Jonathan Cerowski

Jonathan Cerowski

Jonathan Cerowski

Associate | Architect

– BA(Hons) Architecture
– MArch Architecture
– PG Dip Management, Practice & Law
– Chartered Member of the RIBA
– RIBA Specialist Conservation Architect (SCA)
– Accredited with the Register of Architects Accredited in Building Conservation (AABC)
– Approved Architect for the CofE Diocese of Chichester, Portsmouth, Rochester, Winchester and London.
– Member of Chichester Diocesan Advisory Committee.
– Associate Member of the Ecclesiastical Architects and Surveyors Association (EASA)
– Specialist Advisor to the National Trust on Conservation Architecture.

Jonathan is a Chartered RIBA Architect, specialising in works in a heritage or conservation setting.

Prior to joining Cowan Architects, he studied at the University of Kent in Canterbury, and trained under Conservation Specialists Ptolemy Dean in London and Nick Cox in Oxfordshire. Most recently he worked for Donald Insall Associates, where he gained his conservation accreditations and led successful projects nationally and internationally. National projects included works at Carlisle Castle, Belmont House, the Houses of Parliament, Drayton Manor, Bart’s Hospital, Carlton House Terrace, Wakehurst Place, the Bloomsbury and Kensington Hotels. Internationally he led projects in Trinidad and France, including work for the Commonwealth War Grave Commission and the Government of Trinidad and Tobago.


Jonathan’s focus is on conservation and new design in historically significant settings, of which he has a wide range of experience. He has worked on buildings ranging in scale and stature, from country mansions and nationally recognisable public buildings, to modest private houses.

Jonathan is well versed in traditional and contemporary design and uses his design skills to work with clients to achieve sensitive solutions to each project’s individual circumstances. His approach in every instance begins with an appraisal of the existing building and continues with the development of proposals which are appropriate to the existing building, whilst improving the usability of it for its occupants. He is experienced in consulting with statutory consultees and encourages engaging in consultation at an early stage to ensure the acceptability of proposals are explored at an early stage, and financial risk to the client is minimised.

Previous projects include works to Kedleston Hall, Drayton Manor, Blenheim Palace, Garsington Manor, Shanks House, West Norwood Cemetery, Westminster Abbey and the Cathedrals of Wells and Winchester. Recent noteworthy projects include internal repairs and new works to Emmanuel Church in West Hampstead, which has been featured on the cover of the Church Building & Heritage Review and was highly commended in the National Churches Trust President’s Award.  Jonathan is the Inspecting Architect for several churches, ranging from nationally significant Grade I listed buildings, to unlisted 20th Century modernist structures.

He was also recently responsible for the repair works to Bart’s Hospital in London, working with Steven Holl Architects to deliver a new Maggie’s Centre built against the Grade I listed North Wing, designed by the preeminent Georgian Architect, James Gibbs.

Jonathan has previously completed works at both National Trust and English Heritage properties.  Currently he acts as a Specialist Advisor to the National Trust.

Beyond project work, Jonathan is keen to improve public understanding of the nation’s old buildings and what makes them special, and to this end he sits on the Society for the Protection of Ancient Buildings (SPAB) Sussex Committee, which organises public events and visits to buildings which are otherwise difficult to access. He has authored articles for national journals and has acted as an RIBA Student Mentor for University College London, and as a visiting critic at the Universities of Kent and Brighton.