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Cost calculator

Estimate your project cost in under a minute.

Get an instant guide price for your extension, conversion or renovation. Then book a free, accurate quote with no obligation and no upfront payment.

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ISLAND Kitchen / Diner 6.30 m 4.20 m N MTR DEVELOPMENTS · INDICATIVE PLAN · NOT TO SCALE
Build your estimate

Design it. Price it. See it.

Pick your house and project from the plans below and watch the estimate build as you go. It is a guide to help you plan, not a fixed price.

What type of house do you have?

Access and party walls shape the price, so we start here.

What are you building?

Plan view of your home. The hatched area is the new space.

Choose your roof.

Section view. The roof shapes the light, the ceiling and the cost.

Size it up.

Drag the slider, pick a finish and add anything extra. The estimate updates live.

Floor area20 m²
Finish level
Add ons
Estimated cost
Choose your house and project from the plans, and your guide price will appear here.
MTR DevelopmentsYour spec
House
Project
Roof
Size
Finish
Book a free accurate quote

This is a guide only, not a quote or a contract. Real costs depend on your home, access, specification and finishes, and the figures exclude VAT and professional fees. Book a free, no obligation visit for an accurate price.

What goes into the price

More than four walls.

Our prices cover the whole build done properly, from the steel that holds it up to the warm roof that keeps it usable all year. Here is what sits behind a typical single storey extension.

Warm insulated roofSteel beamBifold doorsReinforced foundationsMTR DEVELOPMENTS · EXPLODED ISOMETRIC · NOT TO SCALE
Good to know

Cost questions, answered.

No. It is a guide based on typical Midlands build costs. Every home is different, so the only way to get an accurate figure is a free visit and a written quote.

Size, the level of finish, ground and access conditions, the structural work involved and the fittings you choose, such as glazing, kitchens and bathrooms.

No. Quotes and site visits are free and come with no obligation.

No. You pay in stages as the work progresses, never before it begins.

No. The figures are a build guide and exclude VAT and professional fees such as planning, structural calculations and building control.

Start your project

Ready for an accurate price?

Book a free, no obligation visit and we will give you a clear, itemised quote. No upfront payment, ever.