Whether you are looking to capture those stunning sea views or simply need a larger kitchen for family life, a home extension is one of the most rewarding investments you can make. However, as anyone who has lived in Teignmouth knows, our coastal geography—with its sloping sites and unique ground conditions—means that no two projects are ever the same.
Hi, I’m Steve, the owner of South Devon Construction. I’m Devon born and bred, and I’ve spent over 25 years in the building trade. With a Level 7 Diploma in Construction Management and a Level 3 in Quantity Surveying and Cost Estimation, I take the guesswork out of building. At South Devon Construction, we pride ourselves on honesty and integrity; I won’t give you a “back-of-an-envelope” figure when I know that quality and safety require a professional calculation.
Here is a breakdown of what you can expect when budgeting for an extension in the Teignmouth and Newton Abbot area in 2025.
Ballpark Figures: The Cost Per Square Metre
In 2025, for a high-quality extension in South Devon, you should budget between £1,800 and £3,000 per m² (excluding VAT and professional fees). The final price depends heavily on the specification and the complexity of the build.
-
Standard Build (£1,800–£2,200/m²): A straightforward rectangular design with standard uPVC windows, modest interior finishes, and simple roofing.
-
Good Quality (£2,200–£2,600/m²): A more complex footprint involving better insulation, higher ceilings, or aluminium bi-fold doors.
-
Premium Build (£2,600–£3,000+/m²): A high-spec transformation featuring architectural glazing, high-end kitchen fittings, or specialist materials like natural stone or bespoke leadwork.
Factors Unique to Teignmouth
As a local builder, I’ve seen how our coastal location affects the “hard graft” and the final bill:
-
Groundworks and Slopes: Many properties in Teignmouth are built on hills. Sloping sites require more complex foundations and muck-away, which can add several thousand pounds to the initial groundworks stage.
-
Coastal Exposure: Being near the sea means we recommend marine-grade fixings and high-performance renders (like K-Rend) that won’t flake or corrode in the salt air.
-
Access: If your property is in one of the narrower lanes or has limited driveway space, the logistics of getting materials and machinery on-site can influence the timeline and cost.
The “Hidden” Costs to Budget For
When I provide a cost estimation, I always ensure my clients see the full picture. Beyond the bricks and mortar, remember to account for:
-
Professional Fees: Architects, structural engineers, and surveyors typically charge 10–15% of the build cost.
-
Statutory Fees: Planning permission (approx. £258) and Building Regulations inspections (approx. £300–£600).
-
Kitchens and Bathrooms: A new kitchen extension can add £15,000 to £35,000 to your total, depending on your choice of appliances and worktops.
-
Contingency: I always advise a 10% contingency fund. In 25 years, I’ve learned that even with the best planning, the ground can always throw a surprise!
A Seamless and Stress-Free Construction Experience
At South Devon Construction, we offer a tailor-made approach. Whether we are acting as Principle Contractors for a major multi-storey extension or I’m working with my small team of local professional tradesmen on a smaller wrap-around project, our commitment to quality never wavers. We manage the architects, the structural engineering, and the building control, providing you with a single, honest point of contact.
Ready to get an accurate price for your Teignmouth extension?
I’ve seen a lot of builds, and I know that a successful project starts with a transparent budget. I’d be happy to use my 25 years of experience and my surveying background to provide you with a detailed, professional cost estimation for your specific site.
Would you like me to visit your property to discuss your ideas and provide a realistic, professional breakdown of the costs for your upcoming extension?