- Planning authority
- Merthyr Tydfil County Borough Council
- Postcodes
- CF46
- Noon sun, 21 March
- About 38°
- Shadow from a 5 m eaves line
- About 6.3 m
- Planning plan
- LDP
- County
- Mid Glamorgan
How it plays out in Treharris
A home placed behind another changes the light as well as the traffic. In Treharris the sun peaks at roughly 38° in late March and barely 15° at the winter solstice, so shadows from even a modest building stretch a long way across a garden in the darker months.
That is why many tandem schemes use a single-storey or low-eaves design. It keeps upstairs windows from looking over neighbours and limits shadow. Merthyr Tydfil County Borough Council decides, and its own guidance on separation distances sets the gaps it expects.
What happens next in Treharris
The first step is a free, no-obligation appraisal. For a Treharris plot with a difficult way in, that means checking who owns each part of the route, what rights exist and how wide it is on the ground. If a neighbour or a ransom strip is involved, we agree an approach with you before contacting anyone.
Free plot appraisal
We start with the access, not the plot: title plans, rights of way, the width on the ground and the route to the road. It’s a desktop check and a conversation, with a site visit if it looks viable, at no cost.
Title and access check
With your solicitor we confirm who owns every strip between the plot and the road, what rights already exist and whether they cover a new home. Any ransom strip or missing right shows up at this stage.
Secure the way in
If a right of way needs widening, a strip needs buying or a neighbour needs to come in, we agree the approach with you and negotiate it, so the terms are settled before planning money is spent.
Planning application
We design a layout that answers the access, privacy and neighbour questions councils ask about tandem and backland plots, then apply. The council consults neighbours and decides, and the decision is always the council’s.
Worth checking early
- Long or narrow drives can mean extra cost for sprinklers, passing places, lighting or a bin collection point.
- Access is usually the deciding factor on these plots, so a large plot with a poor way in may not be a building plot at all.
- A right of way that has served a garage or field for years may not legally cover a new house.
Treharris: questions to ask
Could my neighbour and I in Treharris share one new access?
Often, yes. If both your gardens are long, combining them can give one shared drive and a better layout than either garden alone. Each owner keeps their house, and a written agreement sets out how the value is shared fairly.
How do I find out if a lane behind my Treharris home is a public road?
The highway authority keeps a list of streets maintained at public expense, and anyone can inspect it free of charge. If the lane isn’t on it, it’s probably private, and you’ll need to know who owns it and whether your title gives a vehicle right of way that would cover a new home.
Can I get planning permission in Treharris before the access is sorted?
You can apply for planning on land you don’t own, as long as the owners are formally notified. But permission doesn’t give a right to cross anyone’s land. Most of the time it makes sense to agree access terms first, so the permission can actually be used.
Can I build behind my house in Treharris if the only way in is my drive?
Possibly. That would be a tandem layout, with the new home behind yours sharing your drive. Merthyr Tydfil County Borough Council will look at the effect of cars passing your house, privacy, garden space and whether it suits the area. Fire and bin access also need checking. The decision is the council’s, and a good design improves the odds.
Other options in Treharris
- Combine gardens with your neighbours
- Sell part of your garden
- Garage courts and yards
- Corner and side plots
- Build a home for family in your garden
- Planning permission for a garden plot