DevilDamo

If the existing approval was made extant, you can still build to it. If you re-apply, then the new design would have to meet the new and current standards.

The Building Safety Act.

Sounds like you need to engage a third party to produce a full set of Building Regulation drawings.

Since when do PC’s get involved in Building Regulations?

Yes, since the introduction of the BSA in October 2023.

That isn’t just limited to the Local Authority.

Speak to your builder and see if they have a preference because after all, it’s them who’s going to be dealing with BC throughout. You want your builders to have a good relationship with the appointment of BC.

You are aware the 4 year rule ended in April?

https://architecturaltechnology.com/find-a-practice.html?q=Preston&search_by=location

https://architecturaltechnology.com/find-a-practice.html?q=Sheffield&search_by=location

@joe90 No PD rights can trigger Planning. Being a corner plot can also trigger Planning as it would depend upon which elevation is deemed as the principal elevation. The principal elevation is not necessarily or always the front elevation, which your previous comment alluded to. I’m not sure why you’re trying to pick holes in everything and taking parts of it out of context 🙄

@joe90 I am well aware of the PD rules. If the OP has a corner plot, they’d have to establish which is the principal elevation. So being a corner plot is an added restriction for homeowners to establish. Btw, my initial comment to you was stating that front dormers are not the only trigger point for needing Planning. That is unfortunately correct.

@joe90 Respectively, you implied the only reason you’d need Planning is if it related to a front dormer… which is not correct.

No PD rights, being a corner plot, having a different external finish to the house are just a few examples.

You’d have no choice but to divert it. Wouldn’t appear to be a significant additional cost when already taking into the account the cost for the re-development works.

No minimum requirement for a private dwelling.

You could extend along the blue arrow up to 50% of the original width. You could extend along the black arrow up to 4m or 8m with Prior Approval. But only if the small part sticking out is not original. You cannot extend along the red arrow without Planning. You may be better off speaking to and engaging a local Planning Consultant so they can review the Planning history, establish the restrictions and advise on the development options.

That isn’t the only trigger point.

Max it out via PD and use that to your advantage with a formal application after (and Appeal if need to). Or just build out the PD works providing you’re happy with the design solution.

The Planning Guarantee has been around for a long time. The PG for major applications is 26 weeks and 16 weeks for non-major applications (if submitted after 6th December 2023).

Ignoring the RtL thing for now, neighbours can only object on formal/Householder applications. Should you end up deciding to go down the Permitted Development route, then there is nothing the neighbour(s) can do in Planning terms.

Assuming this relates to a new build with an overall height of 8m, then the additional 500mm would require a Variation of Condition (Section 73) application.

Very easy to find… https://www.planningportal.co.uk/permission/common-projects/outbuildings/is-building-regulations-approval-needed-for-an-outbuilding

Why not introduce sliding/pocket doors?

If it’s detached and the internal floor area does not exceed 15sq.m, you don’t need to worry about the the material or distance to the boundary.