- Planning authority
- Rhondda Cynon Taf County Borough Council
- Postcodes
- CF38, CF72
- Noon sun, 21 March
- About 38°
- Shadow from a 5 m eaves line
- About 6.3 m
- Planning plan
- LDP
- County
- Mid Glamorgan
What shapes a plot in Llantrisant
Wherever your house sits across CF38 and CF72, a new home behind it needs water, power and two kinds of drainage — one for waste, one for rain. We contact the utility providers early, because a long cable run, a sewer at the wrong depth or a public pipe under the lawn can change both the layout and the cost.
Rain from the new roof and drive has to be dealt with on site, and Rhondda Cynon Taf County Borough Council will want to see how. Where a public sewer crosses your garden, the water company may also need a build-over agreement before work starts, so we check sewer records at appraisal stage.
The next steps, locally
From appraisal to a decision from Rhondda Cynon Taf County Borough Council, each step in Llantrisant is agreed before it starts. After the site visit we quote for survey and design; after design we prepare the application; after permission we deal with conditions and technical approvals and give you a written build quote. Each stage is a separate decision for you, with its cost set out first.
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.
Planning and approvals
We submit the planning application and manage it to a decision, then deal with conditions, Building Regulations approval, the structural warranty, any build-over agreement and the new utility connections.
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.
Llantrisant: questions to ask
Who decides planning for a garden house in Llantrisant?
Rhondda Cynon Taf County Borough Council decides applications for addresses in Llantrisant, using the council’s Local Development Plan (LDP), national policy and its own design guidance. Neighbours and consultees such as highways officers can comment, and the decision is made by the council’s planning officers or, where the rules allow, its planning committee. Pre-application advice from the council can help test a scheme before the formal application is submitted.
How long does planning take for a new home in a Llantrisant 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.
Can I build a house in my Llantrisant 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.
Will I pay Community Infrastructure Levy on a new home in Llantrisant?
Only if Rhondda Cynon Taf County Borough Council has adopted a Community Infrastructure Levy charging schedule; not every council has. Where it applies, it can be charged on a new home of any size. A self-build exemption exists for people building a home to live in, but it must be claimed before work starts, so we check the position at design stage.
Other options in Llantrisant
- Planning permission for a garden plot
- Sell subject to planning
- Garden plot option agreement
- Plot feasibility and design
- Corner and side plots
- Combine gardens with your neighbours

