0208 123 4567 info@primeloft.co.uk ★★★★★ 5.0 · Trustpilot

Loft Conversions from —
Pre-Existing Plans

Already Have Plans?

Loft Conversion from Pre-Existing Plans

Have you already commissioned architectural drawings for a loft conversion — perhaps from a previous contractor or architect — and want to use those plans for your build? Prime Loft can work from pre-existing approved drawings, carrying out the construction phase with our own specialist in-house team and covering the project with our 10-year structural warranty.

What We Need to Review

Assessing Your Existing Plans

Before we can commit to a fixed price against pre-existing plans, our structural engineers and project manager review the drawings to confirm:

The design is structurally sound and all required calculations are present
Building Regulations approval is in place (or the drawings are ready for submission)
Planning consent is in place where required
The specification is complete and clearly documented
There are no outstanding conditions or queries from the local authority

If any of these elements are missing or incomplete, we can advise on what is needed and, where appropriate, complete the missing professional work as part of our service.

Our Commitment

The Same Fixed Price & Warranty Whatever Your Plans

Whether you bring your own plans or commission new drawings through our in-house architects, every Prime Loft conversion is delivered at a fixed price with a 10-year structural warranty. Your dedicated project manager oversees the build from start to handover.

Free Survey

Book Your Free Survey & Fixed-Price Quote

No obligation. No pressure. A clear, fixed price for your conversion.

Book Free Survey or call 0208 123 4567
Our Guarantees
Fixed price — guaranteed
10-year structural warranty
Dedicated project manager
In-house architects & engineers
500+ London conversions completed
5.0 Trustpilot rating
Ready to Start?

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No obligation. No pressure. A clear, honest picture of what’s possible in your home and exactly what it will cost.

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