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How to Choose the Right Builder for Your Extension

From checking accreditations to understanding contract types — a comprehensive checklist for selecting your design & build partner.

How to Choose the Right Builder for Your Extension

The Most Important Decision of Your Project

A home extension is a massive financial and emotional investment. Selecting the right contractor is the single biggest factor in determining whether your project runs smoothly, on budget, and to the expected standard.

Look Beyond the Quote

The cheapest quote is rarely the best. Unscrupulous builders often submit artificially low estimates, only to hit you with 'extras' once the roof is off. Look for transparent, itemised quotes that break down labour, materials, and contingencies.

Verify Their Past Work

Always ask to view completed projects and, crucially, speak to previous clients. Ask about their communication style, punctuality, and how they handled unforeseen problems (because every build has them).

Contracts and Insurance

Never proceed without a formal, written contract (such as a JCT Home Owner Contract) detailing payment schedules tied to specific milestones. Ensure they hold comprehensive Contractors All Risk insurance and Public Liability insurance.

At APEX, we believe in radical transparency, fixed-price contracts, and continuous communication throughout the build lifecycle.

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Written by APEX Insights

We share our architectural expertise to help London homeowners make informed decisions.

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