House Extension
in Newport
Compare quotes from vetted Newport extension builders for single-storey, double-storey and rear extensions. Transparent pricing from £14,500. Free, no-obligation quotes — results in 24 hours.
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How Much Do House Extension Cost in Newport?
Real prices from completed projects in Newport 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 →Newport 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 Newport and South Wales. Always get at least 3 written quotes before committing to any builder.
House Extension Specialists Who Know Newport
Newport 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 Newport 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 Newport, we will connect you with the right specialist within 24 hours. All quotes are free and there is no obligation to proceed.
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What Newport Homeowners Say About Our House Extension Specialists
Single-storey rear extension on our cottage in Newport. Foundations stepped over an existing drain run after a CCTV survey. Job done for £124000 over 16 weeks. Building Regs CC4 cavity-tray detail caught on inspection - no remedials.
Compared four extension builders through BestBuilders for the Newport job. Quotes ranged from £42k to £71k - went with the £58k mid-tier on detail. Trial pit confirmed foundation depth on day two, no over-engineering. Final figure £107160 across 15 working weeks. Estate agent valued the work at +£90k of property uplift.
Two years post-completion the extension still feels like part of the original house. Builder we found via BestBuilders in Newport recommended an in-floor zone control - underfloor heating runs only where needed. Total £86760. No need to move - the extension solved the family room problem entirely.
House Extension in Newport — FAQs
Plan Your house extension Project in Newport
Whether you're researching costs, checking planning rules, or comparing approaches before you commit, our editorial team has produced these guides to help Newport 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
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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 Newport
We also connect homeowners with vetted house extension specialists in towns surrounding Newport.
Planning Your House Extension in Newport
Before you compare quotes, it's worth understanding the full UK price picture for house extension and how Newport 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 Newport
Find out whether your house extension needs planning permission in Newport, 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.