Cost of Single Storey Extension in Havant (2026)
Expect to pay somewhere between £1,835 and £3,265 for single storey extension in Havant, per m². Hampshire prices are close to the UK average. Get at least three written quotes before committing, it's a 10 to 15 percent swing in either direction for not much effort.
What pushes single storey extension prices up in Havant
Havant is a small town of around 46,000 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 PO9 tend to be quicker jobs with standardised fittings. Local trade prices sit a little above the UK average, which tracks with Hampshire labour and material costs.
Havant edges a little above the UK average on single storey extension: budget £1,835 to £3,265 per m², supported by a smaller pool of local firms. 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.
A typical single storey extension job in Havant takes 10-16 weeks and lands between £1,835 and £3,265 per m²; the local rate edges a little 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.
Basic to complex single storey extension prices in Havant
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 Havant?
- Ground conditions and foundation depth
- Glazing ratio (bi-folds, roof lights)
- Kitchen refit included
- Structural steels and knock-through
- Planning permission vs PD
Havant runs 2% over the UK average for single storey extension
Havant sits in the building & construction market at a cost multiplier of 1.02× the UK national average. That puts Havant single storey extension prices at £1,835-£3,265 versus the UK average of £1,800-£3,200 per m².
Single Storey Extension cost calculator: Havant
Estimate based on live 2025 UK trade pricing. Always get 3 written quotes before committing.
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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 Havant?
Budget £1,835 to £3,265 per m² for single storey extension in Havant. Prices here are around 2% 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 Havant?
A straightforward single storey extension job in Havant 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 Havant?
A proper single storey extension quote in Havant 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 Havant than the UK average?
Single Storey Extension in Havant runs around 2% more expensive than the UK average. The UK-wide benchmark for this job is £1,800 to £3,200 per m²; Havant quotes tend to land between £1,835 and £3,265. Handy to know what the average actually looks like before you price round.
Do I need planning permission for single storey extension in Havant?
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 Havant?
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 Havant starts around £1,835, while a complex one can reach £4,080 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 Havant.
More building & construction in Havant: Kitchen Installation costs, Loft Conversion costs, Plastering (Per Room) costs, Wall & Floor Tiling costs.