The Extension House

54 St. James St, Liverpool, L1 0AB Directions

   Open today 08:30 - 20:00

Why Choose Us?

Expert Advice
Surrounding Areas
Good Value

Business overview

We provide high quality and affordable architectural services for domestic clients in the Liverpool and Merseyside region. Sefton, Knowsley, Halton, Wirral, West Lancs.

High quality architectural services to domestic and small commercial clients.

We design:

- Single Storey Extensions

- Double Storey Side Extensions

- Garage Conversions

- Outbuildings and Garden Rooms

- Internal alterations and fit-out works

- Fire Upgrade works

Why Us?

- All plans are drawn accurately in CAD and specified in accordance with building regulations

requirements ensuring fire safety.

- Friendly, experienced and highly qualified.

- Accurate planning and building regulations guidance.

- We can offer reliable and reputable builder and contractor recommendations.

- Fast Turnaround.


Single Story Rear Extension Design
Image 2 of The Extension House

Products & Services

Architecture Design

Draughting Services

House Extensions


Listed Buildings


Residential Architects

Sustainable Design

Building Design

Building Conversions

Building Consultants

Building Plans

Building Refurbishments

Building Space Planning

Planning Applications

Commercial Architects

Building Regulations Expert

Chartered Surveyor

Chartered Association of Building Engineers Member

House Extension Design

Structural Alterations

CAD Modelling - Computer Aided Design



  • Chartered Association of Building Engineers


Excellent experience

I had a brilliant experience with the extension house. Kevin created plans for a two storey extension for us in Maghull, nothing was too much for Kevin and the price was very good! Better than other quotes I had and a really friendly service. The plans were just what we asked for and they were delivered bang on time. Thank you!
Paul and Justine.
Cancel Update
1000 characters limit