Chartered Architects &
Structural Engineers in London

Your project is handled by chartered structural engineers, qualified architectural designers and experienced technicians. Our engineers are registered members of the Institution of Civil Engineers, and every stage involves the right specialist for the task.

It depends on the scope of your project. Many rear extensions and loft conversions fall under permitted development, but alterations to the main structure often require formal permission. We assess your project and advise on the best route — and handle the full application if needed.

Yes. Many home improvement projects qualify under permitted development rights, meaning no formal planning application is required. We assess whether your project qualifies and prepare the necessary documentation, including a Lawful Development Certificate if needed.

Yes. We produce full building regulations packages including structural calculations, all prepared in-house. These drawings are submitted to Building Control and issued to your builder for accurate quoting.

Absolutely. All structural calculations and designs are prepared by our chartered engineers who are registered members of the Institution of Civil Engineers. We carry full professional indemnity insurance, so you can proceed with complete confidence.

If your project involves work on or near a shared boundary, the Party Wall Act 1996 may apply. We assess whether notification is required and coordinate with a party wall surveyor when needed, ensuring the process doesn't delay your project.

A typical residential project takes around 4 weeks from consultation to planning submission. Council decisions usually take 8 weeks for householder applications. Technical drawings for building regulations follow in 5–7 working days after approval. We can fast-track urgent projects.

We will not pretend every application succeeds. No practice can, and any firm promising otherwise is overselling. What we do commit to is that you never pay our full fee twice for the same project.

If your application is refused, we review the decision notice, redesign the scheme to address the officer’s specific reasons, and resubmit the same scope of works for half our original fee. That figure is agreed with you in writing before any work begins.

The council’s own application fee is set by government and is payable again on any resubmission. That one sits outside everybody’s control, including ours.

Yes. We regularly assist clients with refused applications. We review the council's reasons for refusal, redesign the scheme to address their concerns, and resubmit or lodge a formal appeal where appropriate.

Yes. We cover all 32 London boroughs from our offices in Park Royal and Teddington. We also work across Hertfordshire, Surrey, Essex, Kent and other Home Counties.

Yes. Salstan is a full-service practice. We manage projects from initial concept through to completed construction — architecture, structural engineering and building works, all under one roof.