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Fixed-Fee Pricing
Planning drawings · Building regulation drawings · Structural calculations
No hourly rates, no hidden costs. Our extension designer packages cover everything from planning drawings through to full building regulation drawings. Calculate your total extension cost
Questions about which package is right for you?
Council and planning application fees are paid separately, directly to the local authority. Approval is always the local authority's decision.
Council and planning application fees are paid separately, directly to the local authority. Approval is always the local authority's decision.
Council and planning application fees are paid separately, directly to the local authority. Approval is always the local authority's decision.
Payment Terms
£250 + VAT deposit on instruction — balance due on completion of design consultation. Simple two-payment structure, no milestone payments.
Additional storey: £750 + VAT | Loft conversion: £950 + VAT
Feature Breakdown
← Swipe left to compare all three packages →
| Feature / Service |
Pre-Build Package
£1,950 +VAT
|
Premium Package
£2,950 +VAT
|
|
|---|---|---|---|
| Feasibility report | |||
| On-site measured survey | |||
| Design consultation | |||
| Planning drawings | |||
| Planning application | |||
| Building regulation drawings | |||
| Structural calculations (qualified engineer) | |||
| Schedule of works | – | ||
| Professional contractor vetting | – | ||
| Contractor proposals (2 teams) | – | ||
| Client-focused building contract | – | ||
| Site Set Up Meeting | – | – | |
| Unlimited structural revisions | – | – | |
| 2 on-site superstructure visits + reports | – | – | |
| Continual remote support throughout build | – | – |
Everything you need to go to tender — planning to structural calculations
The Pre-Build Package takes your project from initial concept to build-ready. We carry out a professional on-site measured survey, produce your planning drawings, submit and manage your planning application, then deliver a full set of building regulation drawings with engineer-certified structural calculations.
Peace of mind: with certified calculations and complete technical drawings in hand, contractors can quote with confidence. No gaps, no guesswork, no re-drawing costs down the line.
Building Notice submission is typically handled by your builder. Building regulation drawings are included; Building Control fees are not.
The complete solution for clients who want the right contractor, on the right terms
The Premium Package includes everything in the Pre-Build Package, plus the protections that matter most before a build begins. We produce a detailed Schedule of Works, introduce you to vetted contractors, and prepare a client-focused building contract so the price, scope and terms are agreed in writing before anyone breaks ground.
Peace of mind: we've seen too many homeowners enter a build with a single-page quote and no written scope. The Premium Package closes every one of those gaps before work starts.
Hampshire Build's involvement concludes at contract execution. For on-site support during the build itself, see the Premium Plus Package.
For clients who want Hampshire Build in their corner throughout the build
The Premium Plus Package includes everything in the Premium Package — then stays with you once the build is underway. We open the project with a Site Set Up Meeting alongside you and your contractor, and attend your site in person at the key structural stages with a written report after each visit.
Unlimited structural revisions are also included throughout, at no extra charge — every revision is covered.
On-site attendance and structural revisions are provided as set out in clause 10 of our Terms & Conditions .
Book Directly With Mark
Book directly with Mark for a no-obligation call about your project.
⏰ Mark typically books up 7–10 days ahead — grab your slot now
What Our Clients Say
"Hampshire Build provide a well designed architectural service that helps demystify the renovation process. Professional throughout."
— Mark Isaac, Winchester
"Mark and his team made our garage conversion such a smooth and pleasant experience. The quality of building work was superb."
— Martyn Freemantle, Basingstoke
"The on-site support was invaluable — as newbies to all this, it's a no-brainer."
— Alice N'Love, Hampshire Build Premium Plus Package Client
Start Your Project
Start with a complimentary 30-minute consultation to discuss your project and explore your options.
We typically respond within 2 hours during business hours