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House Extension Cost Guide: Bristol & Bath (2026)
Plan Your 2026 Extension with Confidence
Stop guessing and start planning with the 2026 House Extension Cost Guide. This fluff-free roadmap gives you the real numbers for Bristol and Bath.
Takeaways
Investment Ranges: Single-storey projects typically cost £70k–£120k, while premium or multi-storey builds exceed £200k
Complexity Drivers: Costs are dictated by structural changes, ground conditions, and roof types.
Finish Quality: Premium interior choices can double your internal budget.
Hidden Costs: Budget early for "invisible" extras like structural engineering and party wall agreements.
Strategic Value: Renovating avoids "lost" moving costs like Stamp Duty and agent fees.
Financial Safety: Always use a clear scope and a contingency allowance to prevent surprises.
