Google Ads and Analytics use Consent Mode. If you Reject, limited cookieless page-view and conversion signals support modelled measurement. If you Accept, your submitted email and optional phone are hashed for ad measurement.Privacy Policy

Chat on WhatsApp
Skip to main content
Serving All of West Sussex

Architectural Design in West Sussex

Hampshire Build is an architectural design practice proudly serving West Sussex. We specialise in house extensions, loft conversions, and planning permission.

With fixed-fee packages from £1,950 + VAT, we offer transparent pricing with no hidden costs. Our local expertise covers Chichester, Horsham, Crawley, Worthing, Haywards Heath and all West Sussex towns.

Why Choose Hampshire Build?

  • Fixed-fee packages from £1,950 + VAT
  • Consistent planning process with a strong application record
  • Complimentary feasibility consultation
  • Your survey and drawing schedule will be agreed with you after instruction.
  • Building regulation drawings prepared for Building Notice submission; required structural calculations by an independent qualified structural engineer

Our Services Across West Sussex

House Extensions

Single and two-storey extensions

From £1,950 + VAT

Loft Conversions

Bedrooms, offices and living spaces

From £1,950 + VAT

Planning Permission

Expert council navigation

From £1,950 + VAT

Areas We Serve in West Sussex

Click on your town to learn about local planning requirements and how we can help with your project.

Chichester

Historic cathedral city with Roman heritage

Horsham

Market town with excellent transport links

Crawley

Near Gatwick Airport with modern infrastructure

Worthing

Coastal resort with Victorian architecture

Haywards Heath

Mid Sussex commuter town with village feel

Our Fixed-Fee Packages

Pre-Build Package

£1,950+VAT

  • Planning Drawings
  • Building regulation drawings prepared for Building Notice submission
  • Structural calculations by an independent qualified structural engineer
Most Popular

Premium Package

£2,950+VAT

  • Defined design and documentation scope
  • Contractor Vetting & Proposals
  • Client-Focused Building Contract
  • Contractor vetting and a client-focused building contract.

Premium Plus Package

£3,950+VAT

  • Expanded pre-construction scope
  • Staged programme of works mapped to contractor stage payments
  • Building Notice submission and one Party Wall notice

Ready to Transform Your West Sussex Property?

Book a complimentary consultation today – no obligation, no hidden fees.

Explore Our Other Service Areas

Hampshire Build provides extension design services across 8 counties in South England. Explore our other locations:

Hampshire
Surrey
Hertfordshire New!
Berkshire
Buckinghamshire New!
Oxfordshire
Wiltshire
View all service areas

Public council planning decisions

Recent planning decisions in West Sussex

Updated 10 October 2026

In the 12 months to 10 October 2026, The local planning authorities decided 265 householder home-improvement applications near Chichester, Horsham, Worthing, Haywards Heath, Bognor Regis in West Sussex in the cached public records — 250 approved.

Coverage: Sampled 2 km town-centre catchments: Chichester, Horsham, Worthing, Haywards Heath, Bognor Regis; not a county-wide total. Extensions, loft conversions, dormers, garage conversions and porches only. Records without clear householder classification, location or final decision are excluded. Proposal summaries describe the home-improvement element; see the council record for the full proposal. This is not a complete council-register census.

These are public council decisions about other people’s applications. They are not Hampshire Build projects and do not predict the outcome of your project.