- Planning authority
- Caerphilly County Borough Council
- Postcodes
- CF82
- Noon sun, 21 March
- About 38°
- Shadow from a 5 m eaves line
- About 6.3 m
- Planning plan
- LDP
- County
- Gwent
What the council will look at in Gelligaer
We cover gardens in Gelligaer and nearby places such as Nelson, Bargoed and Blackwood, with the same process wherever you are: a free desktop appraisal, a visit if the plot looks viable, then survey and design.
Some of those places may fall under a different council from Caerphilly County Borough Council, and each local planning authority has its own design guidance, validation list and pre-application service. We confirm which authority covers your address at the start, so the application is prepared for the right requirements first time and avoids delays at validation.
From first call to decision
Getting started in Gelligaer 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.
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.
- Building and selling a new home can change your tax position compared with selling only your house; take advice from a tax adviser first.
- You fund the build and carry the cost risk; ground conditions, sewer diversions or supply upgrades found later can move the price.
Gelligaer: questions to ask
Can the new home in my Gelligaer garden connect to the main sewer?
Usually, yes, but the route and depth decide how easily. The new home needs its own foul connection, agreed with the water company, and gravity drainage is simplest where the sewer sits lower than the new floor. If it doesn’t, a pumped connection may be needed. Where a public sewer runs under your garden, a build-over agreement or diversion may also be required.
How close can a new house be to my own in Gelligaer?
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 Caerphilly County Borough Council decides. Window positions, ground levels, roof shape and screening all affect what is acceptable, which is why we survey before we design.
Can I build a house in my Gelligaer 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 Gelligaer 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.
Other options in Gelligaer
- Plot feasibility and design
- Corner and side plots
- Sell subject to planning
- Garden plot option agreement
- Planning promotion for your garden plot
- Sell part of your garden

