Getting a Belper granny annexe wrong on paper costs far more than getting it right first time, the structural, planning, and building regulations elements all need to align properly.
Get Your Free Route CheckA granny annexe in Belper can follow three genuinely different routes. A structure that meets the legal definition of a caravan under the Caravan Sites Act 1968, capable of being moved by road in one or two sections and within maximum dimensions of 20 metres by 6.8 metres with an internal height of 3.05 metres, can often be sited without planning permission provided it remains ancillary to the house.
An outbuilding used incidentally to the enjoyment of the house, a home office, gym, or storage, can fall under Class E permitted development, but the moment it includes genuine sleeping accommodation used independently, it’s no longer considered incidental, and permitted development stops applying.
Where neither route fits, a full planning application is the reality for Belper properties, and we confirm this honestly rather than assume. A Belper annexe needing full planning permission usually needs both, our Building Regulations drawings in Belper service covers the technical compliance side, and our structural calculations in Belper service covers the engineering detail.
Caravan Act, permitted development, or full planning
Movable structures that may need no permission at all
Permitted development limits checked properly
Applications built to be approved
Every Belper annexe enquiry starts with establishing the real facts, is the structure genuinely mobile within Caravan Act limits, is it staying incidental to the house, or is it a self-contained dwelling, since that shapes the whole route.
From there, we prepare exactly what your Belper project needs, whether that’s a Lawful Development Certificate confirming caravan or permitted development status, or a full planning application.
Structural and building regulations input runs alongside the planning process for Belper annexe projects, whichever route applies.
We tell Belper families honestly whether their annexe genuinely qualifies for the Caravan Act or permitted development routes, rather than defaulting every enquiry to a full application.
Getting the self-containment question right matters more than almost anything else for a Belper annexe, and we assess this honestly rather than assume either way.
Structural and building regulations detail is built into every Belper annexe project from the start, whichever planning route applies. If you need help with a granny annexe, give us a call on 0330 133 5316 or fill in the form below.
It depends on three things, whether the structure genuinely qualifies as a caravan under the Caravan Sites Act, whether it stays incidental to the house under permitted development, or whether it’s a self-contained dwelling, which almost always needs a full application in Belper.
Under the Caravan Sites Act 1968, a structure qualifies as a caravan if it’s capable of being moved by road in no more than two sections, and doesn’t exceed 20 metres in length, 6.8 metres in width, or 3.05 metres in internal height, Belper annexes meeting this can often avoid planning permission if they stay ancillary to the house.
Only if it stays genuinely incidental to the house, Belper outbuildings under Class E permitted development cannot be separate, self-contained living accommodation, the moment sleeping facilities are used independently, permitted development stops applying.
A Belper annexe with its own bedroom, bathroom, and kitchen, used independently of the main house rather than as shared accommodation, is generally treated as self-contained, which usually means full planning permission is needed.
We recommend it, even where your Belper annexe genuinely qualifies as a caravan or permitted development, a Lawful Development Certificate gives you written confirmation rather than an assumption that could cause problems later, particularly when selling.
Yes, we handle the full picture for Belper annexe projects, the planning route, whichever applies, and building regulations compliance, as one coordinated service.