Extension Builder Cost in Fareham

Building an extension in Fareham is a significant investment, and costs vary widely depending on the type of build, materials, site complexity, and current market rates. As a prosperous South East location with strong housing demand, Fareham extension builders typically charge 15–25% above the national average. BizHub365 connects Fareham homeowners with vetted local builders who understand regional building regulations, ground conditions, and planning requirements—helping you compare quotes and find transparent, reliable professionals for your project.

Extension Builder Prices in Fareham

Service	Typical Cost	Unit
Single-storey extension (basic, 20 sqm)	£18000 – £28000	per project
Single-storey extension (mid-range, 30 sqm)	£28000 – £42000	per project
Double-storey extension (40 sqm)	£50000 – £75000	per project
Builders labour (general build)	£160 – £250	per day
Brickwork and blockwork (including materials)	£75 – £120	per sqm
Roof structure and covering	£100 – £180	per sqm
Internal fit-out (plasterboard, electrics, plumbing)	£120 – £200	per sqm

Prices are indicative averages for Fareham. Actual quotes will vary based on job specifics.

What Affects the Cost?

Several key factors drive extension building costs in Fareham. The foundation type and ground conditions—especially clay and chalk common in Hampshire—affect groundwork expense. Extension size, storeys, and design complexity significantly impact labour hours and material quantities. Planning permission and Building Control approval are usually required and add timescales. Material choices (brick type, insulation standard, roof finish) and supplier proximity affect material costs. Weather, site access, and existing structural work (e.g., removing walls) can increase timescales and complexity.

Money-Saving Tips

Obtain 3–4 detailed quotes from local Fareham builders to compare scope and pricing. Plan extensions to align with Building Control thresholds—smaller builds may have simpler approval routes. Source materials yourself if you have time; builders often add 10–15% markup. Schedule work during quieter seasons (November–February) when builders may offer competitive rates.

Frequently Asked Questions

Do I need planning permission for a Fareham extension?

Most single-storey extensions under certain size thresholds (typically 4 sqm for terraced, 8 sqm for semi-detached or detached) are permitted development and don't need planning permission. Double-storey, larger single-storey, and extensions in conservation areas usually require permission. Your builder should advise, and the local Fareham council website provides guidance. Building Control approval is always required.

How long does a typical extension build take in Fareham?

A single-storey 20–30 sqm extension typically takes 12–16 weeks from start to finish, including groundwork, structure, roof, and internal fit-out. Double-storey builds often take 20–28 weeks. Planning and Building Control approval can add 8–12 weeks before work starts. Delays may occur due to weather, ground conditions, or unforeseen structural issues.

What's included in a builder's quotation for an extension?

A detailed quote should cover groundwork and foundations, structural work (brickwork, steel if needed), roof structure and covering, windows and doors, electrical and plumbing rough-in, insulation, plasterboard, and final decoration. Clarify whether it includes Building Control fees (typically £400–£800), scaffolding, skip hire, and any structural engineer costs. Exclude items should be listed separately.

Why do extension costs vary so much between builders in Fareham?

Variation reflects differences in overhead, experience, and subcontractor costs. Established, experienced builders may charge more but offer warranties and quality assurance. Material sourcing, labour availability, and site-specific challenges (access, ground stability, neighbour proximity) also influence final price. Always compare like-for-like scope and timeline when evaluating quotes.

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