How much to do an extension and complete renovation of this house

[kokos1]

Hi All, we're looking for buying a house and most likely it will be the one that requires full renovation and extension. I’ve got absolutely no idea how much that might cost (is it £200K or £300 or £500K)? For example this house requires to re-do existing rear extension + new loft extension with new bathroom + full renovation https://www.rightmove.co.uk/properties/138568226#/?channel=RES_BUY

If anyone has any thoughts I’d love to hear them… Thanks a lot!

We did a complete rewire, loft and extension, 2 new bathrooms, plastered most walls, new boiler some new radiators and redecorate. £180,000. However was 10 years ago so I’d probably add on £100k.

Actually, our house is much bigger so possibly £250k, maybe a bit less. How expensive are materials and builders in Pembrokeshire?

250k - we’re in London and have done similar recently

@Thelondonone It’s in Muswell Hill! Pembrokeshire prices are irrelevant.

I reckon 250ish k.

A lot depends on whether you are going for high end finishes and how big the extension will be. £250K sounds quite conservative for London, in my view. Be sure to allow a generous contingency and get at least 3 quotes.

How long is a piece of string?
Costs for building work have skyrocketed in past couple of years, both materials and labour. This means that lots of people will base costs on work they did recently but say 3/4 years ago and it will be wildly out of date.

Really also depends what needs doing & where you are - full strip back and start again in London or Cornwall will cost completely different to Liverpool or the NE.

I would consider making sure any work you do maximises the energy efficiency of a property. Outlay now will save you money in the long run (fairly quicker), will be more comfortable and is cheaper & less disruptive if you are doing work anyway. Make sure you also look at shading and ventilation as part of this otherwise you will complain in the summer. Properly considered this won't be a problem, however it's often done badly.

The finish you are going for also makes a massive difference for example recent clients have both had a single storey extension with roof light , some very similar internal renovations and a new kitchen .... one spent £48k, the other closer to £450k (their admittedly beautiful kitchen cost more than the whole of the first ones project) both in the same town.

We are in a small 3 bed semi d in London. Initial quotes to do a single story rear extension, Reno including rewrite, knock rebuild and replace existing garage (half integrated to house) and do the loft were £150k from builders 4 years ago. Plannings taken a while. Current estimates are closer to £350k for a scaled back job. Technically only adding less than 30m2. It’s cheaper to buy than build in London at the mo.

I did this on my house in Southfields. It needed taken back to brick and extended so I did a side return and loft conversion, taking it from a 3 bed to a 5 bed. The cost breakdown was as follows (bear in mind this was 2019):
Side return: £70k
Refurbishment throughout (this was new plaster, electrics and plumbing): £30k
Loft: £50k
Architects and party wall fees: £6k

The company I used spoke to me while I had the house under offer and gave me advice on cost and the process etc. They were extremely helpful - Hometales, London. Good luck with your project :) xx

whatever you think it’ll cost x that by at least 1.5

We started thinking about our current reno in 2019. Finally started building a few months ago (so 3.5 yrs later). Costs have gone up massively and it’s costing significantly more than we were told we could do it for in early 2020. And we’ve scaled it back a lot. To do what we’d originally planned would have cost double, at least

Thank you, everyone, for your responses – they were truly helpful!So it looks like purchasing a house without an immediate need for renovation is a wiser choice. The cost of renovations can be unpredictable as I can see and I'm afraid that investing a substantial amount in renovations might not enhance the property's value in the coming years :(

I think if you plan to be there for more than 5 years it would be a solid choice, also I think that you’d get your money back and more if you spent wisely. Did you see that the next door house sold for £750 back in 2018 and a 4 bed on the same street went for £850 earlier this year (you could make this a 4 bed but probably smaller than the £850k one)? Agree that you’d have to want to do the work (and love the house and area) though to be bothered with it all.

Next door house- but depending on your needs preference this could be a 4 bed- you’d split the middle bedroom upstairs and do a bedroom and bathroom in there, then have a bigger bedroom where they have the first floor bathroom.

https://www.rightmove.co.uk/house-prices/details/england-63824041-7211950?s=a2726defbc1ef5d04431f9db2e83bffc8f6d0b3a970bb5164544378d58b828ca#/

I don't think it's worth doing lots of work at the moment, too £££ & who knows what property prices will be like in the next few years.