Double storey extension Questions

8 Jul 2006
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United Kingdom
Good Morning all,
I was hoping for a directional Idea of cost (within 20%) of a double storey extension that we are thinking of adding to a house that we are interested in buying (or if our plan is even feasible)

I am sure you get this all the time, and I know sometimes it is a ‘how long is a piece of string’ question but it is hard for us to make a decision on what we want to do without knowing if our plan will work, and is affordable.

The property is a chalet bungalow (Picture 1) and has a small double storey extension already. We want to convert it from a 2 bed to a 4 bed and had the idea of adding another double storey extension as a mirror design to the current, but coming out from the property a lot further.

The total footprint of the extension would be 5.5M X 4 M. (Purple Part)

Also I would like to add 7 dormer windows (3 on the front, 4 on the back)
If anyone could help me that would be great.

Picture 1 – Front of house
Picture 2 - rear of house current
Picture 3 – Rear of house with new extension (very crude)

I am based in Essex

I will be refurbishing the rest of the house as well, moving walls, and adding bathrooms but roughly know the cost of these as have done some before.

Thank you all in advance!!

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