Rear Extension Costs in Trowbridge
Extension at the rear of the property - local pricing for Wiltshire.
Mid-range rear extension • per project • 8-14 weeks
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Adjust the sliders below to reflect your project. Each factor is based on what typically affects rear extension costs in Trowbridge.
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Get Accurate Local Quotes →Slider figures are indicative guides only, not formal quotes. Final costs depend on site surveys, specifications, and contractor pricing.
About Rear Extension in Trowbridge
Rear Extension in Trowbridge needs careful cost planning. If you're a homeowner looking to enhance your property, our clear pricing guide helps you budget effectively.
The typical cost for Rear Extension in Trowbridge falls between £21,000 to £47,250. Keep in mind, actual costs are influenced by multiple considerations.
What's Included
- Design and planning application
- Foundations and floor slab
- Wall construction
- Roof installation
- Bi-fold or patio doors
- Electrical and plumbing
- Internal finishing
Price Factors
Understanding why prices fluctuate enables you to assess quotes effectively. In Trowbridge, tradesperson rates, supply chains, and job requirements all impact pricing.
The sliders in the estimate calculator above map to these factors — move each one to match your project.
- Projection depth
- Width of extension
- Permitted development or planning
- Glazing specification
- Intended use of space
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Get started on your Rear Extension project. Speak to experienced Trowbridge professionals who know local requirements.
Get Quotes →Consumer Advice: Hiring a Tradesperson
Before committing to any rear extension project, follow these essential tips to protect yourself and ensure a successful outcome.
Get Multiple Quotes
Always obtain at least 3 written quotes from different contractors. Compare not just prices, but what's included, timelines, and payment terms. Be wary of quotes significantly lower than others.
Check Credentials
Verify the trader is legitimate. Ask for proof of insurance (public liability and employer's liability), relevant trade certifications, and check if they're registered with trade bodies like TrustMark, FMB, or NICEIC.
Review Past Work
Request references from previous customers and photos of completed projects. Check online reviews on Google, Checkatrade, or Trustpilot. A reputable trader will be happy to share their track record.
Get Everything in Writing
Insist on a detailed written contract covering the full scope of work, materials to be used, start and completion dates, total cost, and payment schedule. Never rely on verbal agreements alone.
Be Careful with Deposits
Never pay the full amount upfront. A reasonable deposit is typically 10-25% to cover initial materials. Pay the balance only upon satisfactory completion. Avoid cash payments where possible.
Understand Your Rights
Under the Consumer Rights Act 2015, work must be carried out with reasonable care and skill. If things go wrong, you have the right to request a repair, price reduction, or refund.
Agree Clear Timelines
Establish a realistic project timeline with key milestones. Include clauses for delays and ensure you're informed of any changes. Good communication throughout prevents misunderstandings.
Check Planning Requirements
For major works, confirm whether planning permission or building regulations approval is needed. The contractor should advise, but ultimately it's your responsibility as the homeowner.
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