CONVERTING A GARAGE TO A KITCHEN / UTILITY ROOM

Do you need planning permission to converty an existing attached garage into a new kitchen, or possibly an attached utility room ?

The garage door will obviously be replaced with a foundation and double wall. The external 4 1/2 " wall will be lined on the inside with a damp proof barrier, insulation and a stud wall.

Any advice would be appreciated

thanks

it is unlikely that you will need planning permission unless the property is restricted by some kind of deed of covenant or in a conservation area.

you will however require building reg's as this is controlled work.

I am currently having the external garage wall and full boundary wall replaced, following an insurance claim. New foundations have been placed and brickwork will start soon

I learnt yesterday that because the old timber lintels are being replaced, over the existing garage (probably 3m wide) the existing roller type door is being replaced. A new timber frame, double timber door and steel box lintel will be added to hold the small parapet wall above the old door.

I'm thinking I should take this opportunity to speak to the builder and instead of

frame + painting
door + painting
lintel

I could pay extra and have

foundation
new wall / with window

That way, would make everything cheaper in the long run. Previously the insurance company were simply going to rehang the existing 4-panel roller door so there was no real financial advantage of having the wall built then.

I thought just to get the garage / wall construction out of the way, then find my old builder to do the wall.

Any thoughts on this idea please !!

Also, there's a 90mm drop from the existing kitchen to the garage floor. Could this be made up with DPC, 50mm jablite insulation, then a floating floor on top

Regards !

noseall's advice was good, as usual, although you may also need PP in some circumstances for the deletion of a parking space to your property.
The work that's going on requires Building Regulations approval. MAKE SURE the insurance company/builder have that in hand, (ring the Council) and, that you get a Completion Certificate (via builder or Insurance Co.) from Building Control, otherwise YOU could come unstuck in the future.

Can you not get the current builder to build you an insulated cavity wall as a replacement, at your extra cost? or at least to build an inner leaf off the new footings upto floor level, then you can have it built up as a cavity later? Be miles better!

As for the floor. Yes the methodology is fine, but you should use a Kingspan/Cellotex/Xtratherm type foil faced insulation board as they're better performing, millimetre for millimetre of thicknes, than polystyrene, and you're more likely to achieve the required insulation value of 0.25W/sq.m.K. (They make a 70mm board + say 20mm flooring =90mm!)