House Extensions Thornhill

Upgrade Your Space With A Bespoke House Extension

Enquire About Your Home Extension

Want to learn more about our home extension solutions in Thornhill? Complete the form to request a convenient call back, or connect with our team directly over the phone.

Smart Extension Solutions for Thornhill Homes & Properties

At MRJ Extensions, we understand the needs of modern property owners in Thornhill. Space is valuable, whether you're living in a growing family home or managing a portfolio of investment properties. Our house extension services are designed to make the most of your existing structure while adding new functionality and charm. From open-plan kitchen extensions to fully integrated garage conversions, we help you reimagine your space the smart way.

Working with MRJ means working with a local team that values precision, planning, and professional execution. We handle the entire process, from architectural plans to the final build, ensuring every detail supports your vision. Explore the benefits of a home that evolves with your needs, without leaving your postcode.

The 4 Key Stages of Your Extension Project

  • 1. Consultation & Feasibility: We start by understanding your vision and inspecting the property to confirm what’s possible based on layout, structure, and planning rules.
  • 2. Design & Planning: Our architects create detailed designs and, if required, we manage the planning permission or permitted development paperwork with the local Council.
  • 3. Construction Phase: All groundwork, structural work, roofing, and internal finishes are carried out by our experienced team, on time and on budget.
  • 4. Final Sign-Off & Handover: Once the work is complete, we conduct a final walkthrough, ensure building control sign-off, and hand over a finished space that’s clean, safe, and ready to enjoy.

Why Homeowners Trust MRJ Extensions

  • Fast, Friendly, and Professional: From your first call to final handover, we treat your project like it’s our own.
  • Licensed and Insured: Fully compliant with local building regulations and safety standards.
  • Project Management Included: A single point of contact ensures streamlined communication and zero confusion.
  • Clear Quotes, No Surprises: Transparent pricing and detailed scopes of work to eliminate unexpected costs.

We work closely with each client to understand their goals and deliver outcomes that match their vision, and their budget.

What is a wrap-around extension?

A wrap-around extension combines a rear and side extension to maximise space. It’s particularly popular for creating large open-plan kitchens with dining and living areas.

Can I build an extension on a listed building?

Extensions to listed buildings require listed building consent, in addition to planning permission. Strict controls apply to protect the building’s character and historic features.

How do I choose the right builder for my extension?

Look for local builders with strong reviews, insurance cover, and experience in extensions. It’s also wise to request references and view past projects.

What hidden costs should I expect in an extension?

Common extra costs include groundworks, utility connections, and unforeseen structural issues. Always budget at least 10–15% extra for unexpected expenses.

Is it cheaper to extend or move house in the UK?

For many, extending is cheaper than moving once you account for stamp duty, legal fees, and moving costs. Plus, you can stay in the area you love while gaining extra space.