badgerhowlin Registered User
#1

Hi,

Does anyone know the max size a single room can be in your planning permission? Im having trouble in finding them in the Building regs.

BenK Registered User
#2

I'm not really sure what you mean. You won't find anything in the Building Regs about the max permissable size of a single room. Could you maybe give a few more details?

archtech Registered User
#3

There is no maximum size for a room. However the maximum size that can be built under exempted development (in other words without having to apply for Planning) is 40sq.m subject to satisfying certain criteria.

sydthebeat Subscriber
#4

i think the op is referring to whether a bedroom is considered single or double.

In my opinion a double bed room needs:

1. 900mm all around bed
2. space for built in wardrobe
3. space for bedside tables
4. space for desk / dresser etc

id consider anything less than 11 sq mto be a single bedroom

design standards for social housing has 11 sq m as a minimum size... page 49

design standards for apartments has 11.4 sq m as a minimum...

both also have a minimum width of 2.8 to be met.


or maybe im completely out ???

Poor Uncle Tom Registered User
#5

seanhowlin said:
Hi,

Does anyone know the max size a single room can be in your planning permission? Im having trouble in finding them in the Building regs.


We need a little more detail, are you talking about a single size bedroom as oppesed to a double size bedroom, or are you talking about the maximum size of a habitable room, or are you asking the maximum size of a single room under exempted development?

Edit: Sorry Syd just saw your post now. I was thinking bedroom as well. The maximum size of a single bedroom would equal the minimum size of a double bedroom in my books which is 11m2 as you have pointed out with 2.8 m in one one direction as a minimum.

badgerhowlin Registered User
#6

Ok,

I just got the percolation done on the site and the lad that did it was trying to work out how big the waste treatment and soak pit will be. When he asked me how many bed rooms my house will have I told him 4, 1 down stairs and 3 up stairs. So he said it will be for 8 then. Told him no it will 6, 2 doubles and 2 singles.

He told me it all depends on the size of the bedroom weather the planning lads will see it as a single or double room. When I asked him what the size was he said he didn’t know off the top of his head, but they would be in the Building regs.

Is this any clearer?

archtech Registered User
#7

Links to guidance on room sizes have been posted above by Syd. There are no room sizes as such outlined in the building regs, other than the fact that the minimum size of a habitable room should be 6.5 sq.m.
In terms of occupancy, 7 is normally the maximum taken for 4 bedroom houses.

If it was me I would rather have a some spare capacity within my septic tank/ treatment plant that be at or the limit. There may come a time where it may be necessary to add a granny flat or extra bedroom and you could run into problems with planning if the tank was at capacity.

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sydthebeat Subscriber
#8

seanhowlin said:
Ok,

I just got the percolation done on the site and the lad that did it was trying to work out how big the waste treatment and soak pit will be. When he asked me how many bed rooms my house will have I told him 4, 1 down stairs and 3 up stairs. So he said it will be for 8 then. Told him no it will 6, 2 doubles and 2 singles.

He told me it all depends on the size of the bedroom weather the planning lads will see it as a single or double room. When I asked him what the size was he said he didn’t know off the top of his head, but they would be in the Building regs.

Is this any clearer?


as this is a new build rural dwelling... dont aim to have an bedrooms under 11 sq m. Remember, kids need play rooms, studies etc

some council insist on 20 liner meters of percolation per person. So in a typical 4 double bedroomed house thats 160 linear meters, which is a lot under any guidelines. Aim for this.

Poor Uncle Tom Registered User
#9

archtech said:
If it was me I would rather have a some spare capacity within my septic tank/ treatment plant that be at or the limit. There may come a time where it may be necessary to add a granny flat or extra bedroom and you could run into problems with planning if the tank was at capacity.


+1

I think the average single domestic treatment plant is designed for PE 10, which would cater for any shock loadings from a single house with a factor of safety.

badgerhowlin Registered User
#10

Dam half my post didnt post!

Originally Posted by seanhowlin View Post
Ok,

I just got the percolation done on the site and the lad that did it was trying to work out how big the waste treatment and soak pit will be. When he asked me how many bed rooms my house will have I told him 4, 1 down stairs and 3 up stairs. So he said it will be for 8 then. Told him no it will 6, 2 doubles and 2 singles.

He told me it all depends on the size of the bedroom weather the planning lads will see it as a single or double room. When I asked him what the size was he said he didn’t know off the top of his head, but they would be in the Building regs.

Is this any clearer?

What didnt post.

Thanks sydthebeat for that link i will have a good read of it.

And also thanks to everyone else for your advice

#11

The new code of practice specifies:

The minimum plan area for a single
bedroom can be taken as 6.5 m2 and for a
double bedroom as 10.2 m2.


So any bedroom below 10.2m2 can be taken as single.

Link here - paragraph 7.1.1, page 19

Mellor Registered User
#12

Just plan for 8. Regardless of the actual number.

Remember:
Guidelines are minimums, not targets

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