Questions about extensions

[GreenSpaghetti]

I live in a traditional 70s semi and am thinking about doing a double storey extension on the side (knocking down an existing garage/conservatory first. Currently waiting on some very slow builders quotes. In the meantime, wondered if anyone who has experience of doing a similar extension would mind answering the following questions:

1. What did it cost (roughly) and how did this compare against budget?
2. How long did it take and how did this compare with the original schedule?
3. Where abouts in the country are you? Thanks v much. I am aware that this information wont necessarily be of any relevance to what I would like to do but have no idea what to expect really.

Neighbour has just done similar. About 30k for living space downstairs and bedroom with en suite above. SW.

£1000 per Sqm is a good guideline to say first fix. This excludes fitting out kitchen, bathrooms, painting, decorating and second fix works. Obviously the variance usually lies on how much people actually spend on the kitting out. My double storey extension was 6x6m so 72 Sqm in total. I had 3 rsj's put in and my bill to first fix including quite a large amount of glazing plus a set of aluminium bifolding came to approx £70k. We then spent another £60k on kitting it out - kitchen, flooring, appliances, bathroom, shower ensuite, tiling, 100 Sqm of new patio outside, painting, extra insulation between the joists. New doors, radiators, megaflow cylinder, led lighting, outside lighting, etc, etc. Remember to add on 20% vat. Went 20% over budget due to me underestimating the cost of the appliances that I liked.

This was alongside renovating/restructuring the existing house where I have excluded the costs. I saved money by sourcing the majority of the second fix stuff myself - wasn't interested in buying materials for the ground works particularly but I imaging that there were areas to be saved there that I missed.

Scheduled for 16 weeks (including renovating the rest of the house) and was finished 3 days early! East

We are in the early stages of planning a two storey extension. We have been told a very rough estimate of £70k all in and 14 weeks. But the all in price will depend on how much I want to spend on the kitchen etc.
south east. It's very daunting.

First thing comes to my mind is planning permission. I think you need to apply for a full planning permission for 2 storey side extension. A architect can help.

We did a 6mx6m 2 storey extension in 2011 and didn't have much left out of £105,000 including VAT. We had an architect draw it up as I was worried it would look like a blob on the side of the house!

£66K went to the builder for everything up to plastering but not plumbing/electrics, and I think I bought some of the materials direct. We are in the Midlands. All the other costs were tradesmen employed by us, fairly budget kitchen, bathrooms, decorating, garden drive and patio, architect. We did knock through/partition some rooms in the existing house, but it's hard to separate those costs. Obviously costs depend on your standard of finish, most of ours was fairly mid range.

Started in October, builder pretty well mostly finished by mid February , then bits we were doing ourselves went on for another 3 months (and some for 3 years... and waiting )

The budget was initially £95k ish, but it does depend how many extras you count in, windows were more expensive as I wanted timber, garden we were given a way low quote and had to get someone in to fix it.

I think 123rd's budget is about right going on our experience.

We're in the middle of a 2 storey wraparound extension and it should come in between £38000 - £42000. That includes modernising the rest of the house, kitchen, bathrooms, flooring and decoration.

We've managed to get most things for less than normal, the extension itself without the finish would have cost around 40,000, we're in the North East.

Wow msmorgan. That's very good. How have you managed to get fittings etc cheaper? When we have done bathrooms before we have always bought online... But can't do that for rsj or bricks

It is very cheap, its because DH knows a lot of the builders, builders merchants and other trades through his work. I think we did even get the RSJ's cheaper than the first quote.

We got a quote for all the plumbing and heating parts from two local merchants, one undercut the other them we're paying the plumber just for labour, thats saved us around. £3000, we're doing the same with the plasterer.

For the bathroom suites I'm ordering online from a few different places, same with kitchen.

We've basically had the builder just do the actual structure, we're them using our own joiners, plumber etc, it is much cheaper this way, but more hassle!

Forgot to answer how long its taking. We're not finished yet, but we should be in by mid November at the latest, we started mid July so around 4 months.

I think it would have been 3 if we hadn't also been modernising the existing house.

Thanks everyone, it really does feel daunting. But perhaps we just need to get stuck in