The technical vault
Free CAD templates, planning guides,and budget tools.
Download what you need. The same tools and templates we use with our clients — now available for free.
Browse resources
Tools for every stage of your project.
Extension Budget Calculator
Pre-formatted spreadsheet covering every cost line — build, professional fees, party walls, building control, skips, and contingency. The same tool we use with our clients.
Permitted Development Quick Reference
A one-page summary of what you can and cannot build under Permitted Development rights. Print it, stick it on the fridge, and refer to it before calling an architect.
10 Questions to Ask a Builder
The exact questions we ask builders before adding them to our vetted network. Use these to separate the professionals from the cowboys.
Room-by-Room Specification Checklist
A checklist for every room covering sockets, switches, lighting, plumbing points, and finishes. Stop forgetting things that cost a fortune to add later.
Extension Floor Plan Template (CAD)
A starter CAD template with standard room dimensions, wall thicknesses, and annotation styles. DWG format, compatible with AutoCAD and free viewers.
Planning Application Checklist
Everything you need to submit with a Householder Planning Application — documents, drawings, forms, and fees. Nothing missed, no delays.
What Will It Actually Cost? Guide
A 12-page guide covering the real costs of a home extension — from architect fees to skip hire. The numbers nobody tells you until the invoice arrives.
Builder Vetting Scorecard
A one-page printable scorecard for comparing builder quotes side by side. Score each builder on price, references, insurance, timeline, and payment terms.
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Start with a professional floor plan from £250. We handle the drawings so you can focus on the vision.
Every plan drawn by qualified drafters in Poole, Dorset
Serving homeowners across Poole, Bournemouth, Christchurch, Wimborne, Wareham, and the wider Dorset area.