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Expert Construction & Building Services in London
Optima Builders is a trusted construction and building company based in North London with over 20 years of hands-on industry experience. Established for over 13 years, we specialise in home renovation, remodelling, extensions, loft conversions, and new builds across North and North-West London. Our approach combines modern design with practical solutions, tailored to each client's lifestyle and vision. We work closely with homeowners, architects, and developers to deliver high-quality results on time and within budget. Our team of expert craftsmen operates 8 hours a day, 6 days a week, ensuring exceptional workmanship and tidiness.

Fully insured with public liability coverage up to 10 million, we are recommended by the Fiji High Commission for property renovations. Our services include structural alterations, plumbing, electrical work, and bespoke carpentry, with a focus on conservation areas and Jewish community projects. We provide free consultations, no-obligation quotes, and issue all necessary certificates upon project completion. Our commitment to clean, respectful work has earned us numerous positive reviews and repeat clients across London.
Services
General Building House Refurbishment Loft Conversion Home Renovation Home Extensions Plumbing Central Heating Electrical Work Painting and Decorating New Builds
Highlights and features
  • We have over 20 years of hands-on experience in construction and renovation.
  • Our competitive pricing maintains quality without compromising standards.
  • Fully insured with public liability coverage up to 10 million.
  • We operate as a one-stop shop with in-house architects and professionals.
  • Specialised experience in serving Jewish communities across North London.
Associations and certifications
  • Gas Safe
  • NICEIC
What people say
Professional and hardworking team Competitive quote and reliable service High-quality results ahead of schedule Excellent communication and responsiveness Many compliments on finished projects
Services
Home Extensions
We design and build bespoke home extensions tailored to your lifestyle and planning requirements. Our services include rear, side-return, and double-storey extensions, with expertise in conservation areas and kosher kitchen layouts. We handle the full process from design to completion, ensuring compliance with local regulations and adding long-term value to your property.
Loft Conversions
Transform unused loft space into functional rooms with our comprehensive conversion service. We specialise in rear dormer, hip-to-gable, and rooflight conversions, incorporating insulation, plumbing, and electrics. Our team ensures compliance with fire safety and planning regulations, particularly in conservation areas across North London.
House Refurbishment
We deliver full or partial house refurbishments, including internal layout redesigns and structural alterations. Our services cover modern heating, plumbing, and smart electrics, with specialist experience in conservation areas. We provide planning support and ensure compliance with heritage requirements while enhancing property value.
Plumbing & Heating
Our certified engineers install and repair plumbing and central heating systems, including Megaflo systems and underfloor heating. We ensure compliance with UK regulations, providing completion certificates for all gas and electrical work. Services include boiler replacement, radiator installation, and smart thermostat controls.
New Build Construction
We offer end-to-end new build construction services, from site clearance to final inspections. Our expertise includes conservation area compliance, structural shell construction, and bespoke interior fit-outs. We coordinate with architects and engineers to deliver energy-efficient homes tailored to client specifications and budget.
People
Daniel Wisniewski
Director & Founder
Polish-born Daniel founded Optima Builders over 13 years ago after gaining extensive construction experience in London. He specialises in structural alterations and conservation area projects, prioritising client satisfaction through reliable service and high-quality craftsmanship.
Questions
What areas do you cover for construction services?
We operate across North and North-West London, including Barnet, Hendon, Mill Hill, Finchley, and Hampstead. Our services extend to conservation areas and Jewish community properties.
Do you handle planning permission for extensions?
Yes, we provide full planning support, including applications for conservation areas and compliance with local authority regulations to ensure smooth project approvals.
Are your tradespeople certified for electrical and gas work?
All gas installations are Gas Safe registered, and electrical work is certified by NICEIC-approved engineers, ensuring full compliance with UK safety standards.
Can you accommodate kosher kitchen requirements?
Yes, we specialise in kosher kitchen layouts with dual sinks and appliance separation, combining traditional requirements with modern design aesthetics.
What insurance coverage do you provide?
We have public liability insurance up to £10 million and employers' liability coverage, ensuring comprehensive protection for all our construction projects.
How do you manage project timelines and communication?
We provide regular updates and maintain clean, respectful work environments. Most projects are completed on time, with daily site cleaning and clear progress tracking.
Videos
Reviews (5)
Alex Iako
Jul 12, 2021 Report
Daniel was involved in doing some structural changes in my home. We took down a major external structural wall and installed new bifold doors. The entire work area was also fully plastered.
Daniel was extremely helpful and professional. His team worked hard to make the changes we requested. He is very knowledgeable in all aspects of the building trade, identifying and remediating unforeseen issues, and also suggesting new ideas which improve the home. I was very happy with the work. I will be using Daniel again for my future projects, which include new kitchen installation, new bathrooms etc
Joseph Petruc
Sep 09, 2019 Report
Rude, swears and shouts and ignores all my calls - after messing up my site! I strongly would never ever recommend this guy - his a con artist - he doesnt know how to speak to people!!
David Morris
Jul 18, 2019 Report
Daniel fitted a new kitchen for us. He was very diligent, and worked hard to ensure the job was completed to a high standard. Daniel's team also re-turfed our garden and fitted a new fence - his team were friendly and hard working. We would certainly recommend Optima Builders.
M. S.
Sep 01, 2018 Report
Daniel built a utility room in our house. He is reliable, hard working and always on time. We highly recommend him.
Marcin Stojak
Oct 18, 2016 Report
Reliable and professional. Daniel completed our bathroom remodelling project on time and on the budget . We are very pleased and can confirm that the entire Optima Builders team was professional, punctual, and hard working.