- Planning authority
- Milton Keynes City Council
- Postcodes
- MK5, MK6, MK8, MK9, MK13
- Noon sun, 21 March
- About 38°
- Shadow from a 5 m eaves line
- About 6.4 m
- Planning plan
- Local Plan
- County
- Buckinghamshire
What shapes a plot in Milton Keynes
People living next door are consulted on every planning application, and across MK5, MK6, MK8 and MK9 that applies to a family annexe just as much as to a new house. Their privacy, outlook and light carry real weight with Milton Keynes City Council. A design that keeps upper windows away from adjoining gardens, uses obscure glazing where it has to, and leaves a planted margin along the boundary gives the council fewer reasons to refuse. A quiet word with the people either side before the application goes in is often worthwhile too.
How we’d take it forward in Milton Keynes
Getting started in Milton Keynes costs nothing. Send us a few photos of your garden and the way in, or simply call, and we’ll look at the plot from the desk and talk through your family’s plans. If there’s a realistic scheme, we arrange a site visit. Survey and design are quoted in writing before you commit, and the build price follows once the design is settled.
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.
Survey and design
A measured survey, then a design built around the person moving in: step-free routes, a ground-floor bedroom if needed and privacy for both households. You get a written quote after design and survey.
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.
Worth checking early
- CIL exemptions are lost if work starts before the claim is made, and can be withdrawn if the home is sold or let within three years.
- An annexe tied by planning condition usually can’t be sold or let separately, which limits flexibility later.
- Family plans change: agree ownership, costs and what happens if circumstances change in writing, with a solicitor.
Your questions, answered for Milton Keynes
How much garden do I need for a family home in Milton Keynes?
There’s no fixed figure. A single-storey annexe close to the house can work on a smaller plot than a separate dwelling, which needs its own garden, parking and access. What matters is whether Milton Keynes City Council can be satisfied on privacy, daylight and the space left for both homes. The free appraisal gives you a first view based on your plot’s actual shape and access.
Can I reclaim VAT on a family annexe in Milton Keynes?
Often not. HMRC’s guidance gives an annexe that can’t be used or sold separately from the main house as an example of work that can’t be zero-rated, and the DIY housebuilders refund scheme asks the same question. A separate dwelling is usually treated differently. Take advice from a tax adviser before you settle the planning route, because the wording of the permission matters.
Can you design a home in Milton Keynes for a relative who uses a wheelchair?
Yes. The design can include a level approach and threshold, turning space in each room, a wet room, wider doors and worktops at a usable height. Where Milton Keynes City Council requires a particular access standard through planning, the design meets it; otherwise it’s your choice how far to go. Input from your relative’s occupational therapist is well worth having.
Who owns an annexe built in my Milton Keynes 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.
Other options in Milton Keynes
- Tandem and landlocked plots
- Plot feasibility and design
- Planning permission for a garden plot
- Planning promotion for your garden plot
- Garage courts and yards
- Combine gardens with your neighbours

