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A guide to LPG heating.
Off-grid LPG central heating — tank options, fuel cost in 2026, and when LPG beats oil or heat-pump.
✓ Updated May 2026✓ Free quotes✓ Vetted pros
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Four moves that separate a smooth job from a nightmare.
Tank rental lock-in
Rented tanks tie you to that supplier. Owned tank gives competitive shop-around.
Running out of fuel
Forgetting to monitor levels causes mid-winter outages. Auto-reorder or smart tank monitoring.
Higher fuel cost than mains gas
LPG typically 40–80% more expensive per kWh than mains gas. Worth shopping suppliers annually.
Limited brand range
Fewer LPG boiler models than gas. Worcester Bosch and Vaillant the main choices.
Costs & timeline
Know what it costs. Know when it ends.
Indicative UK ranges and what affects price.
Cost range
By job type
Inc. VAT · 2026
Source: NMT quotes
Source: NMT quotes
LPG combi boiler installationWorcester Bosch, Vaillant LPG
£2.5k–£4.5k
LPG system boiler installationPlus cylinder
£3k–£5.5k
LPG tank rental (Calor, Flogas)Per year
£1–£120
LPG tank purchaseOwn outright
£2k–£4k
Tank install labourPlinth, plumbing, fire protection
£500–£1.5k
Annual LPG cost (3-bed home)Varies with prices
£1.5k–£3k
!
Quote spread is typically ± 18% — always get 3 quotes.
At a glance
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LPG (liquid petroleum gas) heating powers UK homes without mains gas — typically rural properties. Expect to pay £3,500–£7,500 for a UK LPG boiler installation. Fuel cost between oil and mains gas; install cost similar to gas.
What Does the Work Involve?
Gas Safe registered engineer (LPG endorsement). LPG tank installed outside — typically rented from supplier (Calor, Flogas), with clearances from buildings and boundaries similar to oil tanks. LPG boiler is virtually identical to natural gas boiler — different burner orifice. Installation same as gas. Fuel delivered by tanker every 1–2 months in winter.
Typical Costs
| Item | Low (£) | High (£) | Notes |
|---|---|---|---|
| LPG combi boiler installation | 2,500 | 4,500 | Worcester Bosch, Vaillant LPG |
| LPG system boiler installation | 3,000 | 5,500 | Plus cylinder |
| LPG tank rental (Calor, Flogas) | 0 | 120 | Per year |
| LPG tank purchase | 2,000 | 4,000 | Own outright |
| Tank install labour | 500 | 1,500 | Plinth, plumbing, fire protection |
| Annual LPG cost (3-bed home) | 1,500 | 3,000 | Varies with prices |
| Boiler service annual | 120 | 250 | Similar to gas |
How Long Does It Take?
Full LPG system install: 3–5 days. Boiler-only swap: 1–2 days. Tank install: 1 day.
DIY or Professional?
Gas Safe registered with LPG endorsement only.
Choosing the Right Tradesperson
Gas Safe LPG-endorsed. Calor Gas Approved Installer or Flogas equivalent for tank rental. Boiler brand same as gas (Worcester Bosch, Vaillant, Baxi all do LPG variants).
UK Regulations
Gas Safety regulations. Tank positioning rules from supplier (Calor TIS, Flogas equivalent). Building Regs Part L (efficiency), Part J (combustion safety).
Common Problems
- Tank rental lock-in: Rented tanks tie you to that supplier. Owned tank gives competitive shop-around.
- Running out of fuel: Forgetting to monitor levels causes mid-winter outages. Auto-reorder or smart tank monitoring.
- Higher fuel cost than mains gas: LPG typically 40–80% more expensive per kWh than mains gas. Worth shopping suppliers annually.
- Limited brand range: Fewer LPG boiler models than gas. Worcester Bosch and Vaillant the main choices.
Frequently Asked Questions
LPG vs oil heating?
LPG: cleaner combustion (lower carbon), slightly more expensive fuel. Oil: cheaper fuel but higher carbon. LPG is preferred in some rural locations where oil delivery is harder.
Should I switch from LPG to heat pump?
If you can take BUS grant (£7,500): yes — heat pump is much cheaper long-term in well-insulated home. LPG fuel cost increasing year-on-year.
Tank rental or buy?
Rental: no upfront cost, locked to one supplier, supplier maintains. Buy: shop suppliers competitively, manage maintenance. Long-term: buying saves money but requires upfront £2,000–£4,000.
How big a tank do I need?
3-bed home: 1,200L (above-ground bullet) or 1,500L (underground). 4-bed: 2,000L. Determines refill frequency.
Boiler brand choice for LPG?
Worcester Bosch Greenstar LPG and Vaillant ecoTEC LPG are the main UK choices. Both 10-year warranty available.
Are there grants for LPG?
No — current UK grant schemes (ECO4, BUS) favour heat pump conversion away from LPG and oil. Plan accordingly.
This guide was written with AI assistance and is intended for general information only. Prices are estimates based on UK averages and may vary by region. Always get at least three quotes and consult a qualified professional before starting any work.
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