House Extension
in March
Compare quotes from vetted March extension builders for single-storey, double-storey and rear extensions. Transparent pricing from £17,500. Free, no-obligation quotes — results in 24 hours.
- Vetted, insured house extension specialists in March
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How Much Do House Extension Cost in March?
Real prices from completed projects in March 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 →March pricing note: Eastern England (Essex, Hertfordshire, Cambridgeshire, Suffolk, Norfolk) runs approximately 8–12% above the national average, influenced by proximity to London and strong demand in commuter towns. Prices shown are indicative ranges for March and Eastern. Always get at least 3 written quotes before committing to any builder.
House Extension Specialists Who Know March
March 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 March 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 March builders cover the full range of residential projects. Request your free quotes today and compare options before making any decisions.
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What March Homeowners Say About Our House Extension Specialists
Conservation-area sympathetic extension on our mid-terrace in March. Internal opening to the original kitchen kept narrow to keep the cooker corner usable. £73300 across 14 working weeks. Insurance copy of structural certificate filed with the deeds.
Compared four extension builders through BestBuilders for the March job. Final pick had a structural engineer on staff, not subcontracted. Three trades on site any given day but the foreman ran the schedule like clockwork. Quote was £88100, invoice came in £405 lower. Snags fully closed within 21 days of handover.
Past a year and the extension is the most-used part of the whole house. Builder we found via BestBuilders in March pointed out a better window position so the morning light hits the dining table. Total £68700. Insurance copy of structural cert filed with the deeds.
House Extension in March — FAQs
Plan Your house extension Project in March
Whether you're researching costs, checking planning rules, or comparing approaches before you commit, our editorial team has produced these guides to help March 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 March
We also connect homeowners with vetted house extension specialists in towns surrounding March.
Planning Your House Extension in March
Before you compare quotes, it's worth understanding the full UK price picture for house extension and how March 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 March
Find out whether your house extension needs planning permission in March, 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.