
Harley Street Projects
For over 30 years, A21architects has transformed Grade II listed Georgian properties across Harley Street and surrounding areas. We specialise in seamlessly adapting these beautifully proportioned historic buildings into highly technical clinical facilities, dental practices, and luxury living spaces. Our goal is to realise a contemporary aesthetic that is precisely tailored to each client. Balancing our deep appreciation for the historic context while not compromising the ambitions of a modern medical environment.



137 Harley Street
139 Harley Street
147 Harley Street
92 Harley Street
94 Harley Street
140 Harley Street
129 Harley Street
8 Devonshire Place
9 Devonshire Place
Upgrading these Georgian terraced houses for contemporary use requires meticulous, highly pragmatic interventions.
A21architects are adept at incorporating upgrades so the results are imperceptible in the finished works. These interventions include structural strengthening to safely accommodate higher footfall or heavy diagnostic equipment . Upgrading fire safety, discreetly routeing new services including HVAC, electrical, and IT.
A21 has implemented a number of spatial solutions that can transform the use and value of these properties such as, linking of adjacent properties, complex basement excavations, custom lifts for people and goods accessibility.
Securing permission usually demands dual consent from Westminster City Council and the freeholder, The Howard de Walden Estate. Collaborating with our trusted, long-standing team of specialist consultants, we deliver fully coordinated designs that secure the consents required, maximise spatial opportunities, adhere to your schedule and budget.

The comprehensive upfront detailing A21architects is able to deliver is especially critical when medical licensing with the Care Quality Commission (CQC) . Because the CQC mandates a fully fitted, 'inspection-ready' facility prior to approval, medical projects carry inherent financial and temporal risks. Using our experience to intelligently embed Health Building Notes (HBN) and Health Technical Memoranda (HTM) standards from the very outset, A21architects works with you to eliminate uncertainty. Our rigorous and clear design information directly supports early production of your mandatory compliance documentation, de-risking the build phase so your new facility can open on schedule.


