Inspired by Ambition.
Built to Perfection.
“Investing in our people. Delivering above expectations for every client.”
Premium house extensions, renovations and loft conversions across all of London. One team managing design, approvals, build and handover.
Our Construction Services
From design to handover, we manage every aspect of your construction project with precision and care.
House Extensions
Rear, side, wraparound and double-storey extensions that add space, value and functionality to your London home.
Learn moreHome Renovations
Full house refurbishments and modernisations that transform existing properties into stunning, contemporary living spaces.
Learn moreLoft Conversions
Dormer, mansard, hip-to-gable and velux conversions that unlock your home's hidden potential with minimal disruption.
Learn moreBasement Conversions
Expert basement excavation, underpinning and tanking to create luxurious underground living spaces in your London property.
Learn moreGroundworks & Drainage
Professional foundations, drainage systems, and site preparation ensuring rock-solid structural integrity for every build.
Learn moreHard Landscaping
Beautiful driveways, patios, retaining walls and outdoor spaces that complete your property's transformation.
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Featured Projects
Explore our latest house extensions, renovations and loft conversions across London.
Full Renovation & Extension
Archway, North London
Victorian Renovation & Extension
Bow, East London
Extensions & Renovation
Golders Green, North London
Refurbishment & Loft Conversion
Stratford, East London
Hawthorn Cottage Extensions & Renovation
Limehouse, East London
Extensions & Renovation
Cockfosters, North London
Our Proven Process
From initial consultation to handover, we make your construction journey seamless and stress-free.
Consultation
We visit your property, understand your vision, assess the site and discuss your budget and timeline. Free, no-obligation.
Design & Approvals
Our in-house architects create detailed plans. We handle all planning applications and building regulation submissions.
Build
Our skilled team brings your project to life with quality materials, expert craftsmanship and clear communication throughout.
Handover
Final inspection, snagging resolution, and keys in your hand. Your transformed home, ready to enjoy.
Every Alstruct project is documented with Thanex — time-stamped site photos, automatically organised by type and location, so you receive a complete, audit-ready record of your build.
What Our Clients Say
Our reviews are published on Google, where every rating comes directly from a verified client — we don't edit, filter, or curate anything.
The most honest way to assess our work is to read what our clients have actually said — in their own words, on an independent platform.
Read Our Google ReviewsAreas We Cover Across London
We provide house extensions, renovations and loft conversions across all London boroughs and surrounding areas.
North London
South London
East London
Don't see your area? We cover all of London and surrounding areas.
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