Outbuildings
At Studio Casa, we specialise in the design of outbuildings, garden rooms and annexes for homeowners across London.
Whether you are planning a home office, gym, studio, entertainment space, guest accommodation or multifunctional garden room, we provide Planning Permission, Building Regulations and structural design fully coordinated under one service.
Outbuildings have become an increasingly popular way to create additional usable space without extending the main house, helping homeowners improve functionality, flexibility and property value while making better use of the garden area.
• Garden Rooms
Modern and flexible spaces ideal for home offices, studios, entertainment rooms or family use.
• Home Offices
Dedicated workspaces separated from the main house, designed to improve comfort, productivity and work-life balance.
• Garden Gyms
Purpose-designed spaces for fitness equipment, training and wellness areas.
• Annexes
Self-contained ancillary accommodation designed to remain linked to the main dwelling while providing additional independence and flexibility.
• Multi-Functional Outbuildings
Combined spaces incorporating storage, offices, gyms, WCs or entertainment areas within one coordinated design.
TYPES OF OUTBUILDINGS WE DESIGN
PLANNING PERMISSION & STRUCTURAL DESIGN
Many outbuildings can be built under Permitted Development rights, while others require full Planning Permission depending on the size, location and intended use of the proposal. Our team assesses your property carefully and manages both Planning Applications and Lawful Development Certificate submissions where required.
Although outbuildings may appear simple, they often involve important structural considerations such as foundations, roof spans, steelwork and drainage coordination. At Studio Casa, structural design is integrated from the beginning of the project alongside planning and Building Regulations drawings, helping create more practical, buildable and cost-efficient projects while reducing issues during construction.
COMPLETE OUTBUILDING
DESIGN PACKAGE
Our outbuilding service includes:
✔ Site Survey & 3D Property Scan
✔ Planning Permission Drawings
✔ Lawful Development Certificate Applications
✔ Building Regulations Drawings
✔ Structural Calculations & Steel Design
✔ Construction Details
✔ 3D Design Visualisations
We create construction-ready drawings that help builders quote accurately and reduce uncertainty during construction.
WHY CHOOSE STUDIO CASA?
Structural & Architectural Coordination
All drawings you need. Planning, Building Regulations and Structural Design under one team.
Residential Specialist
Focused specifically on UK residential renovation and extension projects.
Construction-Focused Approach
Designs developed with real construction experience and buildability in mind.
Faster Communication
Direct coordination between design and structural engineering.
Detailed Technical Drawings
Clear information that supports builders during construction.
Clear 3D Visualisation
Helping homeowners understand the project before construction begins.