Basement kitchen with garden
Logo of Considerate Construction Scheme

Basement Conversion in Battersea

A modern basement conversion in Battersea inherently increases the value of your southwest London property, but it requires specialist knowledge to meet council standards.

Proficiency Design & Build has extensive experience in basement conversions, combining exceptional craftsmanship with award-winning designs that completely transform your existing basement space.

High end side return extension

Rated 4.9/5 on

Fantastic builders who really care about the quality of finish.

Portrait of Oliver Meek

Oliver Meek ( Director At Rio Cinema )

Why Choose Proficiency

14+ Years
Of Experience

With nearly two decades of experience, our team specialises in basement projects throughout Greater London and the Home Counties. We are familiar with local building controls and the architectural heritage of this SW11 conservation area.

Reliable Project Management

Every Battersea basement conversion and home extension is assigned a dedicated project manager who manages timelines, inspections, and communication. This approach ensures clarity, accountability, and smooth construction work from day one.

High-End
Results

Our interior design experts collaborate with skilled tradesmen and trusted suppliers, delivering high-end interiors that feel luxurious and durable. From bespoke joinery and lighting to high-quality materials, each detail is executed to the highest standard and increases the value of your property.

SW11 Basement Conversion Experts

Our basement conversion contractors help Battersea homeowners unlock extra space in their homes by transforming existing basements into beautiful and functional living areas.

Our experienced team manages planning permissions, local building code regulations, and party wall agreements directly through Wandsworth Council on your behalf.

From private home gyms and swimming pools to home offices, family rooms, utility rooms, and wine cellars, our basement conversion specialists strive to exceed your expectations while adhering to industry-approved safety regulations that ensure ultimate customer satisfaction.

Basement Conversion Process

Free Assessment

We begin every new basement conversion project with an on-site assessment to evaluate feasibility, structural integrity, drainage, and planning applications, to help us determine the most realistic conversion and planning process.

Design & Structural Engineering

Our architectural and interior designers produce detailed plans and technical 3D-rendered drawings to accompany your planning application.

Excavation & Structural Work

All groundworks, including basement excavation and structural alterations, are carried out in full accordance with current regulations of the UK's construction industry.

Waterproofing & Drainage

We install compliant waterproofing systems in line with BS 8102:2022 standards, protecting your new basement from damp and water ingress.

Fit-Out & Handover

Award-winning interiors with bespoke finishes and layouts ensure your new basement is completed to the highest standard.

Our Construction Company

Proficiency Design & Build is a London-based basement conversion company offering construction services across Greater London and the surrounding areas.

  • Federation of Master Builders member - Recognised for high-quality workmanship, professionalism, and financial stability.
  • Fully Insured - Complete insurance coverage, including Public Liability, Professional Indemnity, and Contractors All Risk. We are also NICEIC and Gas Safe approved.
  • Considerate Contractor Scheme - Committed to respectful site management and environmental responsibility.

Our Building Projects

open plan kitchen extension
The Avenue, Queen's Park Side Return House Extension View Project
Modern house renovation
Conewood Street, Highbury Side Kitchen Extension View Project
kitchen
Cambridge Road, Twickenham Open Plan Kitchen Extension View Project
open plan Kitchen renovation
Wesbere Road, West Hampstead Kitchen Renovation View Project

Luxe Basement Conversion Services

Residential basement renovation in London

Refurb

Reconfigure and upgrade existing basements in Battersea with enhanced layouts, lighting, and refined finishes.

residential basement fit out

Conversion

Comprehensive house conversions are handled by experienced basement conversion builders from start to finish.

wine cellar fit out

Cellar

Customised cellar conversions for wine storage, home bars, and entertainment spaces, tailored to Battersea, SW11, homes.

Building a room

Work With Basement Conversion Experts

Contact Proficiency Design & Build for all your basement conversions in Battersea.

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