Your Local Experts in House Extensions
At LBH Building & Property Services, we design and deliver custom home extensions tailored to your lifestyle and property. We understand local planning regulations, property layouts, and building standards in Welwyn Garden City and nearby areas, including Hertford and St Albans.
From rear extensions and wraparounds to double-storey builds, our work combines functionality, value, and seamless design integration.
The Extension Process: Start to Finish
1. Site Survey & Consultation
Our local team will visit your home to understand your goals, assess feasibility, and provide expert advice. We consider property lines, natural light, and access to deliver the best plan for your space.
2. Planning & Permission
Navigating planning regulations can be daunting—we make it simple. We assist with drawings, planning applications, and building control approvals to ensure full compliance.
3. Materials & Design Guidance
You’ll receive expert help choosing materials that meet your style and budget. From bricks to bi-folds, every element is selected with purpose.
4. Project Management
Your dedicated site manager oversees the schedule, trades, and quality control. You’ll be kept updated every step of the way.
5. Final Inspection & Sign-Off
Once complete, we conduct a final walkthrough with you to ensure everything meets expectations. We only sign off when you're completely satisfied.
Local Experience. Quality Results.
LBH Building & Property Services is based in Welwyn Garden City and serves clients across:
- Hertford
- St Albans
- Stevenage
- Luton
- Harpenden
Our deep understanding of these local areas allows us to navigate specific planning requirements and adapt designs to suit local property types.
What Our Clients Say
“We hired LBH, led by Lewis Hammond, for a full house extension and refurbishment. It was a big project, and Lewis was honest, professional, and flexible throughout. He stuck to the agreed budget, discussed any extras in advance, and his invoices were always clear. He helped us with design choices, was always polite, and even supported us with maintenance jobs after the project was complete. We’re very happy with the result and would definitely work with him again. Highly recommended!” - Pablo M, ★★★★★
“LBH recently completed our 2-storey rear extension and loft conversion project. We are really pleased with the final outcome and found Lewis to be a reliable and trustworthy person to work with. With a project of this size there were always going to be unforeseen challenges but we were able to successfully navigate through these. I found LBH to be responsive to the needs of the customer and would have no hesitation in using their services again in the future.” - Peter S, ★★★★★ Google Review
FAQs: Home Extensions in Welwyn Garden City
About Extension Builders
It depends on the size and placement. We advise on whether permitted development applies or if formal permission is required.
Most single-storey extensions take 8–12 weeks. Larger or double-storey builds can take 12–16 weeks or more.
Yes. We provide guidance on structural design, finishes, and fixtures to suit your home and budget.
Absolutely. All work is backed by the HomePro Guarantee for peace of mind.
No—we cover Hertford, St Albans, Stevenage, Luton, and surrounding towns.
Ready to Extend Your Home?
Whether you're planning a large rear extension or converting unused space, we’re here to make it happen.
Contact LBH Building & Property Services today for your free consultation and quote.
We offer friendly, no-obligation advice and transparent pricing for all types of home extensions. You can reach us by phone, email, or by using the quick contact form on our website. Our team is responsive, helpful, and ready to answer any questions you may have.
Call us today on
07737 397031 or
fill out our online form
