Would you like a free consultation & quotation for your extension?
What our clients say
"Had a great experience with Lion & Leinster on our extension. The team was professional, tidy and the finished space exceeded our expectations."
"Lion and Leinster built a beautiful extension for us. Highly professional, dedicated to the highest standards and kept disruption to a minimum."
"Our extension project involved removing an internal wall, adding new windows and creating a larger kitchen-living space. The Lion and Leinster team were excellent from start to finish."
Recent extension projects
High quality extensions built by master builders.
Magdalen Grove — Kitchen Extension
Single-storey rear extension with lantern roof and open-plan kitchen-living space.
Southsea Road — Rear Extension
Full-width rear extension with bi-fold doors opening onto the garden.
Our process
1
Free consultation
We visit, listen to your plans and survey the space — no charge, no pressure.
2
Clear fixed quotation
A detailed, itemised quote so you know exactly what you're paying for.
3
Build with master builders
One dedicated team, tidy site, weekly updates from start to finish.
4
Handover & guarantee
Final walkthrough, sign-off and workmanship guarantee on completion.
Why Lion & Leinster
- ✓High quality extensions built by master builders
- ✓Checkatrade Awards 2026 nominated with 10/10 reviews
- ✓TrustMark & Trading Standards approved
- ✓Fixed written quotations — no hidden extras
- ✓Local specialists in and around South West London
- ✓Fully insured with a workmanship guarantee
Takes under 30 seconds — no obligation.