Instant Estimate
Get a ballpark figure in seconds. Adjust the service type and size to see your estimate.
Typical: Room 10–20m² • Extension 20–50m² • Loft 30–60m² • New Build 80–200m²
Your Estimated Cost
£85k – £115k
Based on £2,500/m² for extension
*Indicative estimates only. Final pricing depends on site specifics, finishes, and scope.
We'll review your estimate and provide a detailed, fixed-price quote.
How it works
Choose the kind of work, then slide to the approximate floor area — anything from 10 m² to 200 m². The calculator multiplies that area by the rate for the service and shows a range from 15% below to 15% above the result, because finishes and site conditions move every project one way or the other.
The lower end of the range never drops beneath the published starting price for that service, so a small area will not produce a figure we could not build for.
When the range looks right, send it to us with a few words about the project — and any drawings or photos you have. We review it and come back with a detailed, fixed-price quote.
What the numbers assume
These are the rates and starting prices the calculator uses. They match the prices published across the site, so the estimate and the service pages always agree.
Extension
Ground, side & wraparound
Loft Conversion
Dormer, hip-to-gable, L-shaped
Renovation
Full, partial & refurbishment
New Build
Detached, semi, terraced
What to do next
01
Use the form beside the calculator. We call back within 24 hours to talk it through.
02
We inspect and measure the site, review any drawings, and discuss budget, materials and what you expect from the project.
03
A detailed quote in writing. The figure we agree is the figure you pay, backed by our workmanship guarantee.
It is an indicative range for budgeting, not a quotation. Final pricing depends on site specifics, finishes and scope, which is why every project is priced properly after a free site visit.
Each service has a starting price, and the calculator never shows a figure below it. Until your area multiplied by the rate passes that starting price, the range stays anchored to it.
We review it alongside your description and call you back within 24 hours. If the project suits us both, we arrange a free site visit and then a detailed, fixed-price quote.
Yes. Send your estimate first, then email existing plans, planning drawings or photos to info@linxdesignbuild.co.uk — they all help us price the work more closely.
Plan & Pricing
Every tool is free and needs no account. Use them in any order — each one answers a different question.
