Building exceptional spaces across the UK
From concept to completion, Alsec Building Solutions delivers high-quality renovations, extensions and full builds for domestic and commercial clients — all managed under one roof.
Extensions & Lofts
Expand your living space with beautifully designed single or double storey extensions, loft conversions, and garage transformations.
Full Renovations
Complete home and commercial renovations from structural work through to interior finishes, managed seamlessly by our project team.
Kitchen & Bathroom
Bespoke kitchen and bathroom fitting by our specialist teams, including plumbing, tiling, electrics and everything in between.
Design Services
Our in-house interior designers and architects create spaces that work — from initial concepts and 3D visualisations to material selection.
Structural Works
Groundwork, foundations, steel beams, brickwork and all structural elements delivered by our qualified team of builders and engineers.
Plumbing & Gas
Licensed, Gas Safe registered plumbers and gas engineers for all domestic and commercial installations, repairs and servicing.
Every trade.
Alsec Building Solutions is a well-established UK building company delivering domestic and commercial projects nationwide. We specialise in renovations, extensions and complete design-to-build services.
What sets us apart is our fully in-house team. No subcontracting guesswork — every trade is covered by qualified professionals who work together daily.
Consultation
We visit your property to understand your vision, assess feasibility, and discuss budget. No obligation, no pressure.
Design
Our design team creates detailed plans and 3D visuals. We handle planning applications and building regulations.
Build
Your dedicated project manager coordinates all trades on site. Regular updates and transparent progress tracking throughout.
Handover
Final inspection, snagging, and a thorough walkthrough. We don't finish until you're completely satisfied.
Project Managers
End-to-end coordination
Interior Designers
Creative vision & planning
Plumbers
Licensed & approved
Gas Engineers
Gas Safe registered
Bricklayers
Structural & decorative
Kitchen Fitters
Bespoke installations
Groundworkers
Foundations & drainage
Plasterers
Finishing specialists
Decorators
The perfect finish
Alsec transformed our dated semi into a stunning open-plan home. The team handled everything — from digging the foundations for our rear extension to fitting the kitchen. Absolutely first class.
We used Alsec for a full commercial refit of our restaurant. They managed the project brilliantly, hitting every deadline and keeping disruption to a minimum. Highly recommend.
From the interior design concepts right through to the final coat of paint, the quality and communication was outstanding. Having every trade in one company made the whole process so smooth.