- Planning authority
- Bannau Brycheiniog National Park Authority
- Postcodes
- LD3
- Noon sun, 21 March
- About 38°
- Shadow from a 5 m eaves line
- About 6.4 m
- Planning plan
- LDP
- County
- Powys
Before you decide in Brecon
Daylight is one of the first things Bannau Brycheiniog National Park Authority will check on a garden house. At midday on 21 March the sun in Brecon stands roughly 38° above the horizon, so an eaves line about 5 m high casts a shadow of around 6.4 m. On 21 December the sun is only about 15° up and shadows stretch far longer.
That’s why the gap between your house and the new one, and the height of the new roof, are set by measurement rather than guesswork. A lower eaves line, a hipped roof or a single-storey section can make a real difference to the gardens either side.
The next steps, locally
Getting started in Brecon takes one step from you: send your address and a few photos of the garden, or call us. We check the title plan, access and planning constraints from our desk, then talk the plot through. If it looks viable we arrange a visit, discuss whether you want to sell, let or keep the new home, and set out the survey and design stage in writing before you commit.
Free plot appraisal
We check the title plan, access, constraints and planning policy from our desk, talk the plot through with you, and visit if it looks viable. There’s no cost and no obligation.
Survey and design
A measured survey records levels, boundaries, trees and neighbouring windows. We then design a layout and house that suit the plot, the street and your budget, and decide whether pre-application advice is worth seeking.
Written quote and build
Once design and survey are complete you get a written quote. The build runs in stages — access and groundworks, foundations, frame and roof, fit-out and external works — with inspections at each key point.
Handover
You receive the completion certificate, warranty documents, Energy Performance Certificate, manuals and utility details, so the new home is ready to move into, let or put on the market.
Worth checking early
- Planning can be refused, and money spent on surveys, design and the application isn’t recovered if it is — which is why we start with an appraisal.
- A build next door means months of noise, deliveries and contractors near your home; good planning reduces the disruption but doesn’t remove it.
- Your own garden gets smaller and the new home will be visible from your house, so screening and separation matter for both homes.
Questions about garden plots in Brecon
Can I build a house in my Brecon garden and then sell it?
Yes. You keep the land while the home is built, then sell the finished house. Before building starts, the plot should be given its own title through a transfer of part at HM Land Registry, and if your house is mortgaged your lender must agree to release the plot. Selling a home you’ve built can change your tax position, so take advice from a tax adviser first.
How long does planning take for a new home in a Brecon garden?
The statutory period for deciding a minor application, such as a single new home, is 8 weeks from the date the council receives a valid application, in both England and Wales. In practice many applications take longer, and the council may ask you to agree an extension in writing. Surveys and design before submission add time, and conditions may need approving afterwards.
How close can a new house be to my own in Brecon?
There’s no single national distance. Many councils use separation guides of around 21 metres between facing back windows and around 12 to 15 metres between a back window and a blank side wall, but the guidance used by Bannau Brycheiniog National Park Authority decides. Window positions, ground levels, roof shape and screening all affect what is acceptable, which is why we survey before we design.
Do new homes in Brecon need a structural warranty?
If the house will ever be sold or mortgaged, in practice yes. Mortgage lenders usually expect a 10-year structural warranty on a new home, though some accept an architect’s or surveyor’s certificate, and a warranty provider inspects the work at stages during the build, so it has to be in place before construction starts. Building control approval is separate and also required; a buyer’s solicitor will ask for both.
Other options in Brecon
- Corner and side plots
- Joint venture on your garden plot
- Build a home for family in your garden
- Garden plot option agreement
- Sell part of your garden
- Plot feasibility and design

