Rear extension costs

[buildingmynewhome]

I’ve received a quote for my rear extension. £52,000 for a 7m x 4m extension and a new utility room and wc where the old kitchen used to be.

12 years ago, the foundations for the extension were already dug out and concrete poured. We unfortunately ran out of money so had to stop works.

the price also includes:
1st and 2nd fix
install kitchen floor tiling
plastering walls
create 1800mm opening (rsj already installed)
close up through lounge with breeze blocks

is £52,000 a reasonable price?
Based in Ruislip, West London.

That seems good roofing?

@buildingmynewhome that’s fantastic price , especially for London

did you get many quotes? Would you be able to say who the company is?

He said it’s discounted as he is like a son to my uncle and would normally charge way beyond that even if foundations are done.
havent had any other quotes as I know his work is on point, just wasn’t sure about the quote.

Ah ok, then yes seems heavily discounted, as these were pre covid quotes

I'd bite their arm off for that, is it inc. or ex. VAT?

the only thing I'd say is you'll need to check the foundations situation with building control. As they have to come out once the trench is dug to sign off the depth before the concrete is poured.

So, do you have that box ticked from 12 years ago? If so I would check with them that they're happy to use that, assuming the extension plans are exactly the same and the building control regs haven't changed since.

That seems very reasonable to me but I am no expert.

Agree with @Flyingdolphins you need to check building inspector will accept foundations - regs have changed in 12 yrs and what they require fo evidence is different.
If insulation is already in slab does it meet the current requirements?
cant advise on costs as they can vary so much by location, spec & requirements
just make sure all the paperwork is correct for building regs sign off or it can cause problems if you ever want to sell - check now not when the builder has finished
I would say that quite a few smaller builders are not up on the changes in the Building Regulations and the requirements of the Building Safety Act so be careful.
(architect who works with small builders all the time)

Just to clarify that this includes all build costs inc Windows and Roof, heating system, 1st fix and basic internal work, Removal and site tidy for rubble and rubbish etc?

Net or Gross?

The fixtures and fittings then on top of that.

I’d get building control around to check the foundations before you do any more
They may not comply now.

The price is very very good

I spoke to the builder in detail yesterday. Kitchen units and door and window installations are excluded.

his end point is plastering and painting, tiling also included.

BC have confirmed they will do a site visit, 4 drill holes to check foundations before work can commence

£52k doesn't sound unreasonable for a 7m x 4m rear extension in West London, especially with first and second fix, kitchen fitting, tiling, plastering and the internal alterations included. I'd still get 2 to 3 quotes to compare what's included.

You can also check it against current UK rear extension costs here renocost.co.uk/extension-cost/rear-extension-cost-uk