House Extension
in Eastleigh
Compare quotes from vetted Eastleigh 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 Eastleigh
- 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
Your details are private & never sold.
How Much Do House Extension Cost in Eastleigh?
Real prices from completed projects in Eastleigh 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 →Eastleigh pricing note: Southern England (Hampshire, Dorset, West Sussex) sits around 10–15% above the national average. Coastal locations and areas with restricted site access can attract additional charges from contractors. Prices shown are indicative ranges for Eastleigh and Southern. Always get at least 3 written quotes before committing to any builder.
House Extension Specialists Who Know Eastleigh
Eastleigh 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 Eastleigh 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 Eastleigh 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 Eastleigh Homeowners Say About Our House Extension Specialists
Found an excellent builder through BestBuilders for our extension project. The quote process was straightforward, the builder was professional throughout and the finished result exceeded our expectations.
We used BestBuilders to find a loft conversion specialist. Received 3 competitive quotes within 48 hours and the builder we chose delivered on time and on budget. Highly recommended.
Good experience overall. The kitchen renovation was completed to a high standard. Minor delays on materials but the builder kept us informed. Would use BestBuilders again.
House Extension in Eastleigh — FAQs
House Extension Near Eastleigh
We also connect homeowners with vetted house extension specialists in towns surrounding Eastleigh.