The quick way to find a local Oil-Fired Boiler specialist in Welwyn

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Loft conversion specialist, with 25 years worth of experience.

We Heat London LTD

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We Heat London is a trusted London heating company specialising in boiler installations, repairs and servicing. Our experienced Gas Safe registered engineers provide reliable heating solutions across London, from new energy-efficient boiler installations and system upgrades to boiler breakdowns, servicing and gas safety checks. We pride ourselves on honest advice, professional workmanship and excellent customer service. Whether you need a new boiler, heating system upgrade, unvented cylinder or help getting your heating back up and running, our team is here to help. Keeping London Warm.

Build To Precision

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Build to Precision Group brings over 20 years of experience in the construction industry, delivering high-quality workmanship across residential and commercial projects. Building on this solid foundation, we have recently expanded into a dedicated maintenance division, offering reliable, efficient, and professional property maintenance services to meet our clients’ ongoing needs.

Octopus Builders LTD

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At OCTOPUSBUILDERSLIMITED, we pride ourselves on our extensive 16 years of experience in the construction industry. Our dedicated team works collaboratively to handle every aspect of your building project from A to Z. Whether it’s residential or commercial, we ensure quality craftsmanship and excellence in every job. Let us turn your vision into reality!

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Reviewed by NORMAN on 1/10/2024

Great job and would definitely rate it higher if I could. Will keep in mind if I need other jobs done around the house.

Marross limited

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We have been established since 1999 and have offices in St Albans & St Neots. All engineers are highly Qualified with many years of experience. We offer a reliable and professional service covering all types of Plumbing & Heating works.

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Reviewed by nick on 2/5/2019

Excellent service... No fuss and gave great advice post job

AYG Construction Ltd

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I highly recommend AYG Construction , very good job quickly done very reasonable quote, thanks to Adrian for his hard work. Finished double storey extension on time and very helpful throughout.Excellent quality and price. Welcome back any time. Thank you!

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Reviewed by Mark on 20/1/2016

Adrian and his team met or exceeded my expectations, always willing to match my needs and finished the job on time and within budget.

TJF Plumbing and Heating

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Welcome to my page and thank you for taking the time to have a look into my details. My company TJF Plumbing and Heating was established in 2016 after deciding to go out on my own. I have over 10 years’ experience in the trade. I am a conscientious tradesmen and I take pride in my work, I work my company by the quote: “there is only one way to do a job, the right way” and my aim is to ensure a 100% customer satisfaction. I believe in quality of work and we will always aim to deliver the best possible job. You can be rest assured that you are in good hands with my services, I offer quality advice and services. My services include:

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Reviewed by Yvonne on 24/7/2023

AKONI CONSTRUCTION LTD

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Akoni Construction Ltd Building with Quality, Trust, and Experience Akoni Construction Ltd is a professional, multi-trade building company committed to delivering exceptional workmanship while providing complete peace of mind throughout every stage of a project. Our focus is simple: to ensure every client feels valued, understood, and confident from initial consultation through to final handover. We take pride in turning ideas into reality, delivering each project to the highest possible standard with precision and care. ⸻ Our Experience With over 20 years of industry experience, we have built a strong reputation for delivering high-quality construction projects across a wide range of sectors. Our portfolio includes: * Large-scale renovations * Extensions and structural works * Full property developments Today, Akoni Construction Ltd offers a complete, end-to-end building solution—managing every trade under one roof for a seamless and efficient client experience. ⸻ Our Services We provide a comprehensive range of construction services, including: * Full property renovations and refurbishments * Extensions and structural alterations * Bathroom and kitchen design & installation * Plumbing and heating systems * Electrical installations * Carpentry and bespoke joinery * Plastering and decorating * Roofing and external works All works are carried out by fully qualified, highly experienced tradespeople, ensuring consistent quality across every aspect of the build. ⸻ Our Approach We believe that successful projects are built on strong communication and collaboration. From the outset, we work closely with our clients to understand their vision, offering clear guidance, transparent pricing, and professional support at every stage. We also partner with trusted architects, designers, and structural engineers, enabling us to deliver a fully managed, stress-free service—from concept through to completion. ⸻ Our Commitment At Akoni Construction Ltd, we are dedicated to delivering: * Outstanding quality workmanship * Reliable and professional service * Clear, honest communication * Projects delivered on time and within budget We don’t just aim to meet expectations—we aim to exceed them, leaving every client confident in both the journey and the finished result. ⸻ Akoni Construction Ltd Delivering excellence in every build.

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Reviewed by Martin on 7/2/2026

URBAN MODERN HOMES LTD

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We are a team of highly skilled individuals, with a great sense of professionalism and integrity. Our purpose is to deliver the transition from our customer's vision to reality and strive to bring satisfaction and joy with the results of our work. We aim to offer the best possible service while building trust with our clients. Having over a decade experience in the building industry, gives us the possibility to be quick, flexible and efficient.

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Reviewed by Zillionz on 2/5/2024

PHP Services

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PHP Services has provided plumbing and heating services in houses like yours for over 20 years. Our family-run business provides complete services, from essential to comprehensive property care. For example, do you need your boiler replaced, a dripping tap repaired, or a complete bathroom refurbishment? Our staff are Gas Safe and OFTEC registered, and we are registered with the CIPHE. Our efficient office staff will send the correct operative or team to complete your work. Our friendly team are waiting to meet you!

