Key Takeaway
Compare Hampshire Build's three fixed-fee extension design packages — Pre-Build (£1,950 + VAT), Premium (£2,950 + VAT) and Premium Plus (£3,950 + VAT) + VAT. Find the right option for your project.
Hampshire Extension Designer Packages: 2026 Comparison Guide
All three Hampshire Build packages have fixed fees for the stated scope. Here's a comparison of the defined deliverables:
Have a project in mind? Start with a few details about your home.
Check your extension projectPre-Build Package — £1,950 + VAT (Most Popular)
Perfect for: Homeowners who want a defined design package at a fixed fee.
What's included:
- On-site measured survey of your property
- Planning drawings (plans, elevations, sections, site plan)
- Planning application preparation and submission for the agreed scope
- Building regulation drawings prepared for Building Notice submission
- Structural calculations prepared by an independent qualified structural engineer
- Project documents for contractor pricing
The Pre-Build Package is a design option for kitchen extensions, rear single-storey extensions, two-storey additions, and loft conversions. Contractor pricing and construction delivery are outside this package.
Premium Package — £2,950 + VAT
Perfect for: Homeowners who also want help preparing and comparing contractor proposals.
What's included:
- Professional on-site measured survey and package design documents
- Detailed schedule of works
- Tender documents sent to two vetted contractors
- Comparative proposal report
- Client-focused building contract issued for signature
The Premium Package is ideal when you would like support comparing proposals from two vetted local contractors. Your contractor selection and appointment remain yours.
Premium Plus Package — £3,950 + VAT
Perfect for: Homeowners who want design and contractor tender support, plus a staged programme and specified pre-construction notices.
Ready to apply these ideas to your own home?
Explore your extension optionsWhat's included:
- Package design and tender scope:
- A staged programme of works mapped to contractor stage payments
- Building Notice submission and one Party Wall notice to one adjoining owner
Fixed Fee vs Traditional Hourly Rates
Traditional extension designers may charge by the hour, while Hampshire Build's packages have a fixed fee for the stated scope. A £250 + VAT (£300 + VAT) deposit is due on instruction; remaining payments follow the selected package schedule.
Which Package Is Right for You?
Choose Pre-Build Package if: You have a trusted builder, or are confident finding one, and need planning and building regulation drawings at a fixed price.
Choose Premium Package if: You want contractor vetting, two cost proposals and a client-focused building contract issued for signature alongside the drawings.
Choose Premium Plus Package if: You want a staged programme of works, Building Notice submission and one Party Wall notice included.
Book your complimentary consultation to discuss which package suits your Hampshire extension. No obligation — just straightforward expert advice.
A useful next step for your home
Share a few project details to explore an initial budget and planning view.
