- Planning authority
- Powys County Council
- Postcodes
- SA9
- Noon sun, 21 March
- About 38°
- Shadow from a 5 m eaves line
- About 6.3 m
- Planning plan
- LDP
- County
- Powys
What the council will look at in Ystradgynlais
A new home beside yours affects light to your side windows and your neighbour’s. Around the spring equinox, the noon sun over Ystradgynlais climbs to roughly 38°, and a 5 m eaves line then casts a shadow close to 6.3 m long. By December the midday sun reaches only about 15°, so the same wall shades far more ground.
On a side plot that shadow may fall across your own flank wall or the neighbour’s garden. We model it for your actual plot, and adjust the footprint, roof shape or gap at the side so the new home doesn’t take more light than it should.
The next steps, locally
Give us your Ystradgynlais address and a sense of what you’re hoping for. Our desktop review covers the policies Powys County Council works to, recent applications on nearby side and corner plots, and anything in your title that might restrict building. A clear result leads to a visit when it suits you, after which we explain each route and what it would mean in practice.
Free plot appraisal
We look at your plot on maps, the title plan and street views, check planning history nearby and talk it through with you. If a home beside yours looks possible we visit. No cost, no obligation.
Read the street
We measure the plot and record the building line, the gaps between houses, roof heights, materials and boundary walls, then check where a new drive could go and what drivers would be able to see from it.
Choose your route
Sell the plot outright, sell it subject to planning, or grant an option while you keep your house. Or keep the land and have us design, get planning for and build a new home on it.
Design and planning
We draw a home that sits in the street rather than fighting it, usually take pre-application advice, and submit the application. The council consults neighbours and decides; small schemes often take a few months.
Worth checking early
- Attaching a home to yours brings party wall, fire and sound separation work, and changes the feel of your own house.
- The council decides, and neighbours are consulted; a sensible design can still be refused or need changes.
- A new drive close to a junction may not be acceptable to the highway authority, which can force a different layout.
Ystradgynlais: questions to ask
Can I attach a new home to my house in Ystradgynlais?
Yes, where it suits the street, for example on the end of a semi-detached pair. It needs planning permission as a separate home, fire and sound separation under Building Regulations, and possibly a party wall agreement. We check whether attached or detached fits your road better.
Which body approves a new home on a side plot in Ystradgynlais?
The planning decision belongs to Powys County Council. It checks the proposal against the council’s Local Development Plan (LDP), national policy and its own design guidance, and asks neighbours and the highway authority for their views first. Our role is to prepare and submit a strong application; approval or refusal is the council’s call alone.
Is my Ystradgynlais side garden wide enough for a new house?
It depends on how wide homes are in your street, the gaps between them, whether the new home would be attached or detached and what the council’s design guidance says. There’s no single minimum width. We measure your plot and the street as part of a free appraisal.
Will a new drive near the corner be allowed in Ystradgynlais?
Only if drivers would have a clear enough view of the road and the junction stays safe. The highway authority comments on this and controls new dropped kerbs. Drives very close to a corner are often resisted, so we check the position on site before designing.
Other options in Ystradgynlais
- Bungalows on large plots
- Build a new home in your garden
- Garden plot option agreement
- Tandem and landlocked plots
- Planning permission for a garden plot
- Garage courts and yards

