Barnsley Hewett & Mallinson, Architects

About Barnsley Hewett & Mallinson, Architects

Barnsley Hewett & Mallinson is an architectural practice with a well-established presence in south-west London, operating from Studio 14 at the Old Power Station on Mortlake High Street — a characterful address that sits on the border of East Sheen and Mortlake. The practice offers design and planning services for both residential and commercial projects, making them a practical first port of call for homeowners considering extensions, conversions or new builds, as well as businesses with more complex architectural needs. The team works standard office hours across a full five-day week.

Local area

East Sheen and the surrounding streets are dominated by handsome Edwardian and inter-war housing — the kind of stock that rewards careful, sympathetic architectural thinking when owners want to extend or adapt. With Richmond Park on the doorstep and conservation sensitivities common across the borough, having an architect who understands the local planning environment is genuinely valuable. Barnsley Hewett & Mallinson’s base at the Old Power Station in Mortlake places them squarely within this community, well positioned to serve homeowners and businesses across Richmond upon Thames and Barnes alike.

Why choose Barnsley Hewett & Mallinson, Architects

For residents in East Sheen, Barnes or the wider Richmond borough, working with an architect who is locally based rather than centrally located can make a real practical difference — site visits are straightforward, local planning contexts are familiar, and conversations can happen without significant travel on either side. Barnsley Hewett & Mallinson offer consistent weekday availability across a full 9am to 5:30pm day, making it straightforward to arrange appointments around other commitments. Their Mortlake address, within the borough itself, suggests a practice genuinely embedded in the communities it serves.

Services

• Residential architectural design
• Commercial architectural design
• Planning permission applications
• Building design consultation
• Extension and conversion design
• Project feasibility advice

Ideal for: Local homeowners planning extensions or renovations, Residential property developers, Commercial property owners, Small business owners requiring premises design, Residents in period or heritage properties.

Frequently asked questions

Where exactly are Barnsley Hewett & Mallinson based, and is it easy to visit?

The practice is located at Studio 14, The Old Power Station, 121 Mortlake High Street, London SW14 8SN. The Old Power Station is a well-known local landmark on Mortlake High Street, accessible by bus and within easy reach of East Sheen and Barnes.

What days and hours are the practice open?

The office is open Monday to Friday, 9am to 5:30pm. The practice is closed on Saturdays and Sundays.

Do they work on residential as well as commercial projects?

Yes — the practice offers design and planning services for both residential and commercial projects.

How can I get in touch to discuss a project?

You can call the practice on 020 8878 4667 during office hours, Monday to Friday, or visit their website at bhmarchitects.com for further information.

Is this an independent local practice or part of a larger group?

Based on the available information, Barnsley Hewett & Mallinson operates as an independent architectural practice from its studio at the Old Power Station in Mortlake.