JTS PLUMBING HEATING LTD

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JTS Plumbing and Heating are a family run business based in Cheshunt Hertfordshire. We have a small team of experienced plumbing & heating engineers. Covering all aspects of plumbing and heating, such as: · Full heating systems installation and repairs · Boiler installations · Boiler services · Gas Safety Checks · Bathrooms · Kitchens etc. At JTS we provide the best service available and have built up great relationships with clients and companies. Fully GAS SAFE Registered and insured. Will cover most areas within the M25.

CITY BUILDERS AND PLUMBER LTD

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We are experienced and specialise in general plumbing & heating and building work within the district of London and surround areas. Boiler installation and service Heat Pump Installation & services Bathroom refurbishments Extension Kitchen installation Full decoration And renovation and more! We install, maintain, repair pipes, cooling, water distribution and sanitation systems. Some of the Services we do: . Extension . Bathroom renovation . Decoration . Property Maintenance • Blocked Baths, Sinks and Toilets • General Plumbing, Tap, Pipe Fitter and Repairs • Power Flushing • Radiators / Valves / Thermostats Installed / Replaced • Shower and Bath Installation and Repair • Water Leak Detection • Water Mains Specialist (Pipe Replacement, Moiling and Lead Pipes) • Water Pumps • Water Supply Pipe Repairs • Standard and disabled Bathroom and shower fitting. . Emergency call out 24_7.

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Reviewed by paul on 4/6/2025

Communication, polite manner, consideration and protection of my property in moving equipment in and out and doing the job, of course did the job well, cleaned up . I would hire this company again

JRD Heating

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Here at JRD HEATING we are professional, tidy and efficient. We are available 24 hours 7 days a week. We are always one phone call away from assisting with any issues. Weather it be a tap washer or a full central heating system being installed. There’s no job to big or too small! With over 10 years in the industry we are always one step ahead of any issues!

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Reviewed by Nick on 16/6/2026

Jordan attended and helped resolve my plumbing issue

London & Home Counties Alliance

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Established over 80 years ago London Builders are FMB & NHBC registered & operate in Greater London providing a comprehensive range of services for residential properties from design and construction through to refurbishment, repairs & re-decoration.

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Reviewed by Brian on 24/4/2017

They were really professional compared to the other builders that came and contacted me. The Project Manager was also on hand to answer any questions I had and offered me adviced on how best to move forward. We ended up refurbishing our entire bathroom which is looking great now. I would highly recommend London Builders.

K Marsh Plumbing & Heating LTD

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K Marsh Plumbing & Heating Ltd is a professional plumbing and heating contractor operating across London and the surrounding areas, delivering high standard installations, upgrades and maintenance services to both domestic and commercial clients. We specialise in boiler installations, full central heating systems, unvented hot water cylinders, plant room works and high quality plumbing installations. Our approach is structured, compliant and detail focused, ensuring all works are completed safely, efficiently and in accordance with current regulations. We are fully Gas Safe registered and G3 qualified for unvented hot water systems. All installations are carried out in line with manufacturer specifications and current Building Regulations, with the appropriate certification issued upon completion. Our core services include: Boiler installations and system upgrades Boiler breakdown diagnostics and servicing Full central heating design and installation Unvented cylinder installation and maintenance Hot and cold water system upgrades Leak detection and remedial works Bathroom plumbing installations Underfloor heating systems Commercial heating and plant room works We operate with a clear and professional process from initial enquiry through to completion. Site surveys are conducted where required to ensure accurate scoping, correct appliance sizing and full compliance. Written quotations are provided detailing the scope of works, materials, warranties and timescales, ensuring complete transparency. On site, we take pride in protecting client properties, maintaining clean working environments and delivering workmanship that reflects the standards expected of a professional contractor. All systems are fully tested, commissioned and demonstrated to the client prior to handover. Our reputation is built on reliability, technical knowledge and long term client relationships. A significant proportion of our work comes from repeat clients, landlords, managing agents and referrals, reflecting the confidence our customers place in our service. K Marsh Plumbing & Heating Ltd is committed to delivering compliant, high quality plumbing and heating solutions with clear communication and dependable results.

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Reviewed by William on 30/3/2026

MSM Plumbing & Heating

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Welcome to MSM Plumbing & Heating Your trusted experts for all plumbing, heating and maintenance needs. We deliver quality services with reliability and professionalism. Whether it’s installation, repair, or routine maintenance, we’re here to keep your home or business running smoothly.

BPSC LIMITED

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Hi, My name is Stefan and I would like to say Welcome on behalf of my team from BPSC ltd. I have more than 20 years experience in the plumbing, gas and drainage industry. At BPSC ltd we offer a highly efficient, professional service. Plumbing is the core service that we have been offering for over 20 years with an established reputation for quality, service and customer satisfaction. All our engineers are fully qualified and we are keeping up to date with the new technology to be able to cover all aspects of domestic and commercial plumbing, heating and gas. At BPSC ltd we are Vaillant, Viessmann and Glow Worm accredited installers and can offer between 2 and 10 years warranty depending on the make and model of the boiler

Young Gas And Oil LTD

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Young Gas & Oil Ltd are a family run business with 35 years experience in the industry. We undertake all kinds of Gas, Oil and Plumbing Services. From routine tasks to major installations and repairs and are Worcester Bosch Accredited installer.

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Reviewed by damanjeet on 21/3/2026