Business Details
Expert Construction and Basement Conversions in London
Established over two decades ago, OLBC (OLBC) has built a reputation for delivering high-quality residential construction projects across London. Specialising in complex basement conversions, major renovations, and listed building restorations, we combine architectural expertise with hands-on craftsmanship to transform period properties while preserving their historical integrity. Our team manages a limited number of projects simultaneously, ensuring meticulous attention to detail and direct client engagement throughout the process. With in-house design, architectural, and structural specialists, we offer a fully integrated turn-key servicefrom planning permissions and listed building consents to interior design and final furnishing.Our commitment to technical excellence is underscored by professional indemnity insurance of 1 million and a proven track record of securing planning approvals across London boroughs. By prioritising transparency, collaboration, and cutting-edge construction techniques, we deliver bespoke solutions tailored to the unique needs of discerning homeowners.
Services
Basement Conversions
Listed Building Renovations
Structural Repairs
Heritage Conservation
Turnkey Projects
Planning Applications
Interior Design
Project Management
Waterproofing
Swimming Pool Installations
Highlights and features
- We have over 20 years of experience in London's residential construction sector.
- Our in-house specialists handle all aspects from design to final execution.
- We guarantee dry, durable basements using advanced waterproofing techniques.
- Our team holds professional indemnity insurance of 1 million for client security.
- We maintain a 100% success rate in securing planning consents for basement projects.
What people say
Perfect family home
Well beyond expectations
Few snags on large project
Help and support after moving
Stunning results in Kensington
Services
Basement Conversions
We specialise in creating luxurious basement spaces that enhance both property value and quality of life. Our process combines advanced waterproofing techniques with bespoke design to transform underused areas into functional spaces like home cinemas, wine cellars, or swimming pools. With over 20 years of experience in London's challenging ground conditions, we deliver durable, code-compliant conversions that seamlessly integrate with your property's character.
Listed Building Renovations
Our team excels in preserving historical integrity while modernising period properties. We handle complex listed building consents, material analysis for lime mortar and brickwork matching, and sensitive repairs to cornices and joinery. By combining traditional craftsmanship with modern engineering, we ensure compliance with conservation regulations while enhancing livability for contemporary use.
Turnkey Projects
From architectural design to final furnishing, we manage every project phase in-house. Our integrated approach covers planning permissions, structural engineering, interior design, and construction, ensuring cohesive results. Clients benefit from streamlined communication, fixed pricing (subject to ground conditions), and a dedicated project manager overseeing quality control throughout the 24-36 week typical project timeline.
Structural Repairs
We address complex structural challenges in period and modern properties alike. Our specialists handle subterranean structural packages, including reinforced concrete works in waterlogged conditions. With in-house engineering expertise and advanced techniques for party wall agreements, we deliver solutions that meet building regulations while maintaining the property's aesthetic integrity.
Project Management
Our dedicated project managers coordinate every aspect from initial consultation to handover. Services include site assessments, timeline scheduling, contractor coordination, and compliance inspections. We provide regular client updates and maintain strict quality control through our 10-point inspection process, ensuring all work meets our exacting standards and regulatory requirements.
Questions
Will my new basement be waterproof?
Yes. We use advanced plastic cavity membrane systems and sump pumps to ensure dry, durable basements tailored to your property's conditions.
Do London basement conversions require planning permission?
Most projects need planning approval, especially for listed buildings or external modifications. Our 100% success rate in securing consents ensures regulatory compliance.
How long does a typical basement conversion take?
Projects typically take 24-36 weeks, depending on complexity. Our focused approach minimises delays while maintaining quality standards.
What are the benefits of a basement conversion?
Transform underused spaces into luxury living areas while increasing property value by £600-£5,000 per square foot without disruptive extensions.
Can OLBC handle listed building renovations?
Yes. Our expertise includes sensitive restoration of period features like lime plaster, cornices, and joinery repairs for Grade II* and listed properties.
