Extensions · Single & Double Storey · Kent
Add the kitchen-diner, master suite or family room you actually need, designed, engineered and built by one local team, on a fixed price and a written programme.
Fully insured to £5m · Company No. 15948972 · Free on-site survey · Building Control managed
Service overview
Plain-English breakdown, so you know exactly what you're paying for and why it matters before we set foot on site.
Single-storey rear and side extensions, wrap-arounds and double-storey extensions across Tunbridge Wells, Tonbridge, Sevenoaks and the wider Kent area. Foundations to finishes, groundworks, steels, blockwork, roofing, glazing, plastering, electrics, plumbing and decoration co-ordinated by one contractor.
Families outgrowing the house but staying for schools, homeowners adding a kitchen-diner with bi-folds, and buyers extending a recent purchase before moving in.
Planning permission or Permitted Development drawings in hand and ready to price; structural engineer's calcs prepared; or at the architect stage and you want a builder costing it in parallel.
Extensions live and die on the steels, the foundations and the roof tie-in. We trial-pit, size the structure correctly, and sequence trades so the build runs to programme, not to weather and luck.
The cost of doing nothing
Most extensions overrun on time and budget for the same handful of reasons, and almost all of them are avoidable at survey stage.
Our process
Same system every time. No improvising on your floor.
We walk the site, take measurements, review your drawings and discuss how you want to use the space day to day.
Itemised quote within 48 hours covering structure, trades, materials, programme and exclusions, no vague PC sums.
Building Control submission, Party Wall notices where needed, structural engineer sign-off and a confirmed start date in writing.
Single site supervisor, weekly progress reports, daily clean-down and one WhatsApp thread for every decision.
Building Control completion certificate, snagging walk, warranties registered in your name and a 1-year Spectrum workmanship guarantee.
What you get
No managing nine trades or chasing VAT receipts after handover.
Variations are quoted and signed before any extra work begins.
Structural calcs and trial pits, not guesswork on the trowel.
Dust sheets, protected floors and neighbours kept informed, the house stays liveable.
Building Control sign-off plus a 1-year workmanship guarantee in writing.
Recent finished extensions you can visit in TN, TN2 and TN4 postcodes.
In depth
The details a salesperson skips. Skim it, or read every word, both are useful.
The most common Tunbridge Wells extension, a 3–6m rear or side-return adding a kitchen-diner with bi-folds, a utility and often a downstairs WC. We handle groundworks, steel beams sized by a structural engineer, blockwork to match existing courses, flat or pitched roof with appropriate insulation, large-format glazing, underfloor heating, electrics, second-fix joinery and decoration. Typical programme 10–14 weeks.
Double-storey extensions add a bedroom and en-suite above a downstairs reception. Wrap-arounds combine rear and side returns for transformational ground-floor remodelling. Both require careful tying-in to the existing roof, party walls and drains, we survey thoroughly so the quote stands up once we break ground. Typical programme 14–20 weeks.
We work to your architect's drawings, file Building Regulations applications, book inspections at each key stage (foundations, DPC, drains, structure, insulation, completion) and obtain the completion certificate. Where works fall under Permitted Development we'll advise and apply for a Lawful Development Certificate so the extension is documented for resale.
Costs vary by size, spec and complexity. Quotes are free. After a free on-site survey you'll receive a fixed itemised written quote, we aim for a 48-hour turnaround.
Ready when you are
Fixed written quote. Insured tradesmen. No upsell, no pressure.
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