is where that provision is used most.
| Requirement | Standard for a new thermal element | Source |
|---|---|---|
| External wall | 0.18 W/m²K | Approved Document L, Volume 1 |
| Roof | 0.15 W/m²K | Approved Document L, Volume 1 |
| Ground floor | 0.18 W/m²K | Approved Document L, Volume 1 |
| Windows and doors | 1.4 W/m²K | Approved Document L, Volume 1 |
| Historic and traditional buildings | may depart where character would be harmed | Approved Document L, Volume 1 |
| Conservation areas in the borough | 85 covering 3,172 ha | planning.data.gov.uk |
Sources: Approved Document L, Volume 1: Dwellings (2021 edition, incorporating the 2023 amendments), including its provisions on historic and traditional buildings; conservation areas from planning.data.gov.uk, retrieved 1 September 2026, hectares computed from the published boundaries. Read at 1 September 2026. The relaxation is in the Approved Document itself and is not a local concession — but building control has to be persuaded of it case by case, in writing.
Building regulations drawings in Richmond upon Thames, a borough of Georgian in Richmond Green and Twickenham; Edwardian villas in Barnes and East Sheen; 1930s semi-detached in Whitton; riverside cottages along the Thames, are the full measured-survey-to-submission drawing set London Borough of Richmond upon Thames needs in order to determine an application: existing and proposed plans, elevations and sections at 1:100 and 1:50, a location and site plan, and the supporting statements the case officer asks for.
Prepared and reviewed by the architectural technologist team at Architectural Drawings London — CIAT Affiliate, professional indemnity insured.Last reviewed 2026-08-03.


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 Richmond upon Thames: Georgian in Richmond Green and Twickenham; Edwardian villas in Barnes and East Sheen; 1930s semi-detached in Whitton; riverside cottages along the Thames.
Character: Highest conservation area coverage in London; Royal Parks and Thames corridor add heritage layers; design quality heavily scrutinised.
Everything at 1:50 - plan, section, elevation - annotated far enough that a contractor prices it and builds it without phoning about a dimension that is not on the sheet. Materials are named, not left as a general note.
Element-by-element thermal figures: U-values covering the walls, the roof, the ground floor and every pane of glass, plus a SAP or SBEM run where the scheme calls for one, then a statement setting each figure against what the Approved Document demands.
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).
It goes in as a Full Plans application. Richmond Council or a private inspector - your builder usually has a preference - and we stay with the inspection sequence until somebody signs the completion certificate.

