Fixed-price quotes
Start your extension project with a free quote today
20 years of high quality home extensions in Hertfordshire
- ✅ TrustMark Registered
- 🏗️ Federation of Master Builders Approved
- ⭐ 5-Star Rated on Bark.com
- 🛠️ 100+ Years of Combined Experience
- 🤝 10 year guarantee on all structural work
Harrow
St. Albans
Enfield
North London
North West London
Southall
West London
Watford
Harrow
St. Albans
Enfield
North London
North West London
Southall
West London
Watford
How It Works
Getting your perfect extension is as easy as 1, 2, 3
Get your free quote
Site visit & expert advice
We handle everything
From planning to construction, our expert team takes care of it all.
why choose us
Other builders let you down. We get it right first time.
What you get with AEA1
Planning & permissions support
Guidance through approvals if needed
Transparent pricing
No hidden costs, clear quotes
On-time project completion
Sticking to agreed schedules
High-quality craftsmanship
100+ years of combined experience
Complete service
One team, start to finish, design, planning, build and finishing touches.
Other Builders
You're left to figure it out yourself
Hidden fees and unclear costs
Delays and missed deadlines
Inconsistent quality and poor communication
Often require multiple contractors
get started
Start your project with a team you can trust
How It Works
Getting your perfect floor is as easy as 1, 2, 3
Groundworks & building
Reliable foundations and strong structures for a durable, long-lasting extension.
Carpentry & roofing
Plumbing & ventilation
Electrics
Plastering & decorating
Kitchen fitting
Experience you can trust
A construction company that puts quality first
Experience that speaks
Quality work, proven by happy clients
Was a bit hesitant since I’ve had bast experiences in the past but from the beginning I felt the genuineness & professionalism from AEA. They gave me a very reasonable quote & completed the job within the said time! Finally found honest workers I can always go back to.
Julia
AEA carried out a remarkable job, extremely professional & timely. All the workers were respectful and the final product really did exceed my expectations. Would absolutely recommend to anyone looking to upgrade their house!
David
From the minute they got assigned to me, they gave me constant updates I had during their work progress, working with AEA has been the one of the best experiences I’ve had. Great customer service and communication skills and very clear on what will happen at each stage. I will definitely recommend my family and friends to work them and I’d definitely be in touch with them in the future.