Cost of Single Storey Extension in Farnborough (2026)
Farnborough quotes for single storey extension are landing between £2,070 and £3,680 per m² at the moment. Most jobs take 10-16 weeks. The three things that move the price most around Hampshire are ground conditions and foundation depth; glazing ratio (bi-folds, roof lights); kitchen refit included.
Single Storey Extension in Farnborough: above the UK average
Farnborough is a small town of around 65,000 in Hampshire. The housing is mostly period cottages, Edwardian villas and 1930s semi-detached housing alongside newer commuter developments. That matters: older properties usually mean more pipework, rewiring and retrofit surprises, while newer builds in districts like GU14 tend to be quicker jobs with standardised fittings. Local trade prices sit on the expensive side for UK trade work. That's mostly wage levels plus the cost of running a van and a yard in and around Hampshire.
Pricing for single storey extension here runs about 15% above the UK average, putting Farnborough quotes in the £2,070 to £3,680 band per m², with a smaller pool of local firms keeping things competitive. A lot of South East firms work both London and local jobs. Rates usually track London with a small discount, so you're rarely getting a bargain. Peak season runs May to September and good tradespeople can be three to four weeks out. Out of season is the time to price round.
Most single storey extension work in Farnborough runs 10-16 weeks, costing £2,070 to £3,680 per m²; the local rate runs about 15% above the UK average. Building jobs are labour-heavy, and materials have moved fast, brick, timber, steel, insulation and board are all 20 to 40 percent up on pre-2022. FMB and TrustMark are your best signposts for a proper builder. On anything bigger than a loft conversion, get a Building Control officer involved from day one; fixing non-compliance later costs a fortune.
Single Storey Extension price tiers in Farnborough (£2,070 to £3,680)
Simple rear extension with standard finish
Open-plan kitchen extension with bi-fold doors
Wrap-around or glazed extension with lantern roof and structural steels
What affects the price of single storey extension in Farnborough?
- Ground conditions and foundation depth
- Glazing ratio (bi-folds, roof lights)
- Kitchen refit included
- Structural steels and knock-through
- Planning permission vs PD
Farnborough runs 15% over the UK average for single storey extension
Farnborough sits in the building & construction market at a cost multiplier of 1.15× the UK national average. That puts Farnborough single storey extension prices at £2,070-£3,680 versus the UK average of £1,800-£3,200 per m².
Single Storey Extension cost calculator: Farnborough
Estimate based on live 2025 UK trade pricing. Always get 3 written quotes before committing.
Get 3 free quotes from local single storey extension specialists in Farnborough
Compare prices from vetted, trade-body-certified professionals near Farnborough (GU14). No obligation, takes about 2 minutes.
Get my free quotes- No obligation
- Takes 2 minutes
- Vetted tradespeople
- Insurance-backed
What's typically included in a single storey extension quote
- Foundations and drainage
- Brick and block shell
- Roof and glazing
- First and second fix
- Plaster and decoration
Frequently asked questions
How much does single storey extension cost in Farnborough?
Budget £2,070 to £3,680 per m² for single storey extension in Farnborough. Prices here are around 15% more expensive than the UK average. What moves a quote inside that range is mostly building contractor day rates in Hampshire and the specific material list for your job.
How long does single storey extension take in Farnborough?
A straightforward single storey extension job in Farnborough runs to 10-16 weeks. You can lose days to things outside the contractor's control: parts on backorder, awkward access, or a firm slotting your job around existing bookings. Ask for a start date and expected finish up front.
What's included in the price of single storey extension in Farnborough?
A proper single storey extension quote in Farnborough should cover: Foundations and drainage; Brick and block shell; Roof and glazing; First and second fix; Plaster and decoration. If any of those aren't itemised on your quote, push back and ask. A written guarantee with a clear warranty period is reasonable to expect on this kind of work.
Is single storey extension cheaper in Farnborough than the UK average?
Single Storey Extension in Farnborough runs around 15% more expensive than the UK average. The UK-wide benchmark for this job is £1,800 to £3,200 per m²; Farnborough quotes tend to land between £2,070 and £3,680. Handy to know what the average actually looks like before you price round.
Do I need planning permission for single storey extension in Farnborough?
Most rear extensions fall under Permitted Development (up to 6m terraced/8m detached with Prior Approval). Side extensions and Article 4 areas require full planning. If the property sits in a conservation area or is listed, ring Hampshire Council before you book anything in. It's a free call and saves a world of grief later.
How do I get a fair single storey extension price in Farnborough?
Get at least three written, itemised quotes so you can compare like for like, and tell each firm exactly the same brief. A basic single storey extension job in Farnborough starts around £2,070, while a complex one can reach £4,600 per m². Quotes near the bottom of that range usually mean a more basic spec, not a better deal, so check what's actually included before you choose on price alone.
See all single storey extension prices across the UK or browse all tradespeople costs in Farnborough.
More building & construction in Farnborough: Kitchen Installation costs, Loft Conversion costs, Plastering (Per Room) costs, Wall & Floor Tiling costs.