Concrete base cost

Doozergirl

And planning? This is not ancillary to the dwelling and contains drainage - I don't build this sort of stuff but it sounds like it needs planning permission to me.

Drainage with a new connection to the sewer would need building regs approval.

I'd be very surprised for this not to need at least one permission out of planning and building control.

I think £2600 is reasonable to answer your OP, I just worry that you're going to asked to take it down!

TheCyclingProgrammer

Doozergirl wrote: »

And planning? This is not ancillary to the dwelling and contains drainage - I don't build this sort of stuff but it sounds like it needs planning permission to me.

OP already stated they are aware it will need full planning permission (I agree it certainly doesn't sound like it would come under permitted development regardless of size due to the way its being used).

The Planning Portal website seems to back up OP's view that a building under 30sqm wouldn't normally need building regs as long as there is no sleeping accommodation and is at least 1 metre away from the boundary (or made of substantially incombustible materials):

https://www.planningportal.co.uk/info/200130/common_projects/43/outbuildings/2

That said, it does say *normally* so there are probably exceptions that the Planning Portal website is glossing over, so certainly worth OP checking with their local building control department and not taking the word of their supplier.

Doozergirl

It's over 30 square metres, no? The slab is over 44.

TheCyclingProgrammer

Doozergirl wrote: »

It's over 30 square metres, no? The slab is over 44.

I must be going mad...I could have sworn it said 29 sqm earlier and now I think I'm getting confused with another thread.

In which case, the PP website seems to back up what you are saying about it needing building regs. OP should contact her local building control if she's still unsure.

Twinkle_068

Doozergirl wrote: »

And planning? This is not ancillary to the dwelling and contains drainage - I don't build this sort of stuff but it sounds like it needs planning permission to me.

I think £2600 is reasonable to answer your OP, I just worry that you're going to asked to take it down!

Yes, I need full planning permission. I'm currently in the process of writing Design and Access Statements. I shall also submit Site and Location plans drawn to scale, along with a list of construction materials and CAD drawings. Taking it down will not be an issue because without full planning permission it won't be built. I wont do anything illegal.

Good to hear £2600 is reasonable. Thanks!

Furts

Twinkle_068 wrote: »

Yes, I need full planning permission. I'm currently in the process of writing Design and Access Statements. I shall also submit Site and Location plans drawn to scale, along with a list of construction materials and CAD drawings. Taking it down will not be an issue because without full planning permission it won't be built. I wont do anything illegal.

Good to hear £2600 is reasonable. Thanks!

To reiterate earlier comments, if you do not wish to do anything illegal, and you do not want risks of pulling it down, then you need to be clear what your stance is on Buildings Regulations.

If you are going for Regulations you would be unwise to do so on a Building Notice. Bear in mind your work is specialised, and outside the scope of everyday extensions to homes. A Full Plans Application would be wise here.

System

Could be deemed a building not frequented by people? I'm currently arguing with building control to get a building into that category....

snowcat75

TBH £2600 Sounds relatively expensive to me, but would depend on access and if material dug out could be left on site.

You should also know what finishing they have included, if there adding mesh and the grade of concreate.

There's less than £400ex VAT of concreate in a poor like that and around £100 of crushed concreate. There adding a fair margin for labour.

Furts

the_r_sole wrote: »

Could be deemed a building not frequented by people? I'm currently arguing with building control to get a building into that category....

OP says there is a reception area, kitchen and storeroom. The reception concerns me. One might turn a blind eye to regulations in a back garden, or for hobby or recreation. But this is a business, inviting people through the door, to receive a service. Hence, Regulations, insurance, Duty of Care, and so on becomes topics for consideration.

System

Furts wrote: »

OP says there is a reception area, kitchen and storeroom. The reception concerns me. One might turn a blind eye to regulations in a back garden, or for hobby or recreation. But this is a business, inviting people through the door, to receive a service. Hence, Regulations, insurance, Duty of Care, and so on becomes topics for consideration.

Missed the kitchen bit, not sure where the exemption would be for this, can see how you could frame storage and a space for recieving a cat... Kitchen means a person is actually using the building for something.
Op, you need to get written confirmation from the local authority that what you are planning doesn't require building regs - not sure if you had many objections to the planning application but you can be sure if there were any, theres a danger this will be reported. And the last thing you want is retrospective regs on something that's not been designed with regs in mind