Introducing sleeping accommodation into a Lewes outbuilding changes its planning status entirely, from incidental permitted development to something that almost always needs a full application. We assess your specific project honestly.
Get Your Free Route CheckThree routes exist for a Lewes granny annexe, and which one applies depends on genuine facts about the structure, not assumptions. The Caravan Sites Act 1968 defines a caravan by size, 20 metres by 6.8 metres, 3.05 metres internal height, and mobility, capable of being moved by road in one or two sections.
Class E permitted development covers incidental outbuildings in Lewes, but excludes anything used as separate, self-contained living accommodation, the introduction of sleeping facilities used independently changes everything.
Where your Lewes annexe doesn’t fit either of the simpler routes, a full planning application is the honest answer, and we confirm this properly rather than guess. A Lewes annexe needing full planning permission usually needs both, our Building Regulations drawings in Lewes service covers the technical compliance side, and our structural calculations in Lewes 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 Lewes annexe enquiry starts with the same honest question, mobile caravan, incidental outbuilding, or genuine separate dwelling, since the answer determines everything that follows.
From there, we confirm the correct route for your Lewes project and prepare exactly what’s needed, a Lawful Development Certificate or a full planning application.
Structural detail and building regulations compliance for Lewes annexes are handled properly throughout, not bolted on at the end.
Getting the classification right for a Lewes annexe, mobile, incidental, or self-contained, matters as much as the design itself, and we treat both with equal seriousness.
Every Lewes annexe project gets an honest assessment against all three routes, not a default assumption that the most complex one applies.
We coordinate structural and building regulations work for Lewes annexes properly, since getting this wrong can hold up an otherwise straightforward project. If you need help with a granny annexe, give us a call on 0330 133 5316 or fill in the form below.
Not automatically, a mobile structure meeting the Caravan Act’s size and mobility test, or a genuinely incidental outbuilding, can potentially avoid it in Lewes, but a self-contained annexe with its own facilities used independently usually can’t.
Yes, potentially, if your Lewes annexe meets the legal size limits, 20 metres by 6.8 metres by 3.05 metres internal height, and is genuinely capable of being moved by road, it may qualify as a caravan under the 1968 Act.
Class E permitted development in Lewes covers incidental structures like a home office or gym, subject to height and coverage limits, but not genuine independent living accommodation with its own bedroom, bathroom, and kitchen.
Once a Lewes structure functions as independent living space, its own facilities, used separately from the household, it’s no longer incidental, and neither permitted development nor the Caravan Act route typically applies.
Yes, this is genuinely worth having for Lewes projects, confirming the position in writing protects you if the classification is ever questioned, especially at the point of sale.
Absolutely, Lewes annexe clients get the planning classification and building regulations detail handled together, not as separate, disconnected pieces of work.