How long does a single storey extension take?

A typical single storey rear extension takes 12-16 weeks from groundworks to completion. This includes 2-4 weeks pre-construction, 1-2 weeks foundations, 2-3 weeks superstructure, and 6-8 weeks for first fix through to finishing.

What inspections do I need for an extension?

Building control inspections are required at key stages: foundations (before pouring concrete), drainage, structural steels, and a final inspection for the completion certificate. Our planner shows exactly when each inspection is needed.

Can I manage my own extension project?

Yes, many homeowners successfully self-manage their extension by hiring individual trades. Our planner helps you understand what trades to book when, what materials to order, and which inspections to schedule.

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Extension Project Planner

Get a personalised, phase-by-phase timeline for your home extension. Track progress, manage inspections, and know exactly what to order when.

Takes under 2 minutes

What you'll get:

Phase-by-phase construction timeline
Building control inspection schedule
Inspection photo documentation
Materials lists for each stage
Trade booking reminders
AI-powered tips and insights
Task completion tracking

LAUNCH OFFER

One-time payment

£15.99

£49

See your extension project at a glance

A clear, phase-by-phase timeline with everything you need to manage your build - on any device

Works on desktop and mobile

Track your project from anywhere - check tasks on site from your phone, or plan ahead from your laptop.

Built for self-builders and project managers

Inspection Checkpoints

Never miss a building control inspection. Clear markers for foundation, drainage, and final inspections.

Inspection Photos

Document each inspection with photos. Get tips on exactly what to photograph for your records.

Lead Time Warnings

Get alerts to order long-lead items at the right time - steels, bifolds, kitchens and more.

Materials Lists

Each phase includes estimated quantities. Link directly to PriceNailer for price comparison.

AI Insights

Get practical tips for each phase. Learn from common mistakes before they happen.

Progress Tracking

Check off tasks as you complete them. See overall progress at a glance.

Ready to plan your extension?

Answer a few questions and get your personalised project timeline in minutes.

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