House Extension
in Brecon
Compare quotes from vetted Brecon extension builders for single-storey, double-storey and rear extensions. Transparent pricing from £14,500. Free, no-obligation quotes — results in 24 hours.
- Vetted, insured house extension specialists in Brecon
- 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 Brecon?
Real prices from completed projects in Brecon 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 →Brecon pricing note: South Wales building costs run 10–15% below the national average, making it one of the most affordable regions in the UK for home improvements. Cardiff and Newport are well-served by vetted local contractors. Prices shown are indicative ranges for Brecon and South Wales. Always get at least 3 written quotes before committing to any builder.
House Extension Specialists Who Know Brecon
Brecon has a thriving home improvement market driven by a strong local economy and a mix of Victorian terraces, post-war housing and contemporary developments. Finding the right builder is key to any successful project.
Every builder in our Brecon network is thoroughly vetted before joining BestBuilders. We verify insurance cover, check trade memberships with bodies such as the FMB and CIOB, and require a minimum of five real customer reviews.
From a small bathroom refurbishment to a major double-storey extension, our vetted Brecon builders cover the full range of residential projects. Request your free quotes today and compare options before making any decisions.
Start My Free Quote →How It Works
Every Builder We Recommend Is:
What Brecon Homeowners Say About Our House Extension Specialists
Two-storey side extension on our 1930s semi in Brecon. Glazed corner of the extension brings southerly daylight deep into the plan. £125400 fully turnkey, 18 weeks. Trial pit done day one to confirm foundation depth was workable.
Compared four extension builders through BestBuilders for the Brecon job. Picked the team that took the time to come back twice with revised drawings. Builder agreed staged payments against milestones - cash-flow clarity throughout. £74000 all-in over 13 weeks. EPC went up two bands thanks to the new spec.
Eighteen months on, the bi-folds open every weekend and have not dropped on the runners once. Builder we found via BestBuilders in Brecon pointed out a future planning issue and designed around it pre-emptively. Total £66600. Stamp duty saved by extending out rather than moving up.
House Extension in Brecon — FAQs
Plan Your house extension Project in Brecon
Whether you're researching costs, checking planning rules, or comparing approaches before you commit, our editorial team has produced these guides to help Brecon 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 Brecon
We also connect homeowners with vetted house extension specialists in towns surrounding Brecon.
Planning Your House Extension in Brecon
Before you compare quotes, it's worth understanding the full UK price picture for house extension and how Brecon 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 Brecon
Find out whether your house extension needs planning permission in Brecon, 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.