Cost of Single Storey Extension in Perth (2026)
If you're looking at single storey extension in Perth right now, you should be seeing quotes in the £1,655 to £2,945 range per m². That's based on current Perth and Kinross contractor rates and the wider UK market. Anything well outside those numbers is worth questioning before you sign.
About single storey extension in Perth
Perth is a small town of around 47,000 in Perth and Kinross. The housing is mostly a mix of stone-built period cottages, post-war council housing and small new-build estates typical of Celtic-fringe market towns. That matters: older properties usually mean more pipework, rewiring and retrofit surprises, while newer builds in districts like PH1, PH2 tend to be quicker jobs with standardised fittings. Local trade prices sit below the UK average. Lower contractor overheads and shorter distances across Perth and Kinross do most of the work.
Scottish pricing runs from Edinburgh (above average) to the Highlands (variable, often with long lead times). The trade bodies are different here — SELECT for sparkies, SNIPEF for plumbers, and the regulatory framework is Building Standards rather than Building Regulations. Doesn't usually slow jobs down, but the paperwork changes.
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 Perth
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 Perth?
- Ground conditions and foundation depth
- Glazing ratio (bi-folds, roof lights)
- Kitchen refit included
- Structural steels and knock-through
- Planning permission vs PD
Perth vs the UK average
Perth sits in the building & construction market at a cost multiplier of 0.92× the UK national average. That puts Perth single storey extension prices at £1,655–£2,945 versus the UK average of £1,800–£3,200 per m².
Single Storey Extension cost calculator — Perth
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 Perth
Compare prices from vetted, trade-body-certified professionals near Perth (PH1, PH2). 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 Perth?
Budget £1,655 to £2,945 per m² for single storey extension in Perth. Prices here are around 8% cheaper than the UK average. What moves a quote inside that range is mostly building contractor day rates in Perth and Kinross and the specific material list for your job.
How long does single storey extension take in Perth?
A straightforward single storey extension job in Perth 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 Perth?
A proper single storey extension quote in Perth 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 Perth than the UK average?
Single Storey Extension in Perth runs around 8% cheaper than the UK average. The UK-wide benchmark for this job is £1,800 to £3,200 per m²; Perth quotes tend to land between £1,655 and £2,945. Handy to know what the average actually looks like before you price round.
Do I need planning permission for single storey extension in Perth?
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 Perth and Kinross 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 Perth.