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David Parry

Founder of the practice and Chairman of the St Stephens Parish Council, David has an extensive local knowledge and background in planning and the local built environment. Previously a St Albans District Councillor and Chair of the Planning Committee he is also a member of their Agents Forum Advisory Panel. He is actively involved in community Neighbourhood Plan preparations and voluntary work in the youth sector. 

When not in the office (and occasionally when he is!) David is either campaigning on some local issue, in his role as a Parish Councillor, or more likely pursuing his long standing interest in youth work, planning wild and wonderful expeditions abroad for his Explorer Scout Unit, or assessing local schools Duke of Edinburgh expeditions.


Heather McNeill BSc(Hons) Dip Arch PG Dip ARB RIBA CEPH

Director and Architect Heather started working at A D Practice Ltd at the age of 16 as a CAD Assistant which prompted her to study her Part 1 Architecture at the University of Bath. After a period of time in practice in Suffolk, she went on to complete her Part 2 at the Centre for Alternative Technology in Machynlleth, North Wales and returned to to the practice in 2018. Heather completed her Part 3 studies at Kingston University and was accepted into the ARB and RIBA in 2021. As our Certified Passivhaus Designer, she specialises in sustainable and energy efficient design and has broad experience in the residential and conservation sectors.

When she is not in the office displaying a clear aversion to wearing shoes unless it is absolutely necessary, Heather can be found in the mountains as a qualified ski and snowboard instructor. She has also started a blog with the aims of increasing awareness of architecture and the role architects play in design as well as discussing sustainability. It can be found here.

ARB: 098095A

RIBA: 20005896


Nimmiya Mariam BArch(Hons) MArch

To support her passion for creating  designs that are sustainable and environmentally friendly, Architectural Designer Nimmiya moved from India to London to pursue her Masters in Sustainable Environmental Design at the Architectural Association. After her studies, Nimmiya has worked for practices in Cambridgeshire and London furthering her learning and experience in retrofitting existing buildings to improve energy performance.

In her spare time, Nimmiya enjoys travelling and experiencing new cultures and cuisines.  

The team is underpinned by fantastic support staff, without whom they would cease to function.