Adding Second storey on side extension advice

jamieboot

Hi there, 

we are on a corner plot and I am hoping to add a bedroom directly on top of our side extension which houses the kitchen (external 4.3m x 3.8m).

I know I will need pp for this and aim go get some builders around soon to have a look.

Seems like it would be pretty straightforward but just trying to get my head around how the rooflines would work. Could I just raise and use the gable roof of the extension and incorporate this into the hip roof of the main house? Or would I need a new roof entirely? 

Attached are a few photos.

Any advice on this would be appreciated

Thanks 
J

grumbler

No photos...
And it's more or less straightforward only it the foundation is sufficient for two storeys.

jamieboot

Sorry photos attached and footings are good for two storeys

Section62

jamieboot said:

Could I just raise and use the gable roof of the extension and incorporate this into the hip roof of the main house? Or would I need a new roof entirely?

If the main roof is hipped then you would need to do a hip to gable conversion, or relocate the hip - which means some fairly substantial work to the main roof is needed.

Raising a single storey gable to full height means having adequate foundations, but it can also look unattractive trying to build new brickwork off the top of a pitched gable wall... you may get a better result by demolishing the gable to the existing wallplate level and building from there.

In terms of cost/space, ending up with a replacement hip roof probably won't be the most economic solution - although you'll be lucky if the foundations of a single storey wall are adequate to form a full-height gable.

You'll probably need to speak to an architect rather than a builder to figure out the most economic and practical approach. Conversion of the loft space (if it isn't already) should also be a consideration.

grumbler

jamieboot said:

Seems like it would be pretty straightforward but just trying to get my head around how the rooflines would work. Could I just raise and use the gable roof of the extension and incorporate this into the hip roof of the main house? Or would I need a new roof entirely? 

With a full gable wall (side wall of the loft), the roof is more easy to build/change, but where I live, for a semi-detached house the council didn't want a full gable wall and insisted on a 'clipped gable' (half hipped) roof at least.