Basement Conversion in London | Call Now!

We work with our clients to provide them with a comprehensive service that’s tailored to their specific needs.

Basement Construction

Looking to maximize your home’s potential? A basement conversion is the perfect way to add extra living space, increase property value, and create a functional area tailored to your needs. At MBT Group, we specialize in high-quality basement conversions near London, delivering expert craftsmanship and innovative designs.

Why Choose MBT Group for Your Basement Conversion?


We’re not just builders, we’re transformation experts. Here's why London homeowners choose us for basement projects:

  • Over a decade of industry experience
  • Expert in basement construction London regulations
  • Complete design and build services
  • Fully insured and qualified professionals
  • Transparent pricing and project timelines
  • End-to-end management for stress-free results


Our customer-first approach and commitment to quality make us the go-to
basement conversion company in London.

Basement Construction

We have the manpower and expertise to take on projects of any size. We strive to exceed expectations in all areas of our business, whether it’s for residential, industrial, or commercial contracts. Our experience means we can bring innovative and cost-effective solutions to basement construction projects. There are a wide variety of methods we can implement to fit the needs of our customers, and our teams will discuss these with you in the planning stages.

Under House

In many cases, we can retrofit a basement based on your specifications by
excavating under the house. This can be done without interrupting your day-to-day
living and you don’t need to have an existing cellar. This hassle-free process
can be completed to any size you require.

Sub-basement

The MBT Group Ltd team can construct multiple level basements, meaning you have freedom to create a space that works for you. Because you’re not restricted to a single level, you don’t have to sacrifice living space to create an additional functional room.

Under Garden

Using open excavation techniques, we can provide you with a basement that
runs under your garden. This is ideal for those who don’t want to excavate directly
under their property or those who want their basement to extend
beyond the blueprints of the house.

 

Types of Basement Conversions We Offer

Whether you have an existing cellar or need a new basement excavation, we offer solutions to fit every home:

  • Retrofit Basement Conversions: We convert existing cellars or storage spaces into habitable rooms, such as lounges, bedrooms, or home gyms.
  • Basement Excavation and Underpinning: No existing basement? No problem. We dig down and create a new basement from scratch, ensuring structural integrity and waterproofing.
  • Lower Ground Floor Enhancements: Perfect for period properties with half-sunken floors. We optimise space and natural light while enhancing access and flow.
  • Utility and Storage Spaces: Need functional areas like laundry rooms, wine cellars, or storage zones? We build them with precision and purpose.

Popular Basement Conversion Ideas

Looking for inspiration? Here are some creative ways our clients use their basements:

 

  • Home Cinema or Media Room
  • Extra Bedroom or Guest Suite
  • Home Office or Study
  • Personal Gym or Yoga Studio
  • Kids’ Playroom or Teen Den
  • Music Room or Hobby Workshop

     

Our team will work closely with you to tailor the space to your needs, style, and budget.

How Much Does a Basement Conversion Cost?

Every project is different, but as a guide of Basement Conversion Cost:

 

  • Cellar Conversion: From £40,000+
  • Full Basement Excavation: From £80,000+
  • Luxury Builds (e.g., home cinemas, gyms): Custom pricing

     

We offer free consultations and no-obligation quotes. All costs are clearly broken down, no surprises or hidden fees.

How We Help You Stay on Budget

Budget-conscious? MBT Group makes it easy:

  • Flexible design choices to match your goals
  • Expert guidance on cost-saving alternatives
  • Clear milestones for staged payments
  • Value-engineered solutions without cutting corners

Our experienced project managers keep everything on track and on budget.

Our Basement Conversion Process

We’ve streamlined the journey for a smooth, stress-free experience:

  • Initial Consultation and Site Assessment
  • Feasibility Study and Planning Advice
  • Detailed Design & Architecture
  • Structural Calculations and Waterproofing Solutions
  • Construction, Fit-out, and Finishing
  • Final Inspection & Handover

We manage everything, including planning permission and building regulations, for complete peace of mind.

Basement Construction in London, Local Expertise You Can Rely On

MBT Group Ltd. understands the unique challenges of basement construction in London, from tight access issues to heritage building considerations. We’ve completed successful basement projects across Central and Greater London, delivering top-tier workmanship with minimal disruption.

As a trusted basement conversion company, we use industry-best practices for waterproofing, structural stability, and ventilation, ensuring your basement remains dry, safe, and energy-efficient.

Ready to Get Started?

Let’s transform your underground space into something extraordinary. Whether you’re after extra room or long-term investment, MBT Group Ltd. is your expert basement conversion company near London.

Contact us today for a free, no-pressure consultation. Let’s build something amazing beneath your feet.

10 Years Guarantee

We’re proud of the services we offer and are confident that we’ll provide the highest quality possible on our basement projects. That’s why we have a 10-year guarantee on all of our basements. Not only does this give our customers total peace of mind, but it also means a good proportion of our business comes from recommendations from happy clients. We aim to be one of the most trusted basement specialists in London, which is why we go above and beyond for our customers.