London's Premier
Loft Conversion Specialists

Prime Loft has been transforming London homes since 2009. We're not a generalist builder — every single project we take on is a loft conversion or home extension. It's all we do, and we do it exceptionally well.

Our Story

Built on Craft,
Driven by Excellence

Prime Loft was founded with a single, clear purpose: to deliver loft conversions in London to a standard the industry rarely achieves. Too many homeowners were being let down by contractors who overpromised, underdelivered, and disappeared when problems arose.

We changed that model. As a specialist-only contractor — part of the Prime Construction Group — every project benefits from our focused expertise, our in-house architectural team, and our absolute commitment to the fixed price we quote on day one.

Today, Prime Loft has completed over 500 loft conversions across London and holds a 5-star Trustpilot rating built entirely on genuine client reviews.

Our Values

What Makes Us Different

Specialist Focus

We only do loft conversions and extensions. This singular focus means our teams, processes and knowledge are sharper than any generalist builder can match.

Total Transparency

One fixed price. No variations. No surprises. Everything that is needed to complete your conversion is included in the quote we give you from day one.

In-House Expertise

Architects, structural engineers, project managers and skilled tradespeople — all under one roof, all accountable to you, all working as a single cohesive team.

On-Time Delivery

We set realistic timelines and we keep to them. Our project management system tracks every stage of your build so you always know exactly where things stand.

5-Star Quality

Every finish is inspected before handover. We don't consider a project complete until our quality standards — and more importantly, your standards — are fully met.

10-Year Warranty

A decade of structural warranty on every conversion we complete. It's our commitment that the work we do is built to last — and we stand behind it fully.

Part of Something Bigger

The Prime Construction Group

Prime Loft is the loft conversion specialist arm of the Prime Construction Group — a family of premium property services companies operating across London and the South East.

Prime Loft

Specialist loft conversions and roof extensions across London. Our flagship division.

Prime Extensions

Rear, side and wrap-around extensions for London homes. Same team, same standards.

Prime Renovations

Full property refurbishments and renovations for residential clients across London.

Ready to Start?

Get Your Free Survey & Fixed-Price Quote Today

No obligation. No pressure. Just a clear, honest picture of what's possible in your home and exactly what it will cost — guaranteed.

Book a Free Survey → ☎ 0208 123 4567

London's PremierLoft Conversion Specialists

Built on Craft,Driven by Excellence