Built on trades, run like a practice.
We grew from a small team of tradespeople into a complete building, mechanical, electrical and commercial maintenance company — without losing the habit of turning up, doing the job properly, and being reachable afterwards.
- Gas Safe registered
- Fully insured
- Supervised site management
- Vaillant & Worcester Bosch
- Water regs & RPZ testing
- 12-month guarantee
One team, so nothing gets lost between trades
Founded in London by tradespeople — and still run the same way.
The problem we kept seeing
Building work, mechanical services and ongoing maintenance were treated as separate jobs for separate companies — and clients were left coordinating between them.
How we built BSL differently
One team handles the building, the plumbing and heating, the electrics, and the maintenance that follows — so nothing gets lost in translation between trades.
Fifteen years on
The approach hasn't changed — we've just gotten better at it: more qualified people, wider services, and long-standing maintenance relationships with property managers, hotels and commercial clients.
Our mission & vision
Our Mission
To deliver complete building, mechanical and commercial maintenance services under one accountable team — so clients never have to chase multiple contractors to get a job done properly.
Our Vision
To be the single trusted point of contact for buildings across London — from the first extension, through every mechanical and electrical service, to the maintenance that keeps a property running for years after.
The specification we hold ourselves to
Workmanship
Qualified, fully insured tradespeople working under supervised site management, on every job regardless of size.
Communication
One point of contact from quote to completion, with clear timelines and no surprises along the way.
Standards
Gas Safe registered engineers, Vaillant and Worcester Bosch installation expertise, and water regulations & RPZ valve testing.
Guarantee
A 12-month workmanship guarantee on completed work, because we stand behind the job after we've left site.
Fully insured, Gas Safe registered, and on site when we say we'll be
Every project is supervised by a dedicated site lead, backed by a qualified professional team across building, mechanical and electrical trades. It's the reason clients keep coming back for the next project — and the maintenance contract after that.
Get your free quoteHave a project in mind?
Tell us what you're building or maintaining, and we'll get back to you with clear next steps — free of charge.