Detailed information for homeowners in London and the UK on what to expect after engaging with an architect, to help clients stay ahead of the process.


Topics include architectural design, riba plan of work, planning guidance, costs and fees, building control, party wall, construction process, materiality, ethics and sustainability.


All posts are written by Armstrong Campbell Architects using our experience working as architects in London with over 25 years combined experience.


Detailed information for homeowners in London and the UK on what to expect after engaging with an architect, to help clients stay ahead of the process.


Topics include architectural design, riba plan of work, planning guidance, costs and fees, building control, party wall, construction process, materiality, ethics and sustainability.


All posts are written by Armstrong Campbell Architects using our experience working as architects in London with over 25 years combined experience.

armstrong campbell architects house in leytonstone london extension in blockwork and exposed timber ceiling joists

Residential House Extension Cost in London, 2026 Budget Guide

3 January 2026
A guide to all construction, professional and statutory costs of residential extensions, including our bespoke Cost Benchmarking Strategy that allows for more accurate estimating.
Armstrong Campbell Architects exposed chimney brickwork painted House in Leytonstone, East London.

Guide to Building Control, Party Wall Agreements and Principle Designer Role

4 December 2025
A guide to regulation aspects of building an extension in London or UK - covering building control, party wall agreements and principle designer role under CDM.
Planning drawings: section and elevation of a house in Leytonstone, London. Armstrong Campbell.

Guide to Planning Permission & Permitted Development in London

3 December 2025
Everything London homeowners need to know about planning permission and permitted development rights for home extensions, loft conversions and new build houses.
London residential architect in Leytonstone design service. Working with architects.

Do I Need an Architect for A London Extension or Loft Conversion?

30 November 2025
Considering a London home extension, loft conversion or renovation? Armstrong Campbell Architects in Leytonstone explains why hiring an architect adds value.