- Planning authority
- Rhondda Cynon Taf County Borough Council
- Postcodes
- CF45
- 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 Mountain Ash
For a corner or side plot in Mountain Ash, the decision rests with Rhondda Cynon Taf County Borough Council. Its starting point is the council’s Local Development Plan (LDP), read alongside national policy and any design guidance it has adopted, which usually covers how a new home should line up with, space itself from and match the height of the houses around it.
Our designs begin with those documents rather than a standard house type. Where it helps, we seek pre-application advice, so the home we propose answers local expectations before an application goes in.
From first call to decision
You stay in control after the appraisal. Selling means heads of terms in writing, read by your solicitor, before anything is signed. Building means survey and design ahead of a written quote. Whichever you choose, Rhondda Cynon Taf County Borough Council receives the application and asks your neighbours for comments, and a decision on a single home often takes a few months, longer if the design needs amending.
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.
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.
Sale or build
For a sale, your solicitor handles the transfer of part and any release from your lender. For a build, a written quote follows design and survey, then we build, arrange the warranty and hand over.
Worth checking early
- Corners kept open by design can be harder to build on than they look; character can matter more than space.
- Losing a side garden or drive changes how your house works day to day, from parking to getting bins round the back.
- Attaching a home to yours brings party wall, fire and sound separation work, and changes the feel of your own house.
Your questions, answered for Mountain Ash
Is my Mountain Ash 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.
Can I attach a new home to my house in Mountain Ash?
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.
Can you build a home beside my house in Mountain Ash for my family?
Yes. A home next door can give a parent or grown-up child their own front door while keeping them close. You keep the land; we draw the house, apply for permission, build it and arrange the structural warranty or other cover lenders accept. The written quote comes after design and survey.
Is there a fee for checking my side plot in Mountain Ash?
There’s no fee. The appraisal is free and you’re under no obligation. We work from maps, the title and a phone call first, and only visit if the plot seems worth it. Nothing binds you until you’ve picked a route and read the written terms.
Other options in Mountain Ash
- Plot feasibility and design
- Build a home for family in your garden
- Large rear gardens
- Bungalows on large plots
- Garden plot option agreement
- Planning promotion for your garden plot