breeze block garden room budget?

butterpie

Hello all,
I would like to have a breeze block room built at the bottom of my garden to be used as a gym and also office.
It will be flat roof, 2.5m high and either
1) 5m wide x 6m long, with a partition so we can use 1/3 as storage
or
2) 3.5m wide x 6m long office, and a storage Lean-To built next to it.

I'm wondering can anybody offer a very ball park figure for how much I should budget for this? We are within the M25

Also does it have to be double skin block with a cavity in order to be warm enough to use as office?

many thanks in advance for any wisdom shared

bp

FiremanDave

butterpie wrote: »

Hello all,
I would like to have a breeze block room built at the bottom of my garden to be used as a gym and also office.
It will be flat roof, 2.5m high and either
1) 5m wide x 6m long, with a partition so we can use 1/3 as storage
or
2) 3.5m wide x 6m long office, and a storage Lean-To built next to it.

I'm wondering can anybody offer a very ball park figure for how much I should budget for this? We are within the M25

Also does it have to be double skin block with a cavity in order to be warm enough to use as office?

many thanks in advance for any wisdom shared

bp

A lot depends on how you want it to look after and the quality of internal finish. Why are you going for block rather than brick? I take it your house is rendered and you want to match that.

Without knowing ground type, how far away from your house to run services etc. you'll get something nice for 30k.

butterpie

thanks for reply firemanDave. reason for rendered block is purely cost. also house is rendered yes. its at the bottom of 80ft garden but council prefer it to match existing house.
crumbs, I was hoping for under 15k. may have to consider a SIPS garden room instead

FiremanDave

I'm sure you can get it for under 15k, depends on what you decide to go for.

Get some plans drawn up and get some local builders to quote you.

neneromanova

Why not try SIPs panels? http://www.sips-panelsuk.com/100360/info.php?p=4

Robboseven

I know this may be obvious but have you considered a log cabin? Much cheaper, easy to insulate and erect yourself or pay for a couple of days handyman's labour.


Not a permanent structure either so no planning issues as long as you don't sleep in it!

cyclonebri1

butterpie wrote: »

Hello all,
I would like to have a breeze block room built at the bottom of my garden to be used as a gym and also office.
It will be flat roof, 2.5m high and either
1) 5m wide x 6m long, with a partition so we can use 1/3 as storage
or
2) 3.5m wide x 6m long office, and a storage Lean-To built next to it.

I'm wondering can anybody offer a very ball park figure for how much I should budget for this? We are within the M25

Also does it have to be double skin block with a cavity in order to be warm enough to use as office?

many thanks in advance for any wisdom shared

bp

Given the use and the size it needs no building regs compliance.
It's not habitable accommodation

But, to make it usable in winter, do as you say,, make it cavity wall construction.

Just remember the vast majority of the heat will escape through the roof , so build accordingly.

onomatopoeia99

Robboseven wrote: »

Not a permanent structure either so no planning issues as long as you don't sleep in it!

I don't think the permanence of a structure makes any difference to planning. If I build a 10m high log cabin in my garden I'm sure the planning department will be interested, permanent or not!

Building from wood rather than concrete potentially affects building regs if the internal area is over 15sq m and it is near a boundary.

Ozzuk

You could probably do it for 5k if you did it yourself, however for a builder and depending on finish I'd say 12k but its a total guess without understanding what the ground is like, drainage, finish, electrics, heating etc. You can get solar heat exchangers pretty cheap.

I built a 30ft log cabin a few years ago, that was prob around the 5k mark but I didn't go for the double skinned one. Never again, really did not age well.

Doozergirl

onomatopoeia99 wrote: »

I don't think the permanence of a structure makes any difference to planning. If I build a 10m high log cabin in my garden I'm sure the planning department will be interested, permanent or not!

Building from wood rather than concrete potentially affects building regs if the internal area is over 15sq m and it is near a boundary.

The proposed height and flat roof combination wouldn't make it a planning issue if the house hasn't had PD rights removed for whatever reason. Proximity to boundaries may.

butterpie

Hi all, thanks for such good advice and feedback.

According to building control surveyor, its within permitted development.
He says it can be built from wood as long as its got at least 30 minutes fire rating on interior and exterior cladding. He recommends EML with concrete render for exterior as the fire proofing would last longer than wood cladding painted with fire proof paint.
He also recommends a good quality insulated concrete base.
He thinks wood frame insulated with kingspan or celotex is better than SIPS for smaller builds like this.

I've had one builder came round so far. He quoted at least 25k+ for breeze block option. When I asked how much if we don't put a toilet in and make it 40% smaller he said its the same price. Won't bother with him