£30K difference in quotes for single storey extension

iharding

A 5x5.5m single story flat roof kitchen extension, in Surrey, not including the kitchen, but including fitting, wiring, gas, plumbing, walls to bare plaster, floor to bare screed, with double external door, window, and 2 large velux roof lights cost me about £52K earlier this year. I forget the exact figure because we added some other small jobs.

We had three quotes, one was just under £50K, but then stopped responding when we tried to follow up. The other was £75K, and didn't include the doors or windows as he wanted to get a precise spec for them.

The builder we used turned up in a van, wearing dusty clothing, and employed the whole team full time. Estimated up to 8 weeks, but was done in just over four, with people on site 730am to 430pm every day. The 75K+ builder turned up in a shiny Range Rover, wearing smart clothes, and worked exclusively with sub-contractors. He estimated minimum of 12 weeks, allow for 16. Easy to see where the extra money was going!

leveller2911

iharding wrote: »

A 5x5.5m single story flat roof kitchen extension, in Surrey, not including the kitchen, but including fitting, wiring, gas, plumbing, walls to bare plaster, floor to bare screed, with double external door, window, and 2 large velux roof lights cost me about £52K earlier this year. I forget the exact figure because we added some other small jobs.

For a single story extension thats expensive and it didn't even include a kitchen. Roughly £2k a sq metre for a single storey, No staircase,no kitchen,no bathroom ,so basically a shell so unless there were difficult ground conditions to address then it sounds over the top to me.

mrsmazza

We are in West Sussex, and we have been quoted 40k for a 4,2x 4m extension. ( but the builder lives in Surrey )
This doesnt include the kitchen or decorating we are doing that ourselves.
We are having a pitched roof, with 2 sets of french doors.
My builder has listed everything, with the cost, so we are welcome to try and source items cheaper ourselves.

i would get the plans done first and also the structural engineer calculations, then get planning permission, then start getting quotes.

southcoastrgi

krey wrote: »

bogus tradesman.

Also remember, we tradespeople have different suppliers than your B&Q, things at builder merchants are wayyyy cheaper with some haggling, I mean sometimes up to 2-3x for small items.
but yet everyone in their quotes includes the B&Q prices

Who said anything about bogus tradesmen ? The OP has already said they have used them before & were happy.

You want your head read if you think trades would price a job like this from B&Q, although Tradepoint prices are very comparable, yes the likes of Jewsons might be cheaper on some things but not all things, at one time B&Q were the cheapest around for mulitfinish

Clive_Woody

mrsmazza wrote: »

We are in West Sussex, and we have been quoted 40k for a 4,2x 4m extension. ( but the builder lives in Surrey )
This doesnt include the kitchen or decorating we are doing that ourselves.
We are having a pitched roof, with 2 sets of french doors.
My builder has listed everything, with the cost, so we are welcome to try and source items cheaper ourselves.

i would get the plans done first and also the structural engineer calculations, then get planning permission, then start getting quotes.

We are also in W.Sussex and had a 4x5m extension done, single height, pitched roof with 4 velux windows, double doors to the patio, plus some internal alterations including bi-folding doors to close off the dining room and the original opening widening and the beam raising. We also had to have 6 foot deep foundations as we have big oak trees close to the house. Decorating was included as well as new wood flooring.

You might want to get some other quotes as that seems high (obviously I haven't seen your plans). Our extension cost just over £36k, which included architect and engineer fees :money:

http://www.architects-hertfordshire.co.uk/view-project/rear-extension-to-replace-conservatory-10/