Basements

Basement Builders London – Design and Build Basement Construction Specialists

At Bloom Builders, we are specialist basement builders in London, delivering complete design and build basement construction for residential and mixed use properties. We deliver both full construction packages and shell only basement builds, depending on project requirements, programme and budget.

Our basements are designed to integrate structurally with the existing building while creating high quality, functional living space that adds long term property value.

Our Basement Construction Services

Excavation and Structural Works (“The Dig”)

Our excavation and structural works create the foundation for a safe, long lasting basement structure, including:

• Underpinning and structural sequencing
• Controlled excavation and spoil removal
• Temporary works design and structural propping
• Skip licences, hoarding licences and logistics planning
• Conveyor installation where required
• Full labour, plant and materials management

Basement Waterproofing

Long term waterproofing performance is critical to basement construction. Our systems typically include:

• Delta membrane systems to floors and walls with manufacturer backed guarantees
• Groundwater and foul water pump systems with alarm and battery backup protection
• Maintainable drainage and service access strategies

Basement Fit Out

We deliver full basement internal construction and fit out including:

• Partition construction and acoustic separation
• Plastering and internal finishes
• Electrical and heating system installation
• Bathroom and kitchen construction
• Decoration and final finishes
• Bespoke joinery and storage solutions

Legal and Technical Compliance

We support the full statutory and legal process including:

• Party wall agreements and neighbour liaison
• Licences to alter and freeholder approvals
• Coordination with structural engineers and building control

Health and Safety

All projects are delivered in line with Construction Design and Management Regulations (CDM), ensuring safe site management throughout construction.

Basement Projects Delivered in London

Our portfolio includes a wide range of basement and structural renovation projects across South West London including:

• Huron Road SW17 – Full house renovation with basement living space and kitchen installation
• Montholme Road – Structural renovation and extension works with high quality internal fit out
• Rodenhurst Road – Full structural reconfiguration and extension with contemporary internal layout

Basement Conversion Cost Guide London

Basement construction costs vary depending on depth, structure, access and internal specification.

Typical London ranges:

Shell Construction
Approximately £3,000 per m2

Full Basement Construction and Fit Out
Approximately £6,000 per m2

Each project is site specific. We provide detailed cost advice before construction to reduce risk and budget uncertainty.

Basement Design Ideas

Basements are often used to create:

• Home cinemas
• Gyms and wellness spaces
• Wine storage and tasting rooms
• Guest bedrooms
• Home offices
• Playrooms and family spaces

Each basement is designed around the building constraints and the client’s long term use of the space.

Start Your Basement Project

As experienced basement builders in London, we deliver structurally robust basements designed for long term performance and daily use.