Independent builder & joiner · led by Patrick O’Malley · St Albans & Harpenden
A Hertfordshire building firm named after timber, run by the man who prices your job.
Lignum Build Ltd is Patrick O'Malley's company — a St Albans and Harpenden builder doing new build, refurbishment and restoration, with bespoke joinery and carpentry at the centre of it. On Companies House it's company 10691532, incorporated on 27 March 2017 and active. Small, independent, and answerable to you rather than to a head office.
On the public record
- Company
- Lignum Build Ltd
- Company number
- 10691532
- Incorporated
- 27 March 2017
- Status
- Active
- Director
- Patrick O'Malley
We publish the company number rather than a founding year, because the company number is something you can check.

One director, and it matters
Patrick O'Malley is the sole director of Lignum Build Ltd, and every client who has written about the firm writes about him personally — "Pat and his team", "I contacted Patrick at Lignum for a quote", "big thanks to Pat and the team". That's not a marketing line, it's what happens when the person who prices the work is the person on site while it's being done.
Why "Lignum"
Lignum is Latin for wood or timber, and the firm's mark is a tree drawn in a single green line. It's a fair description of where the craft sits: bespoke joinery and carpentry — staircases, wardrobes, panelling, cabinetry, doors and the profiles that match an old house — is the work Lignum Build specialises in, with a team the firm describes as highly skilled professional craftsmen.
Every trade under one company
Bricklaying, plastering, plumbing, tiling and electrical work are carried out by Lignum Build's own experienced team. That's the practical reason projects here don't stall: the programme belongs to one firm, so the plasterer isn't waiting on somebody else's electrician and you aren't the one making the phone calls.
A Hertfordshire firm, not a London one
The work is in and around St Albans and Harpenden — the reconfiguration job in Harpenden, the loft in Markyate, the bathroom in Harpenden again. Local means the van is ten minutes away when a decision needs making on site, and that the firm's reputation is the one thing it can't afford to spend.
What clients keep saying
Three testimonials, three recurring themes.
Courteous, knowledgeable, efficient
Joy B in Harpenden used exactly those three words about Pat and his team after a reconfiguration involving a good number of steel beams and a relocated electrical supply. Complicated work, described calmly — which is usually the sign of a job that was properly planned.
On time, and on budget
Two separate clients say it unprompted: a Markyate loft conversion "completed on time", and a Harpenden bathroom "on time and budget". A programme you can plan your life around is worth more than the cheapest quote in the pile.
Questions answered with patience
"All my questions answered with patience and expertise" — Amanda, Harpenden. Most of a building project is the client not knowing what happens next; explaining it properly is part of the job, not an interruption to it.
In a client's words
“Big thanks to Pat and the team at Lignum Build for transforming my bathroom. Quality work, on time and budget and great customer service (all my questions answered with patience and expertise!). They have done a brilliant job.”
Amanda, Harpenden — Bathroom transformation