ADSP is a multi disciplinary practice of Chartered Surveyors based in Maidenhead at the centre  of the thriving Thames Valley.

Core skills include Chartered Surveying, Architectural Design, Planning Applications and Party Wall matters.


The office is managed by Philip Alexander who is a qualified Chartered Surveyor (FRICS) and Chartered Building Engineer (C B Eng FCABE). Philip qualified in 1979 and has run his own practice since 1978 .


ADSP works predominantly within the home counties of Berkshire, Buckinghamshire, Oxfordshire and greater and Central London. Work across the France and Spain for longstanding Clients has also been undertaken and the practice is also familiar in particular with projects in France including French Property law and Planning law.


The main emphasis of our work is Building Design involving all aspects from initial feasibility through to Planning Application, Working Drawings, Internal design, Tendering, Work Mobilisation and Project Management through to completion.


We work across all fields including Residential Extension and New Build, Commercial Extension and Refurbishment.


Our Chartered Surveying practice can undertake Building Inspections on both Residential and Commercial Properties and they are also experienced Party Wall Surveyors and have a long experience of working for both building Owners and Adjoining Owners on a variety of projects.

Philip qualified in 1979 and has worked across a variety of disciplines during his career. He has run his own practice alongside other appointments since 1978 and has been running his own practice full time since 1997.

Phil Alexander

Niamh undertakes all the 3D work that the company produces for clients. She also acts as the company secratory and general office assistant.