Rear Extension Costs in Kingston upon Thames
Extension at the rear of the property - local pricing for Greater London.
per project • 8-14 weeks
About Rear Extension in Kingston upon Thames
Considering a Rear Extension project in Kingston upon Thames? Understanding the real costs in advance is crucial for budgeting. Our calculator uses Kingston upon Thames-specific pricing data to deliver trustworthy estimates.
The typical cost for Rear Extension in Kingston upon Thames typically runs £28,400 to £63,900. However, your specific costs vary based on several factors.
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
Knowing why prices fluctuate allows you to assess quotes properly. In Kingston upon Thames, labour costs, supply chains, and project complexity all influence pricing.
- Projection depth
- Width of extension
- Permitted development or planning
- Glazing specification
- Intended use of space
Get Free Quotes
Receive as many as 3 free Rear Extension quotes from reputable Kingston upon Thames professionals. Compare prices and pick the right option for your needs.
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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Rear Extension in Other Areas
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