House Extension
in Glastonbury
Compare quotes from vetted Glastonbury extension builders for single-storey, double-storey and rear extensions. Transparent pricing from £15,000. Free, no-obligation quotes — results in 24 hours.
- Vetted, insured house extension specialists in Glastonbury
- 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 Glastonbury?
Real prices from completed projects in Glastonbury 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 →Glastonbury pricing note: South West England (Bristol, Devon, Cornwall) varies significantly by location. Bristol prices sit near the national average; rural Devon and Cornwall can run 5–10% higher due to contractor travel costs and limited local trade availability. Prices shown are indicative ranges for Glastonbury and South West. Always get at least 3 written quotes before committing to any builder.
House Extension Specialists Who Know Glastonbury
Glastonbury 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 Glastonbury 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 Glastonbury, 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 Glastonbury Homeowners Say About Our House Extension Specialists
Glazed rear extension on our 1960s detached in Glastonbury. Pitched roof with two large rooflights, ceiling fan to the apex. Final cost £68800 fully fitted out. Snagging fully resolved within 14 days of completion.
Compared four extension builders through BestBuilders for the Glastonbury job. Final pick included a 12-month aftercare visit as standard. Permitted Development route confirmed via a Lawful Development Certificate before any digging. Came in at £52660 over 14 weeks, no surprise extras. Family of four lived in throughout - we managed.
Past 18 months and the engineered oak floor has bedded in beautifully. Builder we found via BestBuilders in Glastonbury specced higher-grade glazing than we asked for - winter heating bills are noticeably lower. Total £80040. Best decision we have made on this house.
House Extension in Glastonbury — FAQs
Plan Your house extension Project in Glastonbury
Whether you're researching costs, checking planning rules, or comparing approaches before you commit, our editorial team has produced these guides to help Glastonbury 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 Glastonbury
We also connect homeowners with vetted house extension specialists in towns surrounding Glastonbury.
Planning Your House Extension in Glastonbury
Before you compare quotes, it's worth understanding the full UK price picture for house extension and how Glastonbury 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 Glastonbury
Find out whether your house extension needs planning permission in Glastonbury, 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.