Richmond upon Thames · TW1 · TW2 · TW9
House Extensions in Richmond upon Thames
Affluent south-west borough — premium kitchen extensions and full renovations dominate. Single and double-storey extensions delivered as a fixed-scope design and build package.
Postcodes covered
Quick answer
Builderr delivers single-storey, double-storey and wraparound extensions across Richmond upon Thames — TW1, TW2, TW9, TW10 and KT2. Typical Richmond extension cost £65,000–£200,000 over 12–24 weeks. East Sheen, Hampton and Teddington 1930s semis take wraparounds well; conservation-area terraces in Richmond, Twickenham and Kew need full planning with heritage-grade materials. The Richmond Local Plan favours contemporary additions that defer to the existing facade.
Richmond's conservation areas include Richmond Green, Petersham, Strawberry Hill, Twickenham Riverside and Kew Green. Pre-app advice is recommended on any external alteration within these zones.
Richmond upon Thames
House Extensions specialists across Richmond upon Thames.
We deliver house extensions projects across the full Richmond upon Thames postcode set — TW1, TW2, TW9, TW10, TW11, KT2. Affluent south-west borough — premium kitchen extensions and full renovations dominate.
Every Richmond upon Thames project includes a free desk-based planning assessment before we quote, so you know upfront whether permitted development, prior approval, or full planning applies to your specific address. Our local project manager for Richmond upon Thames has detailed knowledge of the planning department's preferences, the conservation area boundaries, and the common construction details for the prevailing housing stock here.
Quotes for Richmond upon Thames house extensions are fixed-scope after a site survey, valid for 60 days, and never carry provisional sums or open-ended day rates. Every project includes our 10-year structural warranty and 12-month defects period.
Planning in Richmond upon Thames
Local planning rules for house extensions in Richmond upon Thames.
Richmond's conservation areas cover the vast majority of the borough including Richmond Hill, Richmond Green, Kew Green, Petersham, Twickenham Riverside, St Margarets, Teddington and East Sheen. The Thames riverside is additionally protected by the Thames Policy Area. Richmond planners maintain strict design standards requiring matching materials, sash windows and traditional brick detailing. Pre-application advice is essential. Basement conversions in Richmond Hill follow the council's Basements SPD.
Our planning team handles the full submission for Richmond upon Thames addresses including drawings, Design and Access Statements where required, and pre-application consultation with the council. We tell you whether your house extension is permitted development, prior approval, or full planning before you sign anything.
Builderr vs other London builders.
The construction industry has a wide distribution of operators. Here's what changes between a directly-employed, fixed-scope outfit and the alternatives.
| Criterion | Builderr | Typical London builder | Cowboy outfit |
|---|---|---|---|
| Labour model | Directly employed team (PAYE) | Mixed subcontract gangs | Day-rate cash labour |
| Pricing | Fixed-scope itemised quote | Estimate + provisional sums | Verbal price + variations |
| Design & engineering | In-house architect + SE | Outsourced, separate billing | Builder draws on the back of an envelope |
| Planning + LDC handled | Yes — included in price | Often charged extra | Builder asks you to apply |
| Party wall surveyors | Instructed by us | Your responsibility | Skipped (illegal) |
| Building control | Plans + site inspections booked by us | Building Notice route | Not registered |
| Project management | Dedicated PM, weekly photo updates | Foreman doubles up | Owner-manager juggles 5 jobs |
| Payment schedule | Stage payments against signed-off milestones | Weekly invoices | Cash up front |
| Insurance | £10M PL + 10yr structural warranty | £2–5M PL only | No documented cover |
| Snags at handover | <3 typical | 20–30 typical | Walk-off mid-job common |
| Variation creep | 0% — fixed scope | +15–25% over original quote | +40%+ regularly |
Save £27,000–£60,750 on a house extension in Richmond upon Thames.
Industry data (FMB, RICS, Which? Trusted Trader 2024) shows the average London construction project overruns by 18–22% on cost and 25–35% on time. Fixed-scope contracts with a single accountable team eliminate that variance. The savings above assume a typical project at £135,000.
FAQ
House Extensions in Richmond upon Thames.
How much does a house extension cost in Richmond upon Thames?
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Most house extensions projects in Richmond upon Thames cost £50,000–£220,000 depending on size, spec and structural complexity. Inner London postcodes typically sit toward the upper end; outer borough projects trend mid-range. All Builderr Richmond upon Thames quotes are fixed-price with no provisional sums.
Do I need planning permission for a house extension in Richmond upon Thames?
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Planning rules vary across Richmond upon Thames. We check permitted development eligibility, conservation area status and any Article 4 directions affecting your specific postcode before quoting. Many house extensions fall under permitted development, but conservation areas and listed buildings need full planning.
How long does a house extension take in Richmond upon Thames?
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Typical timeline is 10–20 weeks on site, plus 4–8 weeks for design, structural engineering and approvals. If full planning is required (conservation areas, mansards, larger extensions), add 8–12 weeks for the planning decision before site start.
Do you have house extension references in Richmond upon Thames?
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Yes — we maintain a live reference list for Richmond upon Thames and can connect you with two or three completed clients within the borough. We've delivered projects across nearly every Richmond upon Thames postcode since 2022, so most prospective clients can visit a completed project nearby.
What's included in a Builderr house extension quote in Richmond upon Thames?
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Every Richmond upon Thames quote covers structural design, party wall notices and surveyor coordination, planning or prior approval submission where required, building control, full build, snagging and a 10-year structural warranty. Kitchen units, sanitaryware and bespoke finishes are itemised separately so you can flex spec without losing fixed-price certainty on the build.
Other services in Richmond upon Thames
Get a Richmond upon Thames house extension quote.
Senior consultant call within one business hour. Free desk-based planning assessment for TW1, TW2, TW9 and surrounding postcodes. Fixed-scope price — no provisional sums.
