Approx cost of extension?

[Steve H]

Hi, I have an old "Wickes" wooden conservatory which is approx 15ft long by 10ft wide off of my lounge and it really does need replacing. I have an idea that a replacement UPVC with dwarf wall would be between £7k & £10k depending on quality of materials and my negotiation skills!

I have been thinking about having a single storey extension of approx the same measurements with a pitched roof & velux windows with French/bifolding doors at the end. would anyone have an idea approx how much this could set me back? I assume my existing foundations for the conservatory would need to be replaced?

Also if I decide to investigate this route, what comes first, a builder for a quote or plans to the council?

Thanks
Steve

[JRM]

I'd say builder costs come first, then you know what to apply for.

no idea on costs, but I'd be interested to know as well

[Busamav]

Builders will not be able to provide a quote untill they have seen approved plans , but they should be able to provide a budget .

With just the dimensions you mention , bifold doors and velux roof windows I would guess you need 20 k or so.

By the time you have paid local authority fees , drawing fees , finishes and some vat I would reckon you will have spent close on 25k .

[Steve H]

Busamav said:

Builders will not be able to provide a quote untill they have seen approved plans , but they should be able to provide a budget .

With just the dimensions you mention , bifold doors and velux roof windows I would guess you need 20 k or so.

By the time you have paid local authority fees , drawing fees , finishes and some vat I would reckon you will have spent close on 25k .

Wow, may have to be a conservatory then!!! Must admit that has shocked me!

[Solitude]

around 5k goes into the ground....and thats if you don't need thames water/equivelent surgery.
stick with the too hot in the summer/freezing useless in the winter conservatory.

[Si 330]

£20K will not be too far of for the build cost.

But 5K for proffesional fee's is very steep.

Planning application £150
Buildings regs £600-ish
Design fee on something like this should be well under a £1k

[Busamav]

Si 330 said:

£20K will not be too far of for the build cost.

But 5K for proffesional fee's is very steep.

I dont see anybody suggesting that my 5k was for some vat ,all the fees and some finishes

[Shaolin]

I looked into this last year (must get back on the case). The architect I approached quoted me £2000 m2, searching the web seemed to arrive at an average of around £1200 m2 using a builder only. These figures are all-in.

[herbialfa]

I concur with Busamav!!!