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Seth White Architects are an award-winning, RIBA chartered practice based in St Albans, Hertfordshire. We specialise in residential new builds, extensions and refurbishments, along with heritage projects set within conservation areas and listed buildings. 

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Macaulay Road interior living room

These 3no. contemporary (new build) townhouses near Clapham Common are 6 storeys tall offering over 6500ft2 of accommodation. They contain 6/7 bedrooms, 4 bathrooms, open plan kitchen/ dining/ garden room, family room and formal living room, external terraces and generous landscaped gardens.

Chapelfields kitchen 6

This rear extension and internal reconfiguration project in Wilstone has transformed the existing 1980's home with the addition of a new open plan kitchen/ dining/ living space that focuses views across the Chilterns and provides light filled spaces deep into the plan.

Watford Road extension St Albans


This 1920's property in St Albans was extensively remodeled and extended across three storeys to provide our clients with a beautiful 5 bedroom, 3 bathroom  'forever family home'. The rear facing kitchen/ dining and veranda spaces open up onto the landscaped garden area and the Master bedroom on the top floor benefits from this stunning views from the Juliet balcony.

The Ridgeway kitchen St Albans

The Ridgeway
St. Albans

This contemporary extension project on The Ridgeway in St Albans was completed in 2022. The new open-plan kitchen/ dining/ living space has transformed the way our clients us their home and the spaces are flooded with natural light and views into the garden. 

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This contemporary, new build property is a low carbon family home that includes sustainable components such ICF wall construction, an air source heat pump, photovoltaic roof panels, an electric car charging port and a Mechanical Ventilation & Heat recovery unit.

St Albans Architects / Hertfordshire Architects / Residential Architects


Derwent Road construction site progress


Site work progressing well on one of our Harpenden projects.

Harpenden Road new build house St Albans


Planning Approval received for this 3500 Sq. ft new build, low energy home in St Albans.

Midway St Albans New house contemporary


Planning approval has been achieved for this low energy, new build residential property in St Albans.

Zinc extension Wilstone Tring Contemporary


Construction work is nearing completion on this Tring extension project that is clad in a black diamond zinc panel!

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Construction work is nearing completion on our Kimpton extension project that is clad in a vertical Western Cedar sat on a linear brick plinth.


'We worked with Seth to design our forever family home. We had a clear vision of what we wanted from the space internally, but wanted an architect with design flair to really give it the 'wow' factor and bring our vision to life, whilst getting it through the planning process. Seth came up with a few options, and we liaised closely to agree on our final design, which we love! Seth then managed everything closely with the planning office to submit our application and make a few requested amends so that our planning permission was granted approval first time round. Thanks so much Seth for helping our dream home become a reality.' 

 Mr & Mrs McNamee, St Albans

'We chose Seth to design our extension as his ideas for the space were extremely impressive. We had other Architects round and all they wanted to do was design a standard box. With Seth we had the confidence that we could get so much more. He explored various options for the design trying to give us unique details that would make our property standout. 
We managed to get planning approval with our first application (many designers had told us planning would be tricky due to the size of the extension) which is testament to the way it was designed & put forward to the planning department.
We have been very impressed with Seth & would definitely recommend him'.

Mr D. Keane, Harpenden

'Not only did Seth open us up to ideas we would never have thought of, he found the builders and managed every step. Seth signed off when things were complete for us to pay, and dealt with all the "issues" to save us getting lost in builder jargon. As a result, our project came in completely on budget and we love the finished building!

Seth is personable, knows his stuff and knows the people to work with, he comes highly recommended'. 

Mr & Mrs Reis, St Albans

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