Adding a double storey extension is one of the smartest ways to expand your living space and boost property value—without moving. But the big question remains: How much is it going to cost? That’s where our double storey extension cost calculator comes in.
Whether you’re planning extra bedrooms, a bigger kitchen, or a home office suite, understanding the price upfront gives you control and confidence. At KT5 Construction, we’ve developed an easy-to-use calculator that gives homeowners in London and Surrey instant access to realistic pricing tailored to their needs.
Why Use a Double Storey Extension Cost Calculator?
Many homeowners start with guesswork. They Google averages. Ask friends. Scroll through outdated blogs. The result? Confusion and under-budgeting. Our double storey extension cost calculator takes the guesswork out of your planning process.
Benefits of Our Calculator:
-
-
✅ Instant estimation tailored to your extension size and location
-
✅ Real-time cost insights based on current market rates
-
✅ Personalised options for materials, finishes, and layout preferences
-
✅ No commitment required – free to use and explore
-
With rising build costs across London and the South East, having accurate figures before you begin helps you stay in control. KT5’s calculator is a starting point that leads to smarter decisions and smoother builds.
How to Use KT5’s Double Storey Extension Cost Calculator
Simple Steps to Get Your Estimate
-
- Select Your Extension Type.
- Provide Key Project Details.
- Specify Your Extension Options.
- Add Interior Requirements.
- Get Your Total Estimate.
Why Choose KT5 Construction?
KT5 isn’t just another London builder. We’re a trusted local contractor known for honest pricing, high-quality workmanship, and full transparency. We’ve helped hundreds of families in London and Surrey maximise their living space without blowing their budgets.
What Makes Us Different?
-
-
✅ Free planning drawings (worth up to £2,500)
-
✅ Fixed-price quotations to avoid mid-build surprises
-
✅ Transparent communication from day one
-
✅ Full project management – from drawings to completion
-
✅ Local team with decades of experience
-
Read more about our services or get to know us better on our About Us page.
Common Questions About Double Storey Extensions
1. How long does it take to build a double storey extension?
Usually 16–24 weeks depending on scope, finish, and planning requirements.
2. Is planning permission needed for a double storey extension?
Often, yes. Especially if the extension goes beyond the rear wall or affects neighbouring properties. Use our calculator to see if your project qualifies.
3. Can I build above a garage?
Yes, but structural work may be more complex. Our cost calculator takes this into account.
4. Do you offer turnkey packages?
Absolutely. KT5 manages your entire project – including architects, planning, and build – so you don’t have to juggle multiple contractors.
Final Thoughts: Budget With Confidence, Build With Trust
Don’t let uncertainty delay your dream home upgrade. The KT5 double storey extension cost calculator is designed to give you clarity, speed, and control—all with the expert support of a builder who puts people first.
Recent Comments