Business Details
14 Years
experience
Your Trusted Construction Partner in London
Ernest Sergy Building Services is a dedicated construction firm specialising in comprehensive building solutions for residential and commercial properties. With expertise in interior and exterior refurbishments, renovations, and structural modifications, we deliver tailored services including bathroom and kitchen installations, electrical and plumbing works, carpentry, and decorating. Our commitment to quality is reinforced through partnerships with leading structural engineers, ensuring every project meets rigorous safety and compliance standards. Backed by public liability insurance of 5,000,000 and employer liability coverage of 10,000,000, we adhere to UK health and safety accreditations, including certifications for working with power tools.Our team of NICEIC-certified electricians and Gas Safe-registered plumbers guarantees professional execution across all trades. Client testimonials highlight our reliability, competitive pricing, and meticulous attention to detail, with references available upon request. We prioritise transparency, offering site visits to showcase completed projects and providing accurate, upfront quotations. Our focus on customer satisfaction ensures clean, efficient workspaces and timely project completion, making us a trusted choice for extensions, loft conversions, and structural engineering solutions in London and surrounding areas.
Services
Demolition
Structural Work
Loft Conversions
Extensions
Brickwork
Carpentry
Roofing
Drainage
Restoration
Windows & Doors
Details
- Year established: 2012
Highlights and features
- We partner with leading structural engineers for guaranteed project safety
- Our team holds NICEIC and Gas Safe certifications for electrical and plumbing work
- 5,000,000 public liability insurance for client protection
- Proven track record with verifiable client references available
- Transparent quoting process with no hidden costs
Associations and certifications
- NICEIC
- Gas Safe Register
What people say
Professional team
High standards
Competitive prices
Clean workspaces
Accurate quotes
Services
Demolition
We provide controlled demolition services for load-bearing walls, partition walls, and chimney breasts. Our team uses specialist equipment to ensure safe, precise structural modifications while maintaining site safety. All demolition work complies with UK building regulations and is conducted by trained professionals with power tool certifications.
Loft Conversions
Specialising in loft conversions including Velux, dormer, and mansard designs, we transform unused attic space into functional living areas. Our service includes structural planning, insulation, and finishing touches to create valuable additional square footage while maintaining building regulations compliance throughout the project.
Structural Engineering
Partnering with qualified structural engineers, we deliver RSJ installations and party wall solutions. Our approach combines technical expertise with practical execution to ensure structural integrity for extensions, conversions, and major renovations while providing full documentation for planning permissions.
Extensions
We construct single, double, and multi-storey extensions including side returns, orangeries, and wrap-around designs. Our service covers foundations, brickwork, roofing, and internal finishes to create seamless additions that enhance property functionality while maintaining architectural coherence with existing structures.
Windows & Doors
We supply and install energy-efficient double/triple-glazed windows and doors, including bespoke carpentry work. Our service ensures improved thermal performance, security upgrades, and aesthetic enhancements through precision fitting by experienced tradespeople using modern materials and techniques.
Questions
What construction services do you offer?
We specialise in demolition, structural engineering, loft conversions, property extensions, and full refurbishments including plumbing, electrical, and carpentry work.
Are your tradespeople certified?
Yes, our electricians hold NICEIC certification and plumbers are Gas Safe registered, with all staff completing health and safety training.
What insurance coverage do you provide?
We maintain £5,000,000 public liability insurance and £10,000,000 employers liability coverage through RSA Insurance Group.
How do you handle project timelines?
We provide accurate scheduling with regular progress updates, ensuring timely completion while maintaining quality standards.
Can I see examples of completed work?
Yes, we offer site visits to view ongoing and completed projects, with references available from satisfied private clients.
