Extension Cost Calculator
Welcome to our Home Extension Cost Calculator.
If you’re envisioning a home extension project in the UK, our calculator is here to assist you in estimating the overall cost.
It provides a quick and reasonably accurate assessment of your project expenses, factoring in variables like location, doors, roof options, windows, and even rendering.
However, please keep in mind that while our calculator is a valuable tool for initial planning, it’s always best to reach out to us directly at 0800 099 6660 for an in-depth and precise written quotation tailored to your specific needs.
Calculate Your Extension
Total Estimated Cost (Inc. VAT):
Here’s What’s Included
Supply and fit for the following
- Drain Runs
- UPVC Manhole
- Soakaway
- Foundations
- Damp-course level
- Insulated concrete floor (120mm Celotex)
- External cavity walls walls (90mm Celotex)
- Roof structure, insulation and covering (150mm Celotex for warm flat roof; 70mm Celotex between joists and 80mm Celotex under joists for cold flat roof with 50mm gap and abutment ventilator; 120mm Celotex + 72.5mm Insulated plasterboard for pitch)
- Glazing units (if selected)
- Fascia boards & soffits
- Rainwater goods
- Electrics (1st & 2nd fix white plastic plates)
- Plumbing (1st fix supply and fit & 2nd fix fit only)
- Wall finishes (dot and dab, plaster, white paint)
- Ceiling finishes (lining, plaster, white paint)
- Skirting boards, architraves, window boards (supply, fit and white paint)
- Skips, grab hire, all rubish removal and deep clean after works
Items to consider (if applicable) on top of the above
- kitchen supply & fit including appliances and splashbacks
- final flooring
- colour paints
- landscaping after works
This is typically a full list of items required to complete a standard extension.
It is crucial, however, to book a site visit to get an accurate quotation.
We submit detailed written proposals within 48 hours of site visit. More on our extension services here.
Book one today at 0800 099 6660 or drop us an email at [email protected] and we will be happy to assist.