Detached House Extension Shortlist near KT2 7TU

Researched on 25 Apr 2026. This list prioritises companies serving Kingston/Surbiton/New Malden/Twickenham/Worcester Park/West Molesey (roughly within 5 miles of KT2 7TU).

10 shortlisted firms Extension-capable Planning support: explicit or indicated

My ranked recommendation (best first)

Ranking logic: explicit planning-permission capability, review quality/volume, proven extension track record, and local relevance to KT2.

  1. Thames Design & Build Ltd Best overall fit
    Why #1: strong and specific planning/design scope, very high Checkatrade score (10/10, 83 reviews), long operating history, and close-area delivery experience (including KT2 jobs).
  2. Plus Rooms Strong design-build option
    Why #2: clear end-to-end planning and build process in-house, high review volume on Houzz, and regular Kingston-area delivery.
  3. AMT Construction Ltd High-trust local contender
    Why #3: clear planning/project-management language, good local coverage, and strong review quality. Slightly lower review volume than #1-#2.

If you want the safest route: invite these top 3 for site visits first, then benchmark the rest against their quotes and planning scope.

At-a-glance comparison

Tip: start with the first 4-5 where planning support is most explicit, then ask each for a fixed-fee pre-construction scope (design + planning + build programme).

# Company Primary area / proximity Review evidence How long in business Planning-permission support Website Contact details Best person to contact
1 Thames Design & Build Ltd Thames Ditton / KT6-KT10 corridor (near KT2) Checkatrade: 10/10 (83 reviews)
Reviews link 		Established 2011; 12 years on Checkatrade Explicit Planning consultants and planning/design listed; advises on permissions. thamesdesignandbuild.com 020 8398 9252
info@thamesdesignandbuild.com		 Robert Allison (Owner)
2 AMT Construction Ltd Worcester Park / covers Kingston & Surbiton TrustATrader: 4.95/5 (6 reviews)
Reviews link 		Over 20 years experience (site); incorporated 2024 Explicit States project management includes planning and permissions. amtconstruction.co.uk 020 8166 1981 / 07951 640 587
info@amtconstruction.co.uk		 Marc (named in reviews)
3 Plus Rooms Serves Kingston-upon-Thames projects Houzz: 4.8/5 (156 reviews)
Reviews link 		Listed as an established design-and-build firm Explicit States in-house management from design + planning permissions to build completion. plusrooms.co.uk 0800 917 7127 / 01923 848 558
plus@plusrooms.com (also seen: kate@plusrooms.com)		 Pre-planning / project co-ordinator team
4 SKC Services Ltd (Sam Klue Construction) Twickenham + Kingston coverage Company reviews page + case studies
Reviews link 		Years in business not clearly stated on captured page Explicit Lists planning permission applications and building-regs support in extension services. samklueconstruction.com 020 8226 4897
contact@samklueconstruction.com		 Extensions surveyor / callbacks team
5 Berrylands Brickwork Surbiton (very close to KT2) TrustATrader: 4.95/5 (26 reviews)
Reviews link 		Over 9 years (TrustATrader profile) Likely Extensions/conversions experience; confirm if they handle planning applications end-to-end. berrylandsbrickwork.com 07834 272615
berrylands.brickwork@outlook.com		 Sonny Thatcher (Owner)
6 Eagle Eye Building Ltd New Malden (close to KT2) TrustATrader: 5.0/5 (14 reviews)
Reviews link 		Incorporated 2023 (Companies House) Likely Handles extensions and full structural works; confirm direct planning-management scope. eagleeyebuilding.co.uk 07846 887449
Email via TrustATrader form		 Callum (named in reviews)
7 The Green Building Services (Twickenham) Ltd Twickenham / Middlesex-Surrey-London TrustATrader: 4.95/5 (7 reviews)
Reviews link 		Over 40 years experience (profile) Likely Extension/conversion specialist; check who prepares and submits planning package. thegreenbst.co.uk 020 8945 5513 / 07813 803116
thegreenbst@gmail.com		 Cassian Angus (Owner)
8 The Bleu Group Worcester Park / SW London projects TrustATrader: 4.89/5 (31 reviews)
Reviews link 		Trading for many years; verified on platform since 2017 Likely Strong extension + loft portfolio; confirm planning-application handling at quote stage. TrustATrader profile 07308 503580
Email via TrustATrader form		 Toby Webber (Owner)
9 Renovate Space Ltd West Molesey / covers Kingston and Richmond TrustATrader: 5.0/5 (5 reviews)
Reviews link 		Over 20 years experience (site/profile) Likely Design/build examples and extension delivery; confirm if they submit planning paperwork directly. renovatespaceltd.com 07880 495639 / 07307 288736
jamie@renovatespaceltd.com		 Jamie (named in testimonials)
10 Riga Interiors Ltd Worcester Park / London & surrounds TrustATrader: 4.76/5 (149 reviews)
Reviews link 		Incorporated 2003 (long operating history) Likely High-volume extension/structural work; confirm planning consultant + submission responsibility. rigainteriors.co.uk 07841 114286
office@rigainteriors.co.uk		 Vitaliy (named in reviews)

How to use this shortlist

1) Send the same brief to all 10
Detached house extension in KT2 7TU, desired size/spec, budget range, and target start date.
2) Ask a planning-specific question
"Do you handle planning drawings, application submission, and council queries in-house?"
3) Request fixed pre-construction pricing
Separate costs for design/planning stage vs build stage, with clear exclusions.
4) Compare like-for-like
Same scope, same quality level, same programme assumptions before comparing quotes.

Important notes

- Review counts/ratings can change over time.
- "Likely" planning support means extensions and project-management capability are clear, but you should confirm full planning submission responsibility in writing.
- Distances are practical local-area estimates based on office location and/or service area, not exact route-mile calculations from each depot.