CasaFrame

Affordable

We provide affordable options that fit your budget while meeting your customised needs

High Quality

We partner with the best brands in the industry to ensure excellence and reliability

Fast Build

From order to completion, we offer a quick 3-5 week lead time and a swift 1-2 day installation

Modern Building Systems. Endless Possibilities.

Modern building systems for homes, businesses and outdoor living.

Whether you need a garden office, annex home, commercial space, or a custom steel kit, CasaFrame provides tailored, durable, and cost-effective building solutions across the UK—from supply-only shells to fully installed turnkey projects.

Get a Free Quote Building Systems

What Are You Building?

Garden Buildings
Garden offices, studios, hobby rooms, entertainment spaces and home working environments designed for year-round use.
Fitness & Leisure
Home gyms, golf simulator rooms, wellness buildings and dedicated leisure spaces.
Annex Living
Guest accommodation, granny annexes and independent living spaces.
Commercial Buildings
Offices, healthcare facilities, classrooms and commercial buildings.
Site & Temporary Buildings
Site cabins, welfare units, sales offices and temporary accommodation.
Outdoor Living
Glassrooms, verandas, pergolas, louvred roofs and outdoor comfort solutions.

Every project starts with a purpose. Tell us what you want to build and we'll guide you to the most suitable building system.

OUR PRODUCT FAMILIES

Choose Your Building System

Not every project requires the same construction method. CasaFrame offers six product families, each designed for different applications, budgets and performance requirements.

CasaBox

Fast. Affordable. Insulated.

A modular insulated building system designed for garden rooms, offices, studios, gyms and cabins. Ideal for a cost-effective building with minimal site disruption.

Typical Budget £8,000 – £20,000+

Explore CasaBox →

CasaSteel

Architectural. Bespoke. Engineered.

A premium, design-led light steel frame system offering larger spans, higher ceilings and architectural freedom. Ideal for golf simulators, gyms and commercial projects.

Typical Budget £25,000 – £150,000+

Explore CasaSteel →

CasaMove

Caravan Act. Family Annexes.

Modern, fully insulated mobile family annexes designed around the Caravan Act route. Features 1 & 2 bedroom layouts (32–60m²) with kitchen, shower room and full interior finish.

Starting Price (inc. VAT) From £49,900

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CasaPrefabric

Permanent. Residential. Commercial.

A fully insulated prefabricated building system suitable for permanent annex homes, commercial buildings, offices and public sector projects.

Typical Budget £40,000+

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CasaSteel Shells

Engineered. Numbered. Delivered.

Custom steel building kits supplied ready for assembly. Ideal for homeowners, builders and commercial clients looking for complete flexibility.

Kit Options & Guide Prices:

Frame Kit: from £180/m²
Shell Kit: from £300/m²
Shell Plus: from £400/m²

Request Shell Quote →

CasaOutdoor

Aluminium-Glass Systems

Modern outdoor living solutions including glassrooms, verandas, pergolas, louvred roofs and awnings to extend your living space outdoors.

System Type Glassrooms & Pergolas

Explore CasaOutdoor →

APPLICATIONS & USES

Trusted Across Residential & Commercial Projects

Our modular, steel and outdoor building systems are engineered to accommodate a wide variety of spatial needs:

Residential & Leisure

Garden Offices Garden Rooms Golf Simulator Rooms Home Gyms Guest Suites Granny Annexes Outdoor Living Spaces Workshops Hobby Studios

Commercial & Infrastructure

Commercial Buildings Classrooms Healthcare Facilities Site Cabins Sales Offices Storage Buildings Pop-up Kiosks

Our Process

01.

Free site survey

Photos/measurements or on‑site visit; you can reach every type of product in just seconds.

02.

Tell us about your project.

Send us your dimensions, sketch, drawings or simply describe what you would like to build.

03.

Fixed proposal

Our team will assess your requirements and advise whether CasaBox, CasaSteel, CasaPrefabric, CasaSteel Shells or CasaFrame is the most suitable solution.

04.