Dennis Hellyar Architects

Dennis Hellyar Architects Dennis Hellyar Architects. An RIBA Chartered Practice.

A creative, talented, skilled, knowledgeable team producing Award Winning Residential and Commercial projects, based in Barry, Vale of Glamorgan. Dennis Hellyar Architects is a South Wales Practice providing Residential and Commercial, Architectural Services, to the region, including The Vale of Glamorgan, Cardiff & Bridgend

Thinking about extending your home or converting your loft? Before you call a builder, it's worth speaking to an archite...
31/03/2026

Thinking about extending your home or converting your loft?

Before you call a builder, it's worth speaking to an architect — and here's why.

The most expensive mistakes on home improvement projects almost always happen early. A poorly positioned extension, a loft conversion with insufficient headroom, or a planning application submitted without proper drawings — these are problems that cost far more to fix than they would have cost to avoid.

At Dennis Hellyar Architects, we work with homeowners across South Wales at every stage — from an initial chat about ideas right through to inspecting the finished work on site. We're not here to make things complicated. We're here to help you get the result you're hoping for, without the headaches.

We've written a new guide for homeowners and landlords that walks through what to expect from working with an architect, what questions to ask, and what the process looks like from start to finish.

Have a read and let us know if you have any questions

Thinking of extending your home, converting your loft, or improving a rental property? Discover why working with an experienced architect saves time, money and stress — and adds lasting value to your property.

This marks the full completion of the Lansdowne Hospital regeneration in Cardiff — 106 affordable, EPC A-rated homes on ...
12/03/2026

This marks the full completion of the Lansdowne Hospital regeneration in Cardiff — 106 affordable, EPC A-rated homes on a transformed brownfield site. A project 7 years in the making. We are delighted to have provided Architectural Services both pre-contract for and post-contract for # Lovells

A former hospital site in Cardiff has been redeveloped into a residential scheme of more than 100 new homes, with the urban renewal project handed over.

Commercial property development is fundamentally about return on investment. Yet I regularly see developers leaving subs...
28/01/2026

Commercial property development is fundamentally about return on investment. Yet I regularly see developers leaving substantial value on the table by attempting projects without proper architectural input.

In my latest article, I break down exactly how architectural design enhances commercial development returns:

Space optimisation that adds 8-20% more lettable area within the same building envelope
Energy efficiency delivering £8-12k annual operating cost savings
Site planning that extracts 20-30% more development potential from your land
First-time planning approvals saving 3+ months in costly delays
Design efficiency reducing construction costs by 8-12%

Example: On a 2,000 sqm warehouse, an 8% increase in lettable area generates £16,000 additional annual rental income (approximately £230,000 capital value at typical yields). Energy efficiency measures saving £8,500 annually add £120,000 to capital value. The combined improvements substantially exceed typical architectural fees while creating a more attractive, efficient facility.

For developers, property investors, and businesses planning commercial projects across South Wales and beyond - the numbers speak for themselves.

Read the full article: https://www.dennishellyar-architects.com/blog/commercial-property-development-why-you-need-an-architect

Commercial property development is fundamentally about return on investment. Yet developers are leaving substantial value on the table by attempting projects without proper architectural input.

Address

Romilly Park Road
Barry
CF626RN

Opening Hours

Monday 9am - 5:30pm
Tuesday 9am - 5:30pm
Wednesday 9am - 5:30pm
Thursday 9am - 5:30pm
Friday 9am - 5:30pm
Saturday 9am - 12:30pm

Telephone

+441446500720

Alerts

Be the first to know and let us send you an email when Dennis Hellyar Architects posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Share