Business Details
22 Years
experience
Professional Basement Construction Services London
Established in 2004, Basement Masters has become one of London's leading specialists in basement design and construction. Our team of dedicated professionals combines decades of industry experience with advanced technical qualifications to deliver complex projects across new builds and retrofit solutions. We provide a comprehensive one-stop service encompassing architectural design, structural engineering, reinforced concrete construction, waterproofing, and interior finishes. Our expertise extends to terraced, semi-detached, detached properties, and ground-floor flats, with every project benefiting from meticulous attention to detail and quality standards. Accredited by the Federation of Masters Builders and British Structural Waterproofing Association, we offer a 10-year insurance-backed warranty on all conversions.Our commitment to innovation ensures the application of cutting-edge techniques while maintaining sustainable practices throughout the construction process. The company's in-house capabilities eliminate the need for third-party contractors, ensuring seamless project delivery from initial concept to final handover. Client satisfaction remains paramount, demonstrated through tailored solutions that enhance property value while meeting individual spatial requirements. This approach has resulted in hundreds of successfully completed projects across London and surrounding areas, establishing a reputation for reliability and technical excellence.
Services
Basement Design
Retrofit Construction
Waterproofing Systems
Structural Engineering
Underpinning
Drainage Solutions
Interior Finishes
Geotechnical Surveys
Details
- Year established: 2004
Highlights and features
- 20 years of specialist basement construction experience
- Full-service in-house design and build capabilities
- Accredited by leading industry trade associations
- 10-year insurance-backed warranty on all conversions
- Specialist team with technical qualifications in basement engineering
Associations and certifications
- Federation of Masters Builders
- British Structural Waterproofing Association
- Basement Waterproofing Association
- Approved Delta Installers
What people say
Excellent service
High standard of work
Completed before deadline
Professional crews
Impressive performance
Services
Basement Design
Our specialist architects and engineers create tailored basement designs that maximise usable space while ensuring structural integrity. The process includes feasibility assessments, planning applications, and detailed construction drawings. Each design considers ground conditions, drainage requirements, and client-specific spatial needs for both residential and commercial properties.
Retrofit Construction
We transform existing properties through comprehensive retrofit basement solutions that enhance living space and property value. Our approach maintains structural stability while incorporating modern waterproofing systems and utility infrastructure. Projects include underpinning, reinforced concrete construction, and integrated drainage solutions for terraced, semi-detached, and listed buildings.
Waterproofing Systems
Our waterproofing solutions employ cavity drain membranes with sump pumps as standard, with alternative tanking systems available for specific projects. All installations meet British Standard 8102 requirements, ensuring long-term protection against water ingress in both new and existing basement structures across residential and commercial properties.
Structural Engineering
In-house structural engineers provide detailed calculations and specifications for all basement projects. Services include load-bearing assessments, reinforced concrete design, and steelwork integration. Our team ensures compliance with building regulations while maintaining structural integrity during and after construction for both new builds and retrofit projects.
Underpinning
We specialise in traditional underpinning methods for retrofit basement conversions, ensuring stability in existing structures. The process involves sequential excavation and concrete pouring to create secure foundations. Our approach minimises settlement risks while enabling safe excavation to required depths for residential and commercial basement extensions.
Questions
What types of basement projects do you handle?
We specialise in both new build and retrofit basement projects for residential properties including terraced, semi-detached, and detached houses across London and surrounding areas.
Do you provide free initial assessments?
Yes, we offer a free basement survey and quotation to evaluate project feasibility, budget requirements, and potential property value increase before commencing any work.
Are your basement conversions guaranteed?
All our basement conversions come with a 10-year insurance-backed warranty covering structural integrity and waterproofing performance.
How long does a typical basement project take?
Project duration varies by complexity but typically takes 4-6 months from design approval to completion, including necessary planning and building regulation approvals.
Do you handle planning permissions?
Yes, our team manages the entire planning process including party wall agreements, building regulations applications, and local authority submissions as part of our comprehensive service package.
What areas do you cover?
We operate primarily across London and surrounding counties including Hertfordshire, Surrey, Essex, and Buckinghamshire for residential basement construction projects.
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Reviews (3)
George Downing
Jul 06, 2019
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We have recently done business with Eric at Basement Masters London, highly recommend. Very professional and pleasure to work with.
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George- Whole In one Golf
Fortnite Videos
Sep 13, 2018
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We had a great experience dealing with Basement Masters from start to finish. They really are a one-stop-shop when it comes to basements. I would certainly recommend the company to anybody looking to have a basement conversion. We have received so much positive feedback from friends and neighbours on our finished basement.
Arhon Ankhkara
Jan 23, 2018
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Basement Masters are an excellent team of professionals, and a pleasure to do business with. Outstanding work.
