// UK RESIDENTIAL ARCHITECTURAL SERVICES
Extensions
Single Storey, Double Storey or Porch Extension
TECHNICAL DRAWING PACKAGE
1. Service Overview & Scope
Expand your home with a thoughtfully designed house extension that creates valuable additional space while complementing the existing character of your property. We provide professional CAD and architectural drawing services for a wide range of residential extension projects, from initial concepts through to detailed technical drawings.
We specialise in single-storey rear extensions, side extensions, wrap-around extensions and double-storey extensions, creating practical layouts that make the best use of your available space.
Our team prepares accurate existing and proposed floor plans, elevations, sections, roof plans and detailed construction drawings, along with Planning Drawings and Building Regulation Drawings.
2. Package Deliverables Checklist
INCLUDED AS STANDARDExisting & Proposed Floor Plans (1:50 / 1:100)
Existing & Proposed Elevations (1:50 / 1:100)
Existing & Proposed Sections
Roof Plan
Building Regulations Drawings & Specification Notes (where ordered)
3. Technical Compliance & Specifications
- Fully Compliant with Local Authority Submission Standards
- Native DWG & High-Resolution Vector PDF Export
4. Who This Service Is Ideal For
Homeowners extending a kitchen or living spaceSingle-storey, double-storey and wrap-around extensionsPorches and side returns
5. Relevant Project Case Studies
View All
6. Extensions FAQs
Many single-storey rear extensions fall under Permitted Development — typically up to 3m deep on attached houses and 4m on detached houses, or up to 6m / 8m under the prior approval scheme. Double-storey and side extensions, flats and properties in conservation areas usually need full planning permission. We confirm the right route for your property before drawing.
Usually yes. Steel beams, new openings and foundations need structural calculations from a qualified structural engineer. Our drawings are prepared to coordinate with your engineer’s design.
If the planning officer requests minor amendments or extra notes during validation, we update the drawings free of charge. Larger design changes requested after determination are quoted separately.
Yes. We prepare full architectural planning drawing packages formatted specifically to UK local planning authority validation requirements. This includes existing and proposed floor plans, elevations, sections, roof plans, and site location/block maps.
Yes. We create comprehensive technical drawing packages compliant with UK Building Regulations Approved Documents (Parts A through P). Our packages include construction cross-sections, insulation specifications, structural beam layout markup, drainage, and fire safety details for Building Control approval.
// FIXED-FEE QUOTE
Request Extensions Quote
Send your sketches, property photos, or dimensions for a fixed-fee quote within 24 hours.
FIRST DRAFTS IN 3–5 WORKING DAYS
DRAWN TO LPA & BUILDING REGS STANDARDS