Cardiff — CF14
Builders in Llanishen, Cardiff
Bespoke residential, New builds — delivered by one accountable team from our Blackwood base. Bespoke, from the ground up.
Building in Llanishen
Bespoke residential in Llanishen and the surrounding CF14 area
Llanishen's family streets and proximity to Lisvane make it one of north Cardiff's most practical places to build, extend or rebuild a home to a bespoke standard. Jac Jones Construction serves Llanishen and the surrounding CF14 areas with bespoke residential construction and new builds — from a plot and an idea to a finished home, or a finished drawing package built properly.
Llanishen projects are usually about making family houses work harder: more space, better light, modern performance. We manage structure, groundworks and finish under one roof, so a new build or major rework is delivered by the same accountable team throughout.
- Area served
- Llanishen and surrounding CF14
- Region
- Cardiff
- Focus
- Bespoke residential, New builds
- Based
- Blackwood, Caerphilly — on site daily
Bespoke homes
From a plot and an idea, or drawings ready to build.
We build bespoke homes in and around Llanishen the way we build our own developments — because we have been the developer as well as the contractor. That means honest appraisal of the plot and the budget before anyone breaks ground, engineering resolved on paper rather than on site, and one line of responsibility from concept to keys. If you already have an architect, we work alongside them; if you do not, we introduce practices we have delivered with for years.
Groundworks & civils
In-house, on our own plant.
Everything we build sits on ground we have prepared ourselves. In and around Llanishen, our in-house groundworks team delivers site strip, foundations, land drainage, SAB and SuDS-compliant surface water infrastructure, retaining works and finished external levels — on our own plant, managed by our own site managers.
Project evidence
Relevant projects near Llanishen
Real projects in their true locations — where work is in a neighbouring area, we say so.
One line of responsibility
From an idea to the keys.
Concept, design, planning, engineering, groundworks, structure, build, internals, external works, handover — one accountable company throughout.
01
Idea or plot
A site, a sketch, or nothing more than an intention.
02
Design
Architects who work the way you want to live.
03
Planning & consultants
Applications, SAB, drainage, energy assessment.
04
Engineering
Structural design resolved before anyone breaks ground.
05
Groundworks
Our own team, our own plant, in the ground.
06
Construction
Trades we have worked with for years.
07
Completion
Snagged, handed over, and stood behind.
Why Jac Jones Construction
Built like a business we still own.
Established 2013
A decade-plus building homes, pools and groundworks across South Wales — still founder-led, still family-run.
Contractor and developer
We have funded, built and sold our own developments. We understand cost, risk and finish from the client's side of the table.
In-house groundworks
Our own operators and plant, from small excavators for tight gardens to 8-tonne machines. The ground is never someone else's problem.
Trusted network
Architects, structural engineers, planning consultants and trades we have worked with for years — introduced where your project needs them.
Nearby
We also work around Llanishen
Common questions
Questions about building in Llanishen
- Do you build bespoke new homes in Llanishen?
- Yes. We serve Llanishen and the surrounding CF14 area from our base in Blackwood, delivering complete bespoke homes from an idea and a plot, or from a finished drawing package. Groundworks, structure, internals and external works are all handled by one accountable team.
- Can Jac Jones Construction manage a project from design through to completion?
- Yes — design and build is a core part of how we work. We can introduce trusted architects, structural engineers, planning consultants, SAP assessors and drainage specialists, then manage the project through planning, engineering and construction to handover. If you already have a design team, we work alongside them.
- Can you undertake the groundworks as well as the house build?
- Groundworks are delivered in-house on our own plant — excavation, foundations, reinforced concrete, retaining structures, drainage and external works. On constrained or sloping sites around Llanishen this is often the difference between a smooth build and an expensive one.
- What information do you need to price a bespoke new build?
- Ideally a drawing package, but a plot and a clear idea are enough to start a sensible conversation. We will tell you honestly what stage the project is really at, what it is likely to involve and what we would need to give you a properly itemised price.
- Do you undertake SAB and drainage works as part of a new build?
- Yes. Surface-water drainage for new builds in Wales requires SAB approval, and SuDS features are designed into our schemes from the start. Our groundworks division builds the drainage and attenuation infrastructure as part of the normal package.
- Which surrounding areas do you cover?
- Alongside Llanishen, we regularly work across Lisvane, Rhiwbina, Whitchurch, Cyncoed and Old St Mellons and the wider South Wales region. Exceptional projects further afield — including Bristol and West Wales — are considered on their merits.
- How early should I contact you before I want construction to begin?
- Earlier than most people think. A conversation at plot-or-idea stage lets us flag ground, access, drainage and budget realities while they are still cheap to solve — but we are equally happy to be brought in with completed drawings ready to price.
Start here
Planning a project in Llanishen?
Tell us what you are planning in Llanishen or the surrounding CF14 area — it takes about two minutes and there is no budget interrogation.
Would rather talk it through? Call 07446 832296