Expert engineering with a personal touch
With over 20 years in the trade, All lN Building Services Ltd knows that when your building needs attention, you want clarity and results, fast. We combine technical know-how with a family-run approach, covering everything from emergency repairs to planned maintenance. We’ve built our reputation by delivering honest advice, transparent pricing, and long-term fixes, never just a quick patch. From South London and across the M25, we take pride in getting the job done right so you can get back to what matters.
Our qualified engineers hold NVQ Level 3 in Plumbing, NVQ Level 2 in Plumbing, and G3 Unvented Cylinders certifications, demonstrating a high standard of technical expertise across plumbing and heating systems. We are also affiliated with the Chartered Institute of Plumbing and Heating Engineering, WaterSafe Thames Approved, and WRAS (Water Regulations Advisory Scheme), giving customers confidence that all work is carried out safely, professionally, and in line with industry regulations.
What we offer
Why choose us for your building engineering?
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Thames Water Approved, CIPHE registered, and fully accredited engineers
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No hidden charges or call-out fees, ever
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Fast, same-day emergency attendance when you need us
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Honest recommendations, no unnecessary upselling
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We leave your property clean and tidy every time
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WaterSafe G3 Qualified (for unvented hot water systems)
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HIU Qualified (Heat Interface Units)
No call-out fees ever
Covering residential and commercial sites
Transparent, upfront pricing
Building trust through accreditation and experience
Our engineers each bring hands-on expertise and a commitment to high standards, whether we’re working in period homes or large commercial sites. All lN Building Services Ltd focus on diagnostics before repairs, so you get a solution that lasts. From burst pipes and heating failures to plant room installs and compliance checks, we’ve seen it all, and we’re ready for the next challenge. By working weekends and evenings, we make sure your property is protected, no matter when problems arise. Our expertise also covers boiler installations, central heating installations, plant room installations, leak detection, pipe freezing, plumbing services, and pump replacements, delivering reliable solutions for both residential and commercial properties.
Meet the team
Andre – founder & lead engineer
With extensive experience across plumbing, heating, and specialist commercial systems, Andre leads projects with a hands-on approach focused on quality and efficiency. He remains actively involved on-site to ensure every job is completed safely and to the highest standards, helping build the company’s trusted reputation across South London and the M25.
Louis – engineer
Louis brings valuable expertise in reactive maintenance, plumbing repairs, and heating systems, delivering fast, effective solutions for residential and commercial clients. Known for his customer-focused approach, he combines practical knowledge with clear communication to ensure every customer receives reliable service and professional support from start to finish.
Frequently Asked Questions
​Looking for honest, accredited engineers?
Call our building service engineers today for expert advice and pricing.