cost of extension

fusar

Hello

I am planning to add a small extension to my property, which will measure 3m x 3m, and three stories high. At the moment, I am planning the budget, and wondered if anyone has had a similar house extension? If so, may I ask the average cost per m2 – including the build, plastering, wiring (the shell, before kitchen is fitted)etc…or the final cost of such an extension? I live in the North, so am hoping that prices won’t be as high as the South East for such an extension. Any help would be great.

Thanks

Doozergirl

The rough budget is about £1000 per m2. So for you it would be about £27,000.

fusar

Thanks for your reply.

I have only budgeted £15,000, so maybe I was being over optimistic! Is there any way to reduce the cost of extensions - desperate measures needed!

Thanks
Sarah

thesaint

Get a few quotes in, if it's still too expensive, get the structure done and only complete one of the floors. When you have more money finish it then.

brixandmorta

Hi

Not wanting to dampen your plans, my wife and I had plans drawn up for a single storey extension onto our 4 bedroom house, it was rife with problems from start to finish. Even on the first day of digging the footings we were told by the building inspector that because of a hawthorn hedge running down the side of the house the footings had to be 2.8 metres deep instead of the 1metre that had been quoted for, £3500 later the extra work was done, not to mention the first digger had to go back as the boom was not big enough to dig that deep!!!

My advice to you in my experience is once you have a figure, say for example £20,000, then double it, you will be somewhere close to the final figure the project will cost you, if you had given me the same advice before our work started I would not have believed you, but costs really do escalate at quite a rate.:doh:

real1314

standard quotes are for 1m footings, but 3 storey will probably need deeper/wider footings.

also you may find problems with the ground - our extension needed £5k of piling as the builder couldn't find solid ground by 2m down (although he did find the floor of the mill that previously stood on the site - he had to drill through it for one of the piles!!).

I'm north of mcr and was quoted £20k for 5m x 3.5m 2 storey extension, but that was over 2yrs ago, more likely to be £25-30k now.

TJ27

I built a 2 storey extension about six years ago. It's about 4m x 5m, so 40 sq metres in total.

I didn't employ a builder to do it. I bought all the materials myself and employed a bricklayer, a roofer and some other tradesmen. I have a fair idea of what's involved with building work, so I organised everything and also did quite a bit of the work myself.

I managed to do the extension, re-roof the entire house, decorate, fit a new kitchen and buy all the appliances, for fifteen thousand pounds. I kept a spreadsheet of all the costs involved and was amazed at how little it was.

Builders tend to make quite a lot on materials. This is why I have an account with my local merchant and use tradesmen on a labour only basis. Instead of paying over the odds for materials, I was usually able to negotiate a discount.

Of course it does help that I have a building degree and am able to do basic carpentry, rendering, plastering, plumbing, glazing and electrical work. (I also used to be a grave digger and can use a shovel )

evosy1978

there is a really usefull website for this type of info call https://www.ebuild.co.uk.