Cost of Single Storey Extension in Isle of Wight (2026)
Expect to pay somewhere between £1,890 and £3,360 for single storey extension in Isle of Wight, per m². Isle of Wight prices are noticeably above 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.
About single storey extension in Isle of Wight
Isle of Wight is a medium town of around 140,000 in Isle of Wight. 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 PO30, PO31, PO32 tend to be quicker jobs with standardised fittings. Local trade prices sit a little above the UK average, which tracks with Isle of Wight labour and material costs.
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.
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 cost breakdown in Isle of Wight
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 Isle of Wight?
- Ground conditions and foundation depth
- Glazing ratio (bi-folds, roof lights)
- Kitchen refit included
- Structural steels and knock-through
- Planning permission vs PD
Isle of Wight vs the UK average
Isle of Wight sits in the building & construction market at a cost multiplier of 1.05× the UK national average. That puts Isle of Wight single storey extension prices at £1,890–£3,360 versus the UK average of £1,800–£3,200 per m².
Single Storey Extension cost calculator — Isle of Wight
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 Isle of Wight?
Budget £1,890 to £3,360 per m² for single storey extension in Isle of Wight. Prices here are around 5% more expensive than the UK average. What moves a quote inside that range is mostly building contractor day rates in Isle of Wight and the specific material list for your job.
How long does single storey extension take in Isle of Wight?
A straightforward single storey extension job in Isle of Wight 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 Isle of Wight?
A proper single storey extension quote in Isle of Wight 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 Isle of Wight than the UK average?
Single Storey Extension in Isle of Wight runs around 5% more expensive than the UK average. The UK-wide benchmark for this job is £1,800 to £3,200 per m²; Isle of Wight quotes tend to land between £1,890 and £3,360. Handy to know what the average actually looks like before you price round.
Do I need planning permission for single storey extension in Isle of Wight?
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 Isle of Wight Council before you book anything in. It's a free call and saves a world of grief later.
See all single storey extension prices across the UK or browse all tradespeople costs in Isle of Wight.