← All questions
🛠️ Buildingbuildingswanseacost

What are the costs for a house extension in Swansea?

swanseaAsked 2026-03-1961 views1 answers56 total votes

In Swansea, the cost for a house extension can vary significantly based on size, materials, and design. On average, homeowners can expect to pay between £1,200 and £2,000 per sq...

1 Answer
Sort by
56
Accepted
Helen CrossBuilding Specialist · 11 yrs
Accepted Answer2026-03-19

In Swansea, the cost for a house extension can vary significantly based on size, materials, and design. On average, homeowners can expect to pay between £1,200 and £2,000 per square metre in 2026. A typical single-storey extension may cost around £20,000 to £40,000, while a double-storey extension could range from £40,000 to £70,000. It's essential to hire certified professionals for these projects; look for builders who are registered with the Federation of Master Builders (FMB) or have NICEIC certification for electrical work, as this ensures compliance with safety regulations. Additionally, obtaining the necessary planning permissions is crucial before starting any construction. For local expertise, consider contractors who have experience with Swansea’s unique building regulations and styles.

Looking for professionals in your area? Find vetted providers on TradeMatch.

Need a Building in swansea?

Get 3–5 free quotes from verified, insured professionals. No obligation, no spam.

Get Free Quotes →