House Extension
in Kettering
Compare quotes from vetted Kettering extension builders for single-storey, double-storey and rear extensions. Transparent pricing from £16,500. Free, no-obligation quotes — results in 24 hours.
- Vetted, insured house extension specialists in Kettering
- Up to 3 free quotes — compare and choose with no pressure
- Transparent pricing, no hidden costs or surprise charges
- Work guaranteed, fully insured, trade-qualified contractors
How Much Do House Extension Cost in Kettering?
Real prices from completed projects in Kettering and the surrounding area. Costs vary by size, specification and access — use these as a starting guide, then get 3 free quotes for your specific project.
The most popular choice for UK terraces and semis. Adds a kitchen-diner or extra living space at ground level. Typically 3–5m deep, completed in 10–14 weeks.
Get quotes for this →Maximum space gain in a single build — adds a ground-floor room and a bedroom above. Strong ROI in most UK property markets. Requires full planning permission.
Get quotes for this →Ideal for terraced homes with a narrow side alley. Transforms a cramped kitchen into a full-width open-plan space. Often combined with a rear extension.
Get quotes for this →Costs depend on size, spec and access. The best way to know your exact price is to compare 3 quotes from vetted local specialists.
Get free quotes →Kettering pricing note: East Midlands building costs are broadly in line with the national average. Prices in Nottingham, Leicester and Derby are competitive, with good availability of vetted local contractors across the region. Prices shown are indicative ranges for Kettering and East Midlands. Always get at least 3 written quotes before committing to any builder.
House Extension Specialists Who Know Kettering
Kettering is one of the UK's most active home renovation markets. With a diverse range of properties across the area, from period homes to modern new builds, local builders need to be versatile, skilled, and reliable.
BestBuilders vets every builder in our Kettering network. We check for public liability insurance, relevant trade qualifications (CIOB, FMB, Gas Safe, NICEIC), and a minimum of five verified customer reviews before any builder can appear on our platform.
Whether you are planning a rear extension, a loft conversion, or a full kitchen renovation in Kettering, we will connect you with the right specialist within 24 hours. All quotes are free and there is no obligation to proceed.
Start My Free Quote →How It Works
Every Builder We Recommend Is:
What Kettering Homeowners Say About Our House Extension Specialists
Glazed rear extension on our 1990s semi in Kettering. 24m² rear with structural opening through to the existing kitchen and a steel beam above. £82540 across 14 working weeks. FMB-credentialed builder, structural calcs done in-house.
Compared four extension builders through BestBuilders for the Kettering job. Final pick included a 12-month aftercare visit as standard. Steel goalpost frame craned in on day 8, then fixed within 24 hours. Final invoice £62460 - within 2% of the original quote. Moved out for two weeks during the demolition and steel install, the rest was bearable.
Past 18 months and the engineered oak floor has bedded in beautifully. Builder we found via BestBuilders in Kettering reused the original chimney as a feature inside the new space - clever bit of design. Total £77940. Decided to stay rather than move - the extension solved the space problem entirely.
House Extension in Kettering — FAQs
Plan Your house extension Project in Kettering
Whether you're researching costs, checking planning rules, or comparing approaches before you commit, our editorial team has produced these guides to help Kettering homeowners make informed decisions about their house extension project.
House Extension Cost Guide
Detailed UK price ranges, regional adjustments and worked examples for house extension projects.
Read House Extension Cost Guide →All House Extension Specialists
Browse our nationwide network of vetted house extension contractors covering all 519 UK towns.
Browse House Extension Specialists →All Cost Guides
Compare prices across extensions, lofts, kitchens, bathrooms, roofing, driveways and solar projects.
View All Cost Guides →Planning your house extension project? Read these guides:
House Extension Near Kettering
We also connect homeowners with vetted house extension specialists in towns surrounding Kettering.
Planning Your House Extension in Kettering
Before you compare quotes, it's worth understanding the full UK price picture for house extension and how Kettering sits within it. The guides below cover average costs, what affects your quote, and how to choose a builder you can trust.
UK House Extension Cost Guide
Full price ranges, worked examples and the factors that move your quote — drawn from real project data across 519 UK towns.
Read the house extension cost guide →House Extension Across the UK
Browse house extension services nationwide, see what's typical in your region, and request quotes from any UK location.
Visit the UK house extension hub →Planning Permission for House Extension in Kettering
Find out whether your house extension needs planning permission in Kettering, what Permitted Development limits apply, and how rules differ in conservation areas, Article 4 zones, and listed-building settings.
Read the house extension planning rules →More homeowner resources: all UK building guides, cost guides, planning permission, comparisons, how-to guides and industry insights.