Welcome to All Aspects CDF LTD, your trusted builders in Penarth. We deliver professional construction, renovation, and property development services backed by over 25 years of hands-on industry experience. Built on quality workmanship, reliability, and attention to detail, we create beautiful spaces across Penarth that are made to last.
Expand your living space with our premium home extension services, seamlessly blending new additions with your existing property.
Unlock the hidden potential in your attic space. We create beautiful, functional loft conversions tailored to your needs.
From modern bespoke kitchens to luxury bathroom suites, we handle complete refits with exceptional attention to detail.
Breathe new life into your property with our comprehensive renovation services, managing your project from start to finish.
Transform your outdoor space into a stunning retreat with our professional landscaping and patio construction services.
We also deliver high-quality commercial building and maintenance services for businesses across the region.
















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Ready to transform your Penarth property into your dream home? Whether you're planning an extension, loft conversion, or complete renovation, our experienced team is here to guide you through every step. With over 25 years of expertise across Penarth, we deliver premium quality construction that stands the test of time.
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We begin with comprehensive consultation to understand your vision and assess site conditions. Our team develops detailed plans, accurate budgets, and realistic timelines for success.
Our design phase brings your ideas to life with detailed architectural plans. We collaborate closely to refine every detail, ensuring compliance with regulations and budget.
Construction begins with careful site preparation and systematic building. Our skilled team maintains strict quality standards while keeping your project on schedule and within budget.
We complete your project with meticulous finishing touches and thorough inspections. After final walkthroughs and your approval, we hand over your completed space with ongoing support.
Have a question about your upcoming project? Browse our most common inquiries below. If you can't find what you're looking for, our team is always ready to help.
Ask a QuestionYes, absolutely. We offer completely free, no-obligation consultations and detailed quotes for all potential projects. We'll visit your property, discuss your vision, and provide a transparent breakdown of costs.
Yes, our comprehensive service includes managing the entire architectural and planning process. We work closely with local authorities to ensure all drawings and structural calculations are fully compliant and approved before work begins.
While timelines vary based on the project's size and complexity, a standard single-story rear extension typically takes between 8 to 12 weeks from breaking ground to the final finishing touches.
Yes. We carry comprehensive public liability insurance for your total peace of mind. Furthermore, as an established local business with 30 years of experience, all our construction work comes with a robust guarantee.
In most cases, no. For loft conversions and standard extensions, clients typically remain in their homes. We pride ourselves on maintaining a clean, safe, and respectful site, minimizing disruption to your daily life as much as possible.

Our head office is at 11a Royal Buildings on Stanwell Road, which makes Penarth the one town on this page we are not travelling to. We are already here. That shows up in small, practical ways: a site visit is a walk rather than a diary entry, deliveries can be met, and when something needs looking at on a Friday afternoon somebody can look at it on a Friday afternoon.
It shows up in a more important way too. Penarth is not an easy town to build in, and most of the reason is planning. The town centre sits inside a conservation area, and a conservation area does not simply mean “be tasteful” — it removes specific permitted development rights that homeowners elsewhere take for granted. Knowing which ones, before a design is drawn, is the difference between an eight-week job and an eight-week job that starts five months late.
Penarth’s planning authority is the Vale of Glamorgan Council, based at the Dock Office, Barry Docks, CF63 4RT. The Vale has 39 conservation areas — most are villages, and Penarth is the urban one. If your house is inside the boundary, three things that would be automatic elsewhere now need a full planning application.
The one that surprises people most is the roof. A roof extension or dormer is never permitted development inside a conservation area. The same rear dormer that a Barry homeowner can build without asking anyone needs full permission in central Penarth. Side extensions lose their permitted development rights too, and so does any rear extension of more than one storey. A single-storey side extension is held to 3m projection with a 1m setback from the front of the house.
Then there is the Article 4 direction. Certain Penarth properties carry one, and it pulls in works that are not structural at all — replacement windows, replacement doors, boundary walls. It was recommended by the 1994 conservation area appraisal and adopted in 1996, so it has been in force for three decades and still catches people who have just bought.
A conservation area does not stop you extending — it removes the shortcut. Source: gov.wales guidance on extensions and on loft conversions.
Wales applies one 4m limit to every house type. There is no detached-house allowance and no prior-approval route to 6m or 8m — those are England’s rules. Source: gov.wales, “Planning permission: extensions”.
The other trap has nothing to do with Penarth and everything to do with the internet. Search for how far you can extend and you will find the 6m and 8m figures, and the “prior approval” route that goes with them. That is England’s Larger Home Extension scheme and it does not exist in Wales. Here the limit is a flat 4m beyond the original rear wall, 4m high, with no extra allowance for a detached house. We have had more than one first conversation that began with a homeowner who had already had drawings done to 6m.
None of this is a reason not to build. It is a reason to find out which rules apply to your address before anyone draws anything — and the Vale publishes the conservation area maps, so it takes an afternoon, not a consultant.
Penarth was built as a Victorian and Edwardian resort, and the housing still reflects that. What a project involves here depends almost entirely on which of those layers your house belongs to:
Yes. Our head office is 11a Royal Buildings, Stanwell Road, Penarth, CF64 3ED. It is a working office, not a mailbox — you are welcome to call in. Office 02920 036 677, or Nick direct on 07519 377053.
If your house is outside the conservation area, very likely under permitted development, subject to the volume limits — under 40m³ on a terrace, under 50m³ on anything else.
If it is inside the conservation area, no: roof extensions are not permitted development there at all, so it needs full planning permission. That is not a refusal, it is an application. Plenty get approved. It just needs to be in the programme from day one rather than discovered in week three.
The Vale of Glamorgan publishes the Penarth conservation area map and the appraisal document on its website, and its Conservation & Design team can confirm an address on 01446 704626 or 704628. It is worth doing before you commission drawings rather than after.
Not in Wales. The 6m and 8m allowances come from England’s Larger Home Extension prior approval scheme, which has no Welsh equivalent. In Wales a single-storey rear extension is limited to 4m beyond the original rear wall and 4m in height, whatever type of house you have. Anything beyond that is a full planning application.
On most houses, no. On certain properties in the Penarth conservation area covered by the Article 4 direction, yes — that direction specifically brings replacement windows and doors, and boundary walls, under planning control. Check your address before you order.
Penarth town, Cornerswell, Cosmeston, Lower Penarth, the Esplanade and Penarth Marina, plus neighbouring Llandough, Sully and Dinas Powys.
Whether you're planning a small renovation or a complete transformation, we're here to help. Get in touch with our team to discuss your project, request a free quote, or arrange a consultation. We'll guide you through every step of the process.
11a Royal Buildings, Stanwell Road
Penarth, CF64 3ED
info@allaspectsconstruction.co.uk
02920 036 677
Nick (Direct): 07519 377053
120 Nantgarw Rd
Caerphilly, CF83 1AP
info@allaspectsconstruction.co.uk
02920 036 677
Nick (Direct): 07519 377053
Cardiff, Barry Town, Penarth & Sully, Dinas Powys, Caerphilly
Visit our sister company, Cardiff & Caerphilly Construction.