Rear Extension Design Services
Reconnecting Your Home With the Garden. Sussex & Surrey.
Why Sussex Homeowners Trust ArchEvolve With Rear Extensions
- 15 years of experience
- 350 planning approvals secured
- 500 projects completed
- Revit 3D modelling as standard
- MCIAT-chartered accreditation
Rear Extensions Alongside Related Services
Rear Extensions: Where Light and Layout Get Overlooked
Common challenges
- Extensions that create a dark middle room between old and new
- Rooflights positioned without proper daylight modelling
- Poor connection between the extension and the existing kitchen or living space
- Boundary and permitted development limits misunderstood
- Drainage and manhole positions ignored until construction
- Designs copied from a template rather than fitted to the plot
How ArchEvolve solves them
- Layouts designed to eliminate dark middle rooms
- Rooflight positions modelled against real daylight and sun path
- Extension and existing space designed as one connected layout
- Permitted development and boundary limits confirmed before design
- Drainage surveyed and resolved at the concept design stage
- Drainage surveyed and resolved at the concept design stage
How an ArchEvolve Project Works
Initial Consultation
Feasibility Assessment
Concept Design
Planning Application
Building Regulations
Construction Drawings
Construction Support
years of experience
Planning approvals
projects completed
largest construction project developed
Proudly Serving Homeowners Across Sussex and Surrey
A Different Standard of Design for Rear Extensions in Sussex and Surrey
3D Visualisations Included
Every rear extension project is modelled in Revit and rendered in Enscape. You see accurate light, materials and spatial quality before a planning application goes in.
Faster Planning Submissions
Drawings produced in a coordinated 3D environment are more complete and less prone to officer queries, which keeps your rear extension timeline on track.
Local Planning Knowledge
ArchEvolve has submitted rear extension applications across West Sussex, East Sussex and Surrey planning authorities. Your submission is prepared for the specific council from day one.
End-to-End Service
From feasibility through to construction drawings, Alex Page manages every stage of your rear extension project personally. No handoffs, no junior staff taking over mid-project.
Rear Extension Design Across Sussex and Surrey
Many single storey rear extensions fall under permitted development, subject to depth limits that vary for detached, semi-detached and terraced properties. Our guide to extension limits covers the current thresholds.
Permitted development depths vary by property type and whether a neighbour consultation scheme is used for larger single storey rear extensions. ArchEvolve confirms your specific limits at the free initial consultation.
Costs depend on floor area, glazing specification and groundworks. See our house extension cost guide for typical ranges.
Only if the design does not account for it. ArchEvolve models daylight and rooflight positioning at concept stage specifically to avoid the dark, boxed-in middle room that poorly designed rear extensions often create.
Yes, this is one of the most popular combinations for terraced and semi-detached properties, and is covered by our side return extension service.
The service covers feasibility and permitted development assessment, 3D concept design, planning or Lawful Development Certificate application, full Building Regulations drawings, and construction drawings for your builder.
ArchEvolve covers West Sussex, East Sussex and Surrey, including Worthing, Horsham, Chichester, Crawley, Guildford and Brighton, with a free initial consultation offered throughout the region.
Frequently Asked Questions
Start Your Rear Extension Design Today
