About Us

CBS Architectural Services is a husband and wife partnership run by Calvin and Marian Birkett-Stubbs. Calvin deals with the technical side and Marian deals with the admin, marketing and ICT.

Calvin Birkett-Stubbs, MCIAT, CBS Architectural Services

Calvin Birkett-Stubbs, MCIAT

Calvin has professional accreditation as a Chartered Architectural Technologist (MCIAT) and CBS Architectural Services is on the Chartered Institute of Architectural Technologists’ (CIAT) practice register. 

CBS Architectural Services is also a registered partner in the Local Authority Building Control (LABC) scheme and  a Smarter Planning Champion, further confirming CBS Architectural Services commitment to follow best-practice guidelines for the submission of planning applications, which saves time, money and carbon for clients and helps local authorities to process applications as quickly and efficiently as possible.


Calvin has over 30 years experience of building design and construction management. He has worked for Norwich City Council, Norfolk County Council, NPS Property Consultants Ltd and a number of private architectural practices in Norwich.

During the course of his employment Calvin has undertaken numerous projects throughout Norfolk, Suffolk and north Essex in a wide variety of settings, including office premises, private housing developments, public buildings, schools, crematoria and industrial and waste recycling buildings.

Marian Birkett-Stubbs, BA (Hons), CBS Architectural Services

Marian Birkett-Stubbs, BA (Hons)

Calvin also has extensive practical building experience, having undertaken numerous building projects at homes he and his family have lived in over the years. These projects have included several house extensions, garages, including one with a ‘living’ (sedum-covered) roof, a wrap-around decked terrace and swimming pool.

These hands-on building projects add an important extra dimension to Calvin’s technical knowledge, giving him greater insight into the practical application of building design than if he had been entirely desk-bound. 

Marian’s career background has primarily focussed upon strategic and operational management within the Voluntary and Community Sector. She has a BA Hons degree in Social Policy and accreditation in Business Studies and Adult Learning.

You can read about how CBS Architectural Services can assist with your building design project under Our Services

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