Build-cost calculator
Estimate construction cost, professional fees, statutory costs and contingency.
In developmentFree tools
Useful answers before you appoint anyone.
We want the website to help homeowners understand feasibility, fees, programme and planning before a sales conversation begins.
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Planned
Planned
Architectural fee estimator
Answer a few questions and get an indicative ARCHITRES fee range.
Try it →Project timeline
See typical durations for survey, design, planning, technical design and pricing.
In developmentPlanning-route checker
Explore whether planning permission, lawful development or further advice may be required.
In developmentAdvice centre
Questions homeowners actually ask.
Future articles can become both genuinely useful guidance and a local search / SEO channel.
How much does a rear extension cost?
Construction cost, professional fees, statutory charges and contingency explained separately.
Planning permission vs permitted development
What the routes mean, where they overlap and why “permitted development” does not mean “no drawings required”.
What are Building Regulations drawings?
What a technical package actually contains and why it matters to pricing and construction.