How to Find a Good House Extension Builder: A Homeowner’s Guide

HomeReal Estate

  • Author Jenifer Lara
  • Published June 10, 2025
  • Word count 693

Planning a home extension is an exciting step – whether it’s for a new kitchen-diner, a bigger living room, or extra space for the kids. But the key to a successful project lies in choosing the right professional. So, how do you find a good house extension builder who’s reliable, experienced, and right for your home?

In this guide, we’ll walk you through everything you need to consider before signing on the dotted line. From checking credentials to spotting red flags, here’s how to make sure your build is in safe hands.

  1. Start With Recommendations

Word of mouth is still one of the most trusted ways to find quality builders. Ask friends, neighbours, or colleagues who’ve had extension work done recently. What was their experience like? Was the work completed on time and on budget? Were there any issues after the build?

You can also check local community groups online, such as on Facebook or Nextdoor, where homeowners often share honest reviews of tradespeople.

  1. Do Your Online Research

Once you’ve got a few names, look them up online. A good builder will have:

A professional website with examples of previous projects

Verified reviews on platforms like Google, Checkatrade, or Trustpilot

Clear contact details and company registration

If they’ve been featured in magazines or received industry awards, that’s a bonus – it shows they’re well-established and respected.

  1. Check Their Experience

Experience matters – especially in London, where properties often have quirks and strict planning rules. You want a builder who has:

Worked on similar property types (e.g. Victorian terraces, 1930s semis)

Dealt with local planning authorities

Completed house extensions, not just general renovations

Ask for a portfolio or case studies. A reputable builder should be proud to showcase their work.

  1. Ask the Right Questions

When meeting a builder, don’t be afraid to ask tough questions. These will help you gauge their professionalism and approach:

Can you provide references from recent clients?

Will you manage the whole project or subcontract parts of it?

Do you offer a written quote and contract?

Are you insured, and do you offer guarantees?

Also, find out who will be your point of contact during the project. Clear communication is just as important as quality workmanship.

  1. Compare Quotes – But Don’t Just Go for the Cheapest

Once you've spoken to a few builders, get at least three written quotes. These should be detailed and include labour, materials, and timelines.

Watch out for:

Vague or suspiciously low quotes (they often lead to hidden extras later)

Demands for large upfront payments

Cash-only arrangements with no paperwork

Instead, look for a builder who offers transparency and a realistic schedule. A slightly higher quote from a reliable builder is usually better value in the long run.

  1. Visit Past Projects If You Can

There’s nothing like seeing a builder’s work in person. If possible, visit a completed extension or speak to a past client. Ask about their experience during the build — did the team turn up on time? Was the site kept tidy? Did any issues get resolved quickly?

These insights can make a huge difference in your decision.

  1. Trust Your Instincts

Finally, go with your gut. If a builder is pushy, avoids answering questions, or seems disorganised, think twice. A good working relationship is key, especially on projects that can last several months.

You should feel confident that your builder understands your vision and respects your home.

Why Consider Build Abode?

If you're looking for a dependable team of house extension builders, Build Abode has earned a solid reputation across London for quality, honesty, and customer care. With experience in all types of home extensions, they handle every step — from initial consultation to final finish — with professionalism and pride.

Final Thoughts

Choosing the right builder isn’t just about price — it’s about trust, experience, and communication. Take your time, do your research, and don’t settle for anything less than a team that treats your home like their own.

Now that you know how to find a good house extension builder, you’re one step closer to bringing your dream space to life.

Learn how to find a good house extension builder with expert tips on research, quotes, and red flags to ensure a smooth and successful home project.

https://www.buildabode.co.uk/house-extension-builders/

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