HOUSE EXTENSION
At Studio Casa, we specialise in house extension design, delivering all the necessary drawings homeowners across London need to build. Our Full Design Package includes Planning Permission, Building Regulations and Structural Design for homeowners across London.
Whether you are looking to create a larger kitchen, open-plan living area, additional bedroom or family space, we provide all drawings in one place to simplify the entire process.
TYPES OF HOUSE EXTENSION
• Rear Extensions
One of the most popular extension options, ideal for enlarging kitchens, dining rooms and family living spaces while improving the connection to the garden.
• Side Return Extensions
Commonly used in Victorian and terraced properties to transform narrow side alleyways into wider and brighter open-plan living spaces.
• Wraparound Extensions
A combination of rear and side extensions that significantly increases ground floor space and allows complete internal reconfiguration.
• Double-Storey Extensions
An efficient way to increase both ground and first floor accommodation while maximising long-term property value.
• Kitchen Extensions
Designed to create larger and more functional kitchen and dining spaces with improved natural light and circulation.
COMPLETE HOUSE EXTENSION DESIGN PACKEGE
Our house extension 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.
PLANNING PERMISSION & STRUCTURAL DESIGN
Many house extensions can be carried out under Permitted Development rights, while others require full Planning Permission depending on the size, location and design of the proposal. Our team carefully assesses your property and manages both Planning Applications and Lawful Development Certificate submissions where required.House extensions also involve important structural considerations such as steel beams, foundations, roof alterations and open-plan layouts. 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.
CONSTRUCTION-READY DRAWINGS
We produce detailed and coordinated drawing packages developed for real construction use on site. Our drawings help contractors better understand structural sequencing, steel installation and construction details, reducing ambiguity and minimising delays during the build.
CLEAR 3D DESIGN PROCESS
We use advanced 3D scanning and modelling technology to create accurate digital models of the existing property and proposed extension.This allows homeowners to clearly visualise the project before construction begins while helping identify potential structural constraints, layout conflicts and head height issues early in the design process.
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.