Cost of groundworks / foundations as opposed to basement.

[Yellowduck]

Further to above post...

I have had a rough quote for a 90sqm single storey bungalow (no rooms in roof) at £125k for a good quality finish. The foundations will need to be at least 2.4m deep due to trees close by.

I am also considering having a basement built underneath, to the exact footprint of the bungalow, which would negate the need for foundations, as the basement walls would support the bungalow.

The cost of the basement, by a specialist company, including drainage, partion walls to basement, and plasterboard finish, would be about £50k. The bungalow would then be built on top, but would not need any groundwork.

My question....on a quote for a complete bungalow at £125k, how much is this likely to reduced as there would be no groundwork required, as the basement and bungalow floor would be in situ, when the builders take over the project.

I know the overall cost will be far more, but it will double the habitable floorspace of the bungalow....

Any thoughts?

Thanks......

 

[^woody^]

The probelm with a basement the full size of the bungalow, is that there will be no windows, so its not really prime 'living space' - more like storage or an occasional AV room or play room.

You would have to confirm if the costs add the equivalent value to the house. I doubt it will

It might be habitable, but who wants to live in a basement under a tungsten bulb?

 

[Static]

Hmm.. i doubt it will reduce the costs that much if any.. and you may be opening yourself up to further problems. You will loose living space with the addition of stairs to the basement. The basement will need ventilation.
You say the new basement will not need groundwork.. who is digging the huge 3.4m deep hole and removing the soil offsite? or is that covered by the 50k?

 

[rangersman]

I have had a rough quote for a 90sqm single storey bungalow (no rooms in roof) at £125k for a good quality finish. The foundations will need to be at least 2.4m deep due to trees close by.

That is 1400 pounds / sq m.

Is that that sort of "general" rate to expect for construction of a bungalow in the UK now?

Last one I built (7 years ago and in scotland) was 350 pounds / sq m. !!!

 

[freddiemercurystwin]

All habitable rooms have minimum window area requirements as well as need to be secondary means of escapes.

 

[JJR]

You may find the following pdf file from the Basement Development Group website worth a read - http://www.basements.org.uk/ul_pdf/pnpdf_1.pdf

It is entitled "Basements 1 - Benefits viability and costs"