Extension cost & Advice

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22 Dec 2025
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Evening,

I’ve been thinking about extending my cottage for a few years, the house was extended in the 80s to add a kitchen and very small bathroom, annoyingly it was only to about two thirds of the area it could have been.

I’d like to “square off” the current extension, add a nice family bathroom.

I’m pretty keen and handy with DIY, like to learn and get stuck in, just wondering how difficult these things really are.
it would literally be foundations, two walls and a flat roof. I know a bit of work would be needed to drainage but that doesn’t worry me, Reusing the window that’s currently in the bathroom (only fitted 5 years ago) move the door from the side to the rear, utilising the window space as a new door way.

I’d like to do as much as possible but I’m also wondering how much it would cost to get this built, just the shell. Everything internally I can do.

Where do I go with getting plans drawn up etc? Can’t see this needing an architect as it’s very simple. I’ve added some pictures of the building for context, also the Floor plan from the current layout and my ideas drawn on to the at floor plan, walls in red. Hopefuly that makes sense.

Any help and advice is appreciated, Angus Scotland.

Cheers
 

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