Welcome to Lex McMillan Architects, an esteemed award-winning architectural design practice seamlessly merging innovation with traditional craftsmanship and expertise. With dedication woven into each and every project day, we craft bespoke architectural solutions that resonate with our discerning and meticulous clientele.

With offices in West London and Dorset, we operate with a compact core team while harnessing an expansive network of specialist engineers, designers, and consultants. We are proud to be able to offer a full range of architectural design services throughout Dorset, Wiltshire, Hampshire, London and outlying Counties.

At LMA, we have a 97% success rate in securing planning consent for both existing and new build projects and this stands as a testament to our unwavering commitment.

We approach each challenge as a blank canvas, blending innovation with experience to deliver spaces that transcend expectations.

We offer architectural design services for Home renovations, Listed Buildings, Countryside Houses, Commercial Retail Ventures, and Luxury Hospitality Design. From the meticulous preservation of listed buildings to the creation of breathtaking country-side residences, our expertise spans the spectrum.

Central to our ethos is the belief that architecture is not just about structures, but about crafting experiences. We orchestrate spaces that seamlessly merge aesthetics with functionality, shaping environments that resonate with the pulse of life.

Our commitment to excellence extends beyond aesthetics; it is also ingrained in our commitment to sustainable design practices. As we strive for a greener tomorrow, we understand that many clients feel an obligation and responsibility to minimise the impact of their properties on the environment for future generations, and we are delighted to assist in this. We will work with you to integrate the latest environmental technologies within our projects, often to Passivhaus standards to reduce both emissions and reduce future running costs.

The partnership with Lex McMillan Architects and architectural design is a journey, one that involves your aspirations and our expertise to create something extraordinary. We invite you to partnership with Lex McMillan Architects and explore the possibilities, to entrust us with your vision.

Your dream projects deserve nothing less than the innovative design practices, meticulous expertise, and passion that define us.

At LMA we are particularly careful with our client’s money and will tailor any scheme from the outset to fit the proposed budget. We then cross check at all stages of the design process that we can keep to this and avoid cost over runs.

So if you are just at the outset of a project, or simply want to discuss and explore your properties potential, please contact us to discuss your ideas. Our doors are always open and we offer a free initial consultation and would be delighted to hear all about your plans.


Our Design and Construction Partnerships:

McMillan & Holder Stonemasons

Charlotte Rowe Garden Design Ltd

Cooper Associates Ltd. structural engineering

Polbath Constructions Ltd

Rupert Lloyd Surveying

Carpentry Division Bespoke Joinery

Shean and Hare Contractors



Lex McMillan Architectural Design

Lex Mcmillan


Lex completed his diploma in Architecture at the University of Dundee in 1997. Following a year in practice working abroad in New Delhi, he returned to complete his studies at Oxford Brookes University and registered as an Architect in the UK in 2002.

He worked in several notable London based practices including Paul Davis & Partners where he ran large residential projects as part of the redevelopment of Sloane Square. He set up Lex McMillan Architects Ltd. in 2008 working primarily in West London.

A four year period of working and living in Helsinki resulted in an appreciation of the gentle, considered architecture of Finland with a particular interest in their sustainable approach to construction. On returning to London, LMA have sought to incorporate much of this within their design work.

Lex continues to lead the team sharing his time between London and North Dorset.

Lex McMillian
Lex McMillian

Please don’t hesitate to get in touch to discuss your next project