Is planning required?
Author
Discussion

nssimpson

Original Poster:

44 posts

89 months

Saturday 8th March 2025
quotequote all
Hi All, I'm hoping someone familiar with planning permission rules can help. To the front of our house it was originally built with a downstairs utility room and WC that extends forwards of the main structure. I would like to have a porch built level with this plus have the tiny office also extended level. I find it difficult to explain this so I've done a very quick mock-up in MS Paint (don't laugh too loudly)...



Would this be allowed because I'm not building further out that the existing building?

Also worth noting, no other house will be affected by this extension.

Any insights would be appreciated.

Nick

mikebradford

3,061 posts

168 months

Saturday 8th March 2025
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As long as not listed, or in a conservation area.
Less than 3m2 on plan extending forward of the building line
Eaves under 3m if within 1m of boundary, and ridge under 4m.

As such you look to be ok

smokey mow

1,340 posts

223 months

Saturday 8th March 2025
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Possibly won’t need planning but you would need building regs.

Edited by smokey mow on Saturday 8th March 07:31

Zio Di Roma

3,379 posts

55 months

Saturday 8th March 2025
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nssimpson said:
Hi All, I'm hoping someone familiar with planning permission rules can help. To the front of our house it was originally built with a downstairs utility room and WC that extends forwards of the main structure. I would like to have a porch built level with this plus have the tiny office also extended level. I find it difficult to explain this so I've done a very quick mock-up in MS Paint (don't laugh too loudly)...



Would this be allowed because I'm not building further out that the existing building?

Also worth noting, no other house will be affected by this extension.

Any insights would be appreciated.

Nick
Whilst I appreciate that your mock-up is exactly that, you are proposing to make an attractive house quite ugly. It won't help value.

Jeremy-75qq8

1,637 posts

115 months

Saturday 8th March 2025
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Agree.

nssimpson

Original Poster:

44 posts

89 months

Saturday 8th March 2025
quotequote all
It would have skylights in the roof and I'd have the wood removed and re-rendered to look more modern. Also change windows so they're no longer brown. I also wouldn't have that actual door.

BeeDeeVV

106 posts

81 months

Saturday 8th March 2025
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How far out would you actually be extending on the right, looks like they are already slightly protruding from the front door?

skeeterm5

4,439 posts

211 months

Saturday 8th March 2025
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You need planning permission.

From the planning portal.

“Rules, known as ‘permitted development’ rights, allow you to extend a house without needing to apply for planning permission if specific limitations and conditions are met.


Extension cannot be built forward of the ‘principal elevation’ or, where it fronts a highway, the ‘side elevation’.”

If it were just a porch you would be ok but you are adding the extension to the office.


Edited by skeeterm5 on Saturday 8th March 08:17

guywilko

149 posts

233 months

Saturday 8th March 2025
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You could pull the left hand roofline over the front door, but I'd leave it open and be supporting on a wooden corner post / maybe frame.

Your proposed double doors are peak South Asian multi generational housing.

Cow Corner

680 posts

53 months

Saturday 8th March 2025
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The planning portal is the place to start, it will guide you through what’s acceptable under permitted development.

While a porch is always useful and it’s hard to judge the proposed depth, I’d question whether the space gained in the office will be worth the cost of a building regs compliant extension.

nssimpson

Original Poster:

44 posts

89 months

Saturday 8th March 2025
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Here's another photo I've just taken:


Is the principle elevation the front that already sticks out further than our house?

nssimpson

Original Poster:

44 posts

89 months

Saturday 8th March 2025
quotequote all
Quick design I did:

nssimpson

Original Poster:

44 posts

89 months

Saturday 8th March 2025
quotequote all
The existing utility room and WC come out 2 metres.

skeeterm5

4,439 posts

211 months

Saturday 8th March 2025
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nssimpson said:
Here's another photo I've just taken:


Is the principle elevation the front that already sticks out further than our house?
No. It is just the “front” of the house.

Take a look at the planning portal I referenced earlier it explains it all and also has some really helpful diagrams to illustrate what it means.



G Thang

1,414 posts

51 months

Saturday 8th March 2025
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If it is far enough from the road (>5 metres), not too visible and depending on whether your neighbours are likely to complain I would just build it.

But maybe a 'garden room' in the back garden would be a better bet.

skeeterm5

4,439 posts

211 months

Saturday 8th March 2025
quotequote all
G Thang said:
If it is far enough from the road (>5 metres), not too visible and depending on whether your neighbours are likely to complain I would just build it.

But maybe a 'garden room' in the back garden would be a better bet.
It needs planning permission and building regs approval and you would ignore all of that and “just build it”? Strong choice.

nssimpson

Original Poster:

44 posts

89 months

Saturday 8th March 2025
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This is the front:


So building out level with the existing utility room and WC isn't allowed?

Hub

6,986 posts

221 months

Saturday 8th March 2025
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It needs planning permission. Have a look at the very useful Permitted Development Technical Guidance doc on the gov website. This is your scenario:


Zio Di Roma

3,379 posts

55 months

Saturday 8th March 2025
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Hub said:
It needs planning permission. Have a look at the very useful Permitted Development Technical Guidance doc on the gov website. This is your scenario:

No he doesn’t. Because he is not building forward of the current building line as marked in the diagram.

Still think it’s a daft idea though.

PhilboSE

5,764 posts

249 months

Saturday 8th March 2025
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I think that will be quite expensive to do for little actual gain, particularly so if you want to avoid nibs walls where the current front door and study window are. You would need some fairly chunky steels across both openings, total of 4 (both skins and two openings) and you would need a chunky pier between them to support the ends. Or 2 massive steels across the whole span at even more expense.

Finally as noted above, you’d be compromising the appeal of the primary elevation and it would always look like what it was. All for a place to put costs & shoes by the door, and an extra 1.5m2 of space in the study. Not a great return, IMO.