- Planning authority
- South Norfolk Council
- Postcodes
- IP22
- Noon sun, 21 March
- About 38°
- Shadow from a 5 m eaves line
- About 6.5 m
- Planning plan
- Local Plan
- County
- Norfolk
The local picture in Diss
How the two households will live together shapes the planning case as much as the drawings do. If your parent will eat with you, share the garden and rely on you day to day, an annexe is the natural fit, and that is what South Norfolk Council will expect the application to describe. If your son or daughter will run their own home, pay their own bills and perhaps sell up one day, it is a separate dwelling and will be assessed against the council’s Local Plan as a new house. For a family in IP22, we help set that out clearly from the start.
The next steps, locally
Here’s what happens next for a family home in Diss. You tell us about your plot and who the home is for, and we carry out a free desktop appraisal of access, space and the planning context. If it looks viable we visit, then set out the annexe and separate-home options. With your go-ahead we survey, design and give you a written quote, then prepare the application for South Norfolk Council.
Free plot appraisal
We look at your plot, access and the planning picture from the desk, talk through who will live in the new home, and visit if it looks viable. There’s no cost and no obligation.
Annexe or separate home
We set out both routes for your plot, covering what each means for planning, ownership, council tax, CIL and VAT, so you can decide with your family and advisers before design starts.
Planning and approvals
We prepare and submit the planning application and manage it with the council, which makes the decision. Before work starts, approval under the Building Regulations is in place and any CIL exemption has been claimed.
Build and handover
We build while you carry on living next door, with access, deliveries and working hours agreed up front. At handover you get the completion certificate and the paperwork you’ll need for council tax, lenders and any VAT claim.
Worth checking early
- An annexe tied by planning condition usually can’t be sold or let separately, which limits flexibility later.
- Planning is the council’s decision, and an annexe is not a way round the rules that apply to a new house.
- CIL exemptions are lost if work starts before the claim is made, and can be withdrawn if the home is sold or let within three years.
Your questions, answered for Diss
Who owns an annexe built in my Diss garden?
You do. An annexe stays on the title of your house and usually carries a planning condition tying it to the main home, so it can’t be transferred to the relative living in it. If a family member is paying towards it, record what they’ve put in and what happens on a sale in a written agreement drawn up by a solicitor.
Will an annexe in Diss put up my council tax?
It might. Annexes can be banded separately, but exemptions exist for annexes lived in by certain dependent relatives, and in some cases a discount applies where family live there or the annexe is used as part of the main home. Who qualifies depends on the relative’s circumstances and how the annexe is used. South Norfolk Council’s council tax team can tell you how the rules apply to your household.
Do I need planning permission for a granny annexe in Diss?
Yes, almost always for a detached annexe with its own kitchen, bathroom and bedroom. South Norfolk Council will treat it as accommodation linked to your home and will usually add a condition so it can’t be let or sold separately. A garden building used only as a home office or gym is a different matter, but sleeping and cooking take it beyond those allowances.
Can I build a separate house in my Diss garden for my son or daughter?
Possibly, if the plot can work as a home in its own right. South Norfolk Council will look at access, parking, garden space for both houses, privacy and the character of the street, as it would for any new house. If permission is granted, the plot can be transferred to your child with its own title, with your lender’s consent if the house is mortgaged.
Other options in Diss
- Plot feasibility and design
- Garage courts and yards
- Planning promotion for your garden plot
- Combine gardens with your neighbours
- Joint venture on your garden plot
- Sell subject to planning

