Conservatory conversion

[Rambleamble]

We have a conservatory on the back of our house that is accessed from the kitchen. The previous owners put a solid roof on it, plastered, painted etc but it’s still bloody freezing! It was built at the same time as the house, and has the same footings as the rest of the house which i understand to be very rare! We would like to brick up the majority of it, add bifolds and take down the internal sliding doors. Basically making the kitchen much larger and it all being one space.
does anyone know ballpark how much this is likely to cost? And if I would need plans for it, or could just approach builders? The room is 3.5 x 4m
thanks!

Cost me 35k in 2017 including floor and kitchen

Wow 35k!! Was that just building up the walls in place of the glass as the foundations were strong enough? Or knocking it to create an extension?

Following as wondering the same thing

Op how did you check yours was suitable for a single extension?

Sorry, building up the walls, proper tiled roof, new windows, doors, flooring for the whole downstairs and kitchen!

I checked my foundations were deep enough by literally digging a whole down, measuring the depth and sending pictures to building control to make sure they'd accept it. It was all so much easier than expected. Building control were so helpful!

Steels and knock through too

You’ll need loads of insulation.

We did this about 6 years ago and cost around £35k plus kitchen which was c£35k. However this year we put in a supersize column radiator and this has made a huge difference to temperature we’ve also got a huge amount of insulation in the roof of the kitchen because our conservatory area is all thermal glass. I did the project management myself using individual tradesmen. If you use a firm that does everything I would expect the cost to be higher.