Rough idea of cost to build extension?

6 Nov 2013
Reaction score
United Kingdom
I know its a bit of a "how long is a piece of string?" question but just looking for a guideline really..

My house is 1950's bungalow about 7m wide with a hipped roof.. We are looking at doing a hip to gable end for the loft conversion anyway.. While doing this I am thinking about moving the entire back wall out by about 1.5m to make the kitchen and lounge bigger..

So as a rough guide approximately how much extra would it cost to extend the back of the house by 1.5m before doing the hip to gable alteration?

Sponsored Links
It has been suggested at £1k per sqm for the extra floorspace for a basic extension going up to perhaps £1.5k to £1750 per sqm for a higher end finish.
Move the entire back wall?

Remember your roof sits on that wall and so will your loft conversion.. so factor in a new roof or alot of steel..

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local

Sponsored Links