Planning guidance
Planning permission for extensions in Kent — what to know first
Get the planning route wrong and you waste months redrawing. This guide covers when Medway and Kent homeowners usually need permission — and how we help you keep the project moving.
Permitted development vs full planning
Many rear extensions fall under permitted development if they meet depth, height and material guidelines. Corner plots, conservation areas, listed buildings, flats and larger two-storey schemes often need a full planning application.
We are not just builders — we work closely with design professionals and will help see your project through the planning process all the way through to completion.
- Check previous extensions and existing property
- Measure proposed depth and eaves height
- Consider highways and neighbour amenity
- Confirm if your property has restrictive covenants
Building regulations still apply
Even when planning permission is not required, building regulations almost always are. Foundations, structure, insulation, electrics, fire safety and drainage all need to be done properly and signed off.
Homeowners sometimes mix the two up. Planning is about whether you can build the shape you want. Building control is about whether it is safe and up to standard. You can sail through permitted development and still fail an inspection if the detail is wrong.
How Napwood supports the process
We help you brief designers, sense-check what will actually build cleanly on a Medway plot, and programme the works once approvals are in place. Drawings that look lovely on paper still need to work with drainage runs, steels and access for materials.
If a Lawful Development Certificate makes sense for peace of mind when you sell, we will say so. If you need a full householder application, we stay involved so the build does not stall after the decision notice lands.
FAQs
Frequently asked questions
What is a Lawful Development Certificate?
It is formal confirmation from the council that proposed works are lawful without planning permission. Many homeowners get one so solicitors and buyers do not query the extension later.
How long do planning applications take?
Householder applications often aim for around eight weeks, though neighbour comments, amendments or busy periods at Medway or neighbouring Kent councils can stretch that.
Can neighbours stop my extension?
Neighbours can comment on a planning application. That is different from a party wall agreement, which is a separate process and may still be needed even if planning is not.
Do you submit planning applications for us?
We work with design professionals who prepare and submit applications. Our role is making sure the scheme is buildable, realistic on cost, and followed through to completion on site.
Ready to discuss your project? Call us or request a free estimate today.
Contact Napwood