Fixington

Oil Boiler Installation

Trade: Heating Engineer

⭐ Introduction

An oil boiler installation involves fitting a new central heating boiler powered by heating oil, rather than mains gas or electric. This is most common in rural or off-grid UK homes where gas isn’t available.

You might need a new oil boiler if your current one is old, inefficient, broken beyond repair, or if you’re switching from another fuel type to oil. Installing a modern oil boiler can improve heating efficiency, reduce fuel bills, and provide reliable warmth during cold months.

🔧 What the job involves

Installing an oil boiler means the heating engineer will fit the boiler unit itself plus any linked components like the oil storage tank, pipework, controls, and flue.

Key points:

  • If it’s a first-time oil boiler installation, an external oil tank will be sited safely outside your home, often in the garden or beside the house.
  • New pipework will connect the oil tank to the boiler and the boiler to your central heating system (radiators, hot water cylinder etc).
  • The engineer will also install a flue (vent pipe) to safely discharge boiler gases outside, in line with Building Regulations.
  • Controls like a thermostat and programmer will be set up to help you manage heating times and temperature.
  • The system must be pressure-tested, checked for leaks, and certified as safe.
  • Finally, a full handover explains how to use and maintain your new boiler.

📝 Step-by-step from booking to completion

  1. Initial enquiry: Contact a qualified heating engineer (preferably OFTEC registered, the specialist body for oil heating) for a consultation.
  2. Survey and quote: The engineer visits to understand your needs, inspect your property, assess the site for oil tank and flue, and measure pipe runs.
  3. Receive written quote: You get a clear, itemised estimate including parts, labour, and any removal/disposal fees.
  4. Agree installation date: Book a convenient time for the works to be done.
  5. Pre-installation prep: Clear access areas and ensure outdoor tank site is ready if needed.
  6. Installation day: Engineer installs boiler, oil tank, pipework, flue, and controls. System is tested and commissioned.
  7. Certification and paperwork: You receive certificates confirming compliance with OFTEC, Building Regulations, and any other legal standards.
  8. Demonstration: Engineer explains operation, safety features, and maintenance advice.
  9. Post-install review: Keep contact details for any questions or servicing.

💷 Main costs to expect

  • Labour: Heating engineer’s time for installation (typically 1–3 days depending on complexity).
  • Boiler unit: Modern oil boilers vary but expect £1,000–£2,000+ depending on size and efficiency.
  • Oil tank: New tanks can cost from £300 to £1,000 depending on capacity and style (above or below ground).
  • Pipework and fittings: Copper pipe, valves, controls, flue pipe, insulation materials.
  • Disposal: Removal of old boiler and oil tank if applicable, plus safe disposal of hazardous materials.
  • Certification: OFTEC registration of work, Building Regulations compliance certificates (may be included in labour costs).

An example quote might include:

  • Boiler: £1,500
  • Oil tank: £600
  • Labour and pipework: £1,200
  • Flue and controls: £400
  • Disposal and certification: £300
  • Total: £4,000 (approximate)

📊 What affects the price

  • Property access and complexity (tight or awkward spaces take longer)
  • Type and size of oil tank required (capacity and siting)
  • Condition of existing pipework and whether it needs upgrading
  • Complexity of boiler controls or integration with existing heating systems
  • Need for remedial works like new chimney liners or repairing walls
  • Location (rural or hard-to-reach areas may add travel costs)
  • Timescale and availability of engineers
  • Compliance with latest Building Regulations and OFTEC standards, especially where flues or oil storage are involved

⏱ How long does it take?

  • Straight swap/replacement: Typically 1 to 2 days if replacing an old oil boiler on the same pipework with no major changes.
  • New installation: 2 to 4 days if installing a new tank and flue, plus fresh pipe runs and controls.
  • Highly complex or larger systems can take longer, especially if extensive building works or remedial repairs are required.

🏠 Can you DIY it?

Installing an oil boiler is not a DIY job. It requires specialist training, understanding of fuel oil safety, plumbing, heating controls, and Building Regulations compliance.

Important points:

  • OFTEC registration is required for oil boiler installation engineers—it’s illegal and unsafe to install oil appliances without correct qualifications.
  • Incorrect installation can cause leaks, dangerous fumes, or inefficient heating.
  • Boiler flues need to be installed with care to avoid carbon monoxide risks.
  • Certification is mandatory for insurance and legal purposes.

Leave oil boiler installation and subsequent servicing to qualified professionals only.

💰 Typical UK price range

For a typical oil boiler installation including a new boiler, external oil tank, pipework and necessary certification in the UK, expect around:

£3,500 to £5,500 + VAT (where applicable)

This is an estimate only; final prices vary by region, property specifics, and chosen equipment.

✅ Handy tips before you start

  • Check your current boiler’s age and condition as older boilers over 15 years are often less efficient and may not be worth repairing.
  • If you have an existing oil tank, get it inspected for leaks or corrosion before installation.
  • Consider modern, more efficient boilers with good energy ratings to save on fuel costs.
  • Arrange space and clear access for the installer, especially around the boiler and where the oil tank will go.
  • Keep all paperwork, including installation certificates and manufacturer’s warranty, safe; you’ll need these for insurance and future servicing.
  • Book regular servicing with a qualified OFTEC engineer to keep your system safe and efficient.
  • If your property is in a conservation area or listed, check with your local council about any planning or Listed Building consent related to new flues or external tanks.

By understanding what’s involved and planning carefully, you can ensure a smooth oil boiler installation that keeps your home warm, safe, and efficient for years to come.