Approx build cost please?

[leew2]

I recently built a workshop for about £7500 in total. This was 4.1m x 6.2m internal so a little bit smaller. It's been built to full building regs standard with cavity wall with 75mm fibreglass batts. Almost 100% of the work done myself over a 6 month periord (made redundant so working on build pritty much full time). 1.2m deep trench fill foundation. This workshop is attached to the rear of the existing garage so I only built 3 walls, the fouth is the back of the existing building, I would say allow an extra £1000 for the fouth wall. It has a GRP flat roof (£600 for matirials and tools) with 100mm Kingspan insulation. front and side walls are breeze block (to be rendered, not done yet) and rear wall is brick layed overhand (first ever bricklaying too, and I'm quite pleased with it, shame only my nahbour can see it).
The foundations and base upto DPC level cost about £2000 and were built fairly quickly, hired a mini digger and a thwaites dumper for 4 days at about £110/day (never used a digger before, someone expirienced could have possibly done same thing in 2 days). I filled 4 skips with spoil in those 4 days at £110 per skip. Once trenches were dug and inspected, we filled them with readymix concrete, 6m^3 needed at about £80/m^3.

 

[indus]

Thanks Lee. Your foundation costs are interesting, at £2k that's massively cheaper than what others here have mentioned. Mine would be a bit deeper ie 1.5m but about the same size.

The other issue being that mine will probably have to be done by hand as access won't allow diggers etc (unless I demolish my garage first, which I'd rather not do)

Thanks for your input

 

[jeds]

Depends. If you want it built (by a builder that lives in a house, prefers to eat food and has to pay a mortgage etc.) it's £22k. Or you could get in the Lone Ranger and Tonto for £15k. But you might want to get hold of Dom the cowboy chaser's number just in case. Or you could do it yourself for £8k. It would help if you could get yourself made redundant so you have time.

 

[jeds]

The other issue being that mine will probably have to be done by hand as access won't allow diggers etc

Hold on kemo sabe. We didn't allow for Tonto doing any handballing. That'll be an extra £6k.

 

[leew2]

You could hire a 'micro' digger. They are designed to fit through a standard size doorway, the tracks retract inwards and the roll over bar folds down. My site had restricted access but I was able to get a 1.5 t mini digger through the 1.2m gap (tight fit though). The dumper (smallest avalible) was a very tight fit too.

If you cannot get the digger around the house and don't want to take it though the house (the weight may cause damage to your floors). One thing you could do is to bash a hole in the back wall of the old garage, take the digger though then board it up.

The Takeuchi tb108 can dig down to 1680mm so should be upto the job if you can find one to hire in your local area. http://www.takeuchi-mfg.co.uk/excavators/tb108.html

 

[indus]

Steady on cowbody

Where in my posts dioes it say I want it built for £15k??

I've never said that and that is not my intention. And nowhere am a presuming that a builder can build it for self build money.

My question has always been what is a reasonable price to have the job done well. For me to make sensible judgements on quotes it helps to understand what the hardware and labour costs are. Only then can one decide what might be too expensive and just as importantly what might be worringly too cheap.

And you should have allowed for handballing as I have clearly stated in my reply to oldun that my access is 1m at the narrowest point

 

[leew2]

I don't think you can get a dumper which would fit through a 1m gap thus you would need to use wheelbarrows for getting the spoil to a skip. However the larger 1.5t takeuchi tb016 digger should just fit as it's 980mm wide with the tracks retracted or the micro will fit easy. http://www.takeuchi-mfg.co.uk/excavators/tb016.html

Not sure what your soil is like but I was digging though very hard clay which would have taken weeks to dig by hand.

 

[noseall]

The days of lifting or barrowing up planks into a skip are all but gone.

These days we put down lorry tarp's, then 18mm plywood sheets and dump the spoil on this platform so that the grab-loader can take it away.

We use skips for general waste.

Soil, rubble and hard core etc, all goes with the grab man.

However, if we do need to contain the waste, particularly when bad weather is forecast and the spoil is going to stand for a while or if there is no dumping area or if there is not enough for the grab man etc, then a skip is the only way to go.

 

[joe-90]

Is this one of those garages for immigrants we see on the TV all the time?

 

[theoldun]

Indy,
Size 6.5x3.5. Reduce dig 200. Excavate founds 1500x600. Cart to tip. Concrete founds 900 deep. Concrete blocks to footings. 100 MOT consolidated, poly DPM, 100 celotex, 100 trowel finish slab. U value 0.22W/m2K. 300 cav wall, brick face 100 drytherm 32, block, K value 0.15 fair faced, jointed, U value, just scratch in at 0.22. DPC, ties, feb, sand, cement, insulated DPC to reveals included. 2 no 1200x1200 uvpc windows and 1 no pair uvpc French doors 1800x2100, Fensa fitted. U value 1.5. IG lintels above all openings. 50x100 plate. Fink trusses 25degree pitch and gable ladders, complete with all bracing , restraints and tie downs. Breather felt, 25x50 battens, Redland Regent roof tiles, half round ridge and all fixings. UPVC facia, soffit, barge boards and trims, ditto square line gutter and down pipe. 100 osma to 2 no soakaways complete with storm crates. 370 fibre glass to roof space, U value 0.16. Plasterboard 12.5 to ceiling tape and joint with 32x38 perimeter mould and all noggins as required for plaster board. UVPC cill boards. 18x125 MDF skirt. 15 spots complete with fire hoods, 10 double power points and fuse box. Clear away on completion.
VAT registered builder £22177.00
Non registered VAT builder £20848.00
The above figures include for 20% overheads and profit. Materials have been priced touch high, so that we hope that they are covered although in all honesty we do not know London rates for labour or materials or parking difficulties in your area. Our price is based on current rates in Bedfordshire area.
Price is based on minimum 2100 wide access for 3 tonne 360 and 3 tonne dumper. As you have not got this width will give you an E/O price for hand balling in the next couple of days.
Only item not allowed for is supply dig and lay new under ground electric service. Do not know whether paths etc have to be jack hammered up.
If you want copy of our figures to see exactly what is what, then PM us your address or email and we will send them to you.
Trust this is of help to you Indy, and in our opinion is worth a donation of a fiver to Help the Heroes fund raising box.
Regards oldun.

 

[indus]

Thank you so much Oldun. That is worth much more than £5, you have my word that £20 will go in this week.

Thanks again