Help With Planning
Caravan Act, PD & Full Planning Explained

Granny Annexe Planning Permission in
Royston

Whether your Royston annexe needs full planning permission depends on how it’s built and how it’s genuinely used, mobile and ancillary can mean a much simpler route than permanent and self-contained. We check this properly from the outset.

Get Your Free Route Check
Local to Royston
Three Routes Explained
Council-Ready Applications

What Royston Families Need To Know About Annexes

A granny annexe in Royston 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 Royston properties, and we confirm this honestly rather than assume. A Royston annexe needing full planning permission usually needs both, our Building Regulations drawings in Royston service covers the technical compliance side, and our structural calculations in Royston service covers the engineering detail.

Right Route Confirmed

Caravan Act, permitted development, or full planning

Caravan Act Route

Movable structures that may need no permission at all

PD Size & Siting

Permitted development limits checked properly

Council-Ready

Applications built to be approved

Granny annexe planning permission

How We Help in Royston

We start every Royston annexe project by establishing the real starting point, a mobile structure within Caravan Act limits, an incidental outbuilding, or genuine independent living space, since that single distinction shapes everything that follows.

Your Royston application or certificate, whichever applies, is built around what your local council specifically expects to see, not a generic template.

Structural and building regulations work for Royston annexe projects is handled properly from the outset, informed by real experience with this kind of project.

Why Royston Families Trust Our Annexe Specialists

We tell Royston 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 Royston annexe, and we assess this honestly rather than assume either way.

Structural and building regulations detail is built into every Royston 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.

Free Route Check

Get Your Free Route Check

Royston Annexe Planning Questions Answered

What determines if my Royston annexe needs planning permission?

This genuinely depends on your specific plans for Royston, we check whether the structure is mobile, incidental, or self-contained before advising either way.

What size limits apply to a caravan-style annexe in Royston?

The Caravan Sites Act 1968 sets the limits, 20 metres long, 6.8 metres wide, 3.05 metres internal height, and the structure must be moveable by road in one or two sections, we check whether your Royston plans genuinely meet this.

What outbuilding rules apply to a Royston annexe?

It depends on genuine use, an incidental Royston outbuilding can qualify under Class E, but introducing real sleeping accommodation used independently takes it outside permitted development regardless of size.

What makes an annexe a separate dwelling in Royston?

Genuine independence is the test in Royston, if the annexe could function as a separate home on its own, full planning permission is almost always the realistic route.

Is a Lawful Development Certificate worth it in Royston?

Strongly recommended for Royston annexes, an assumption that a structure qualifies isn’t the same as formal confirmation, and a Lawful Development Certificate closes that gap.

Can you manage everything for my Royston annexe project?

Yes, we coordinate every part of a Royston annexe project, from establishing the correct route through to building regulations sign-off, so nothing falls through the gap.