London & the Home Counties

High-End Residential Construction
in London & the Home Counties.

ARM Group is a construction company working across London and the Home Counties. High-end residential build, specialist carpentry, and Passivhaus construction — through three focused divisions, and one consistent standard.

Our Divisions About ARM Group
Harrow · London · Home Counties Est. 2025
MCIOB — Chartered Member
Passivhaus Certified
CIOB Chartered Building Company
London & Home Counties

About ARM Group

ARM Group is the parent company for three specialist construction divisions. Our leadership brings hands-on experience as carpenters and site managers — including work on listed buildings and traditional oak-framed structures — combined with Chartered Membership of the CIOB and Passivhaus certification, a combination that is rare at contractor level and which shapes how every project is approached.

We work on high-end residential projects in London and the Home Counties, typically for private homeowners, property developers, and in direct collaboration with architects and interior designers. We are not a large company, and we do not pretend to be. We take on the work we are equipped to do well, and we do it properly.

ARM Group Ltd
MCIOB · Passivhaus Certified

Three divisions.
One standard.

01
ARM Building
Contractors
Principal Contractor
High-end residential construction across London and the Home Counties. We act as principal contractor on significant projects — new builds, extensions, whole-house renovations, and conversions — working in close collaboration with architects, designers, and private clients. This includes particular experience with listed buildings and historic refurbishment, from sympathetic repair of existing oak frame structures through to the design and construction of new oak frame additions.
02
ARM
Carpentry
Specialist Trade
Specialist first and second fix carpentry for high-specification residential projects. Bespoke joinery, site carpentry, and finish work carried out to the standard that high-end projects demand — including the repair of existing oak frame structures and the fabrication of new oak frame work on listed and historic properties. Available independently or as the trade backbone of an ARM Building Contractors project.
03
Build
Passiv
Passivhaus Specialist
Passivhaus-standard construction and consultancy for clients serious about building performance. Led by a certified Passivhaus professional with hands-on experience of PHPP modelling, airtightness, MVHR, and timber frame construction. This is not a marketing term — it is what we are qualified to deliver.

Clear at every stage.
No surprises.

01
Craft First
We are tradespeople before we are anything else. The standard of work on site — every measurement, every joint, every finish — is where our reputation lives or dies.
02
Honest Communication
We tell clients what we think, not what they want to hear. On programme, on cost, on whether something will work. That directness protects everyone.
03
Earned Credentials
MCIOB, Passivhaus certification, CIOB Chartered Building Company. We hold these because we sat the exams and did the work — not because they look good on a website.
04
Collaborative By Nature
The best results come from being brought in early. We work well with architects and designers because we respect the design process and understand what it takes to build it.
05
Built to Last
We are building a company for the long term. That means doing right by clients, by subcontractors, and by the buildings we put our name to. Every time.

We work best when
brought in early.

Whether you are an architect with a demanding residential brief, a designer whose client won't compromise on finish, or a developer who needs a contractor they can trust — we would like to hear from you.

We understand drawings. We understand specification. And we understand that the relationship between contractor and design team either makes a project or breaks it. We take that seriously.

01
Pre-Construction Involvement
We are happy to engage early — reviewing drawings, flagging buildability issues, providing indicative costs — before a contract is in place. That conversation costs nothing and usually saves time later.
02
Design-Led Delivery
We build what was designed. If something changes on site, we talk to the design team first. The architect's intent is respected throughout.
03
Passivhaus Capability
If your project has a sustainability brief or a Passivhaus target, we are one of very few contractors in this area who can actually deliver it — not just talk about it.

Currently on site
across London & the Home Counties.

Discuss Your Project
ARM Group Ltd
Timber Frame New Build
London & Home Counties
ARM Group Ltd
Timber Frame New Build
London & Home Counties
ARM Group Ltd
Timber Frame New Build
London & Home Counties

A selection of recent work. Further project photography and case studies will be added as they become available — we are happy to discuss our current and recent work directly.

Working on
a project?

We would like to hear about it. Tell us what you are working on — the size, location, and where you are in the process. We will respond within 24 hours.

Based Harrow, London
Area London & Home Counties (50-mile radius)
Email info@armgroupltd.co.uk
Response Within 24 hours