If both storeys are the same size a generally accepted rule is to add 50 extra to the build cost of a single storey extension.
Single storey pitched roof extension inside.
First and foremost a flat roof extension will usually be cheaper to create than a pitched roof extension.
That s because creating one involves less materials labour and time.
A single storey extension will allow you to transform the downstairs of your house be that by adding an open plan kitchen space utility room or home office and it simply offers a cost effective alternative to moving house altogether.
Again london and the south east will more likely be pricier.
The extension was built with a pitched roof underfloor heating bi folding doors and two electric velux windows.
This single storey rear kitchen extension created additional ground floor living space.
The kitchen with granite worktops cost 15 397 and the glazing including rooflight cost 12 000 image credit.
The costs involved in fitting out a single storey extension very much depends on the room type you re adding a kitchen will be.
How much does it cost to fit out a single storey extension.
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The fabulous thing about single storey rear extensions is that you can add a pitched roof which adds so much height to the bungalow.
Whether your single storey extension is flat roofed or pitched in order to create a living environment which is light and welcoming for friends and family the right rooflights or pitched roof windows can make the world of difference allowing three times as much daylight into a room than vertical windows.
39 000 50 58 500.
Many homeowners when building single storey extensions tend to opt for a flat roof because they are cheaper and quicker to create.
Add 10 for professional fees and vat 76 050.
What about two story extensions then.
Another plus is that you will enjoy more natural light inside with the addition of rooflights and bi fold doors.
The shape of the new edifice designed by jlarchitecture looks attractive at the back of the house and gives the owners extra ceiling height without overwhelming the external space.
Architect favours a flat roof or a partially flat roof flat on the side adjoining the neighbouring semi then pitched over the non adjoining end of the extension.
The velux windows are fully automatic with remote control and self closing if it rains.
Single storey rear extensions can often be carried out without the need for planning permission as long as they meet certain criteria in terms of size height and look.
Pros of a flat roof extension.