Rough costs of dormer extension (chalet bungalow)

[Deleted User]

We are in the process of buying a 2 bedroom detached chalet bungalow and need to add a 3rd bedroom. I have been looking into a dormer extension on either side of the 2nd bedroom to split it into two bedrooms of equal size. Can anyone advise a ballpark figure for doing this please? Would it be much cheaper than building a new bedroom as a side extension on the ground floor, which would require new walls, foundations and a roof?
Thanks
Andy

MovingForwards

What county in the UK as price varies.

[Deleted User]

Nottinghamshire

MovingForwards

@Doozergirl @FreeBear any ideas?

in_my_wellies

My son has just bought a four bed dormer which was converted from a two bed in the late 1970's.  In his road there are 2, 3 and 4 bed all built as two bed in the 1960's. Both upstairs bedrooms have an ensuite.
The vendor showed him the plans for the alteration so he knew where pipes/wiring etc went. She also had plans there for a three bed. She said the difference in cost for the three bed verses the four bed was only £270, not sure what that would be in today's money but to her it was a no brainer.

AlexMac

Let Google be your friend;
https://www.mybuilder.com/pricing-guides/house-extension-costs

Doozergirl

I don't know what the house looks like, but I'm not the biggest fan of dormers and so don't have much experience. 

In theory, the conversion should be cheaper.