Single planning or regs submission.
Planning + building regs + structural.
Listed, conservation, complex sites.
Move the controls for an indicative figure. It anchors your budget — it is not a quote. Every project is priced after a site survey.
Build costs are separate and quoted by your contractor. See our published fees.
Each Richmond upon Thames postcode district we work in is listed below with the housing that characterises it and the body that validates a building control submission there. Any money shown is the statutory England planning application fee for 2026 - it is not the cost of a building regulations package.
| Postcode | Area | Dominant stock | What it means for a building regulations package |
|---|---|---|---|
| SW13 | Barnes | Georgian villas, Edwardian terraces | Barnes. Richmond Council decides SW13. The Victorian terraces here often have shallow foundations, which is the detail structural calculations for a rear opening have to address first. |
| SW14 | Mortlake / East Sheen | Edwardian villas, 1930s semi-detached | Mortlake and East Sheen. Richmond Council handles every SW14 building control submission, and long narrow rear plots here tend to push extensions into adjacent-excavation territory. |
| TW1 | Twickenham | Georgian fragments, Victorian terraces, Edwardian villas | Twickenham proper. TW1 goes to Richmond Council. Flat conversions are common in the centre, and work inside a flat needs building regulations approval even where nothing structural is touched. |
| TW2 | Twickenham / Whitton | Georgian fragments, Victorian terraces, Edwardian villas | Twickenham and Whitton. Richmond Council is the authority for TW2, and the inter-war semis that dominate here usually mean a party wall alongside whatever the building regulations submission covers. |
| TW9 | Richmond / Kew | Georgian terraces, Victorian villas | Richmond and Kew. Richmond Council validates TW9. Listed and near-listed frontages are frequent, and consent for the fabric is a separate application from the building control one. |
| TW10 | Richmond / Ham | Georgian terraces, Victorian villas | Richmond and Ham. TW10 falls to Richmond Council. Much of the older stock has solid walls, which changes both the insulation strategy and the Part L calculation behind it. |
| TW11 | Teddington | Edwardian villas, Victorian terraces | Teddington. Richmond Council validates TW11 submissions. A good share of the housing has already been extended once, so the existing structure has to be verified before a second intervention is designed onto it. |
| TW12 | Hampton / Hampton Hill | Georgian villas, Edwardian terraces, 1930s semi-detached | Hampton and Hampton Hill. Richmond Council decides it, applying the same Local Plan across TW12 as elsewhere in the borough; the low-lying ground near the river is where a floor build-up and damp detailing get scrutinised. |
Pitch, wall construction and how deep the plot runs vary street by street across Richmond upon Thames, and every one of those variables moves what a building regulations package has to detail at that particular address.
Conservation areas and building control are separate questions. Seventy-two areas are designated in the borough - Richmond Green, Ham Common and Barnes Village among the better known. Designation does not change the building regulations - a loft conversion in a conservation area needs the same fire, structure and insulation approval as one outside it. What designation changes is the planning route: permitted development rights are cut back, so work that would otherwise have gone through prior approval needs a full householder application instead. The householder application fee in England is £548. The fee for a larger householder prior approval is £249.
Richmond upon Thames permitted development status: there is no borough-wide direction from Richmond Council, so a building regulations package at a SW13 address is normally still permitted development. We certify that with a £274 Lawful Development Certificate rather than leaving a Richmond upon Thames sale to argue it later.
The building fabric around Richmond upon Thames: Georgian in Richmond Green and Twickenham; Edwardian villas in Barnes and East Sheen; 1930s semi-detached in Whitton; riverside cottages along the Thames. Highest conservation area coverage in London; Royal Parks and Thames corridor add heritage layers; design quality heavily scrutinised. A building regulations package in Richmond upon Thames is scoped against that stock first, because it decides whether the scheme runs as permitted development, a £274 Lawful Development Certificate, or a full £548 application to Richmond Council.
Sources for this Richmond upon Thames building regulations package page: borough policies maps and conservation-area registers (2025–26), Royal Mail postcode district boundaries, the Town and Country Planning (Fees for Applications) (England) Regulations, the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended, and the Party Wall etc. Act 1996.
The questions Richmond upon Thames owners bring to us about building regulations drawings, answered plainly.
Start a free quote →Two routes, one outcome. You can lodge the application with Richmond Council's own building control service or with a private approved inspector, and the completion certificate carries the same legal weight either way. We submit wherever the project and the builder are best served.
Scope sets the fee. A single-storey extension or a straightforward loft is the baseline; an HMO, a basement conversion or the splitting of one house into several flats demands a deeper set of details and far more coordinating, and prices accordingly. Structural work follows the intervention: sizing a single beam over a new opening sits nowhere near a full underpinning package in either effort or price. Fees are set out below.
Yes - a loft that becomes a habitable room needs building control approval anywhere in England, Richmond included, and the approval turns on escape in a fire, the strength of the new floor, insulation, and a staircase that meets the geometry rules. It runs on a separate track from planning permission: you can need one, the other, or both.
Part L is the energy chapter: insulation thicknesses, glazing performance, how airtight the envelope is, how efficient the heating is. A Richmond upon Thames extension now has to clear the 2025 uplift, the step before the Future Homes Standard proper. Every Complete package carries the Part L calculation and the statement that goes with it.
Richmond Council building control usually turns a Full Plans submission round in 5 to 8 weeks; a private inspector is quicker, more like 2 to 4. After that, expect somewhere between 6 and 10 site inspections spread across the build, depending on how much structural work is involved.
You need building control for a loft conversion, an extension of any size, structural alteration, a replacement roof, a new opening cut through a wall, and for practically anything done inside a flat. A handful of small jobs sit outside it, such as a like-for-like replacement or a modest porch. Which side yours falls on is settled at the free site visit rather than guessed at.
The completion certificate is what a conveyancer will ask for, and it comes from Richmond Council building control or from the approved inspector who signed the job off. Without it, a sale or a remortgage stalls. It is also where unauthorised work surfaces, and Richmond's planning enforcement runs comparatively light: 51 enforcement notices across 2023-24 to 2025-26, where the average London borough issued about 108, alongside 20 planning contravention notices and one breach of condition notice. Light-touch is not the same as safe, though - the buyer's solicitor asks the question the council never got round to. We run the inspections and close the certificate out in every Complete package. Source: MHCLG live planning statistics.
Change the thermal behaviour of a Richmond upon Thames house with an extension or a loft, and the EPC needs redoing. The SAP or SBEM run that demonstrates Part L compliance is the same calculation that feeds it. That calculation is part of the Complete and Bespoke packages.

If your property sits on a boundary, here are the neighbouring options.
Measuring up, detailing, sizing the steel, lodging it with building control: in Richmond upon Thames all four stay inside one CIAT-affiliated practice, and nobody hands your job across a gap.
Every loft type across every Richmond upon Thames roof line — dormer, mansard, hip-to-gable, L-shape, Velux. LDC or full planning route, bui...
The whole spectrum — rear extensions, side returns, wraparounds, double-storey, basement digs. Planning-led design with detailed technical p...
Richmond upon Thames's most space-efficient loft solution when PD-route dormers are blocked. Our team designs mansards that get ap...
Turn your unused Richmond upon Thames garage into a bedroom, home office or open-plan kitchen-diner. Planning route assessment, full buildin...
Full architectural technology service for basement digs and cellar conversions in Richmond upon Thames — structural underpinning design, wat...
Chartered structural engineer calculations for every residential intervention in Richmond upon Thames — steel beams, lintels, pad foundation...
Measured surveys across Richmond upon Thames — floor plans, elevations and sections to ±3mm accuracy. Leica Disto laser + BLK360 point-cloud...
End-to-end Party Wall Act 1996 service for Richmond upon Thames — Section 1, 3 and 6 notices, schedule of condition surveys, party wall awar...
London's most popular loft type — the full-width rear dormer. Planning or Permitted Development route assessed for your Richmond upon Thames...
Leave your number and an Architectural technologist will call you back within 30 minutes during working hours.
No obligation. No sales pressure. Just expert advice about building regulations drawings in Richmond upon Thames.
Free quote in 60 seconds. No hourly billing. CIAT Affiliate.
Get my free quote →