By the UK Home Forge — The British Blacksmith's Buying Guide Team · Updated June 2026 · Independent, reader-supported

Gas Forge vs Coal Forge for Home Use UK: Which Should You Buy?

Choosing between gas and coal for your home forge is one of the first decisions you'll make as a hobby blacksmith. Both fuel types work well for metalworking, but they suit different setups and skill levels. Your garden size, local regulations, budget, and what you want to forge will all influence which is right for you.

Initial Cost and Value

Gas forges typically cost more upfront. A decent hobby-grade propane forge runs £400–£1,200 depending on size and quality. You'll also need a regulator, hose, and safety fittings—another £100–£200. A basic coal forge, by contrast, costs £300–£700 new, or significantly less if you build one from a brake drum or cast-iron block.

If you're on a tight budget and willing to DIY, a coal forge is the more affordable entry point. But gas forges hold their value better and are easier to resell if you decide blacksmithing isn't for you.

Fuel Availability Across the UK

Propane is widely available in the UK. You can refill bottles at most garden centres, hardware stores, and specialist propane suppliers. Expect to pay £8–£15 per refill on a standard 13 kg bottle. A bottle lasts several months of casual use, so running costs are predictable and low.

Coal is trickier. Blacksmith-grade coal (anthracite or semi-anthracite) isn't stocked everywhere. You'll need to order from specialist suppliers, often in bags of 25 kg or more. Prices range from £20–£40 per bag depending on grade and delivery distance. If you're in rural Wales, Scotland, or Northern England, sourcing coal is easier; in the South East or Midlands, you may face postage costs that eat into savings. Some regions have local coal merchants still operating—worth checking before committing.

Noise and Neighbour Relations

This matters if you're forging in a suburban garden. Coal forges are louder, especially when you're working steel. The hammer strikes ring out clearly, and the coal fire itself crackles and hisses. Your neighbours will hear you.

Gas forges are quieter. The burner produces a low roar (similar to a garden heater), but it's steady background noise rather than sharp clangs. If your garden is semi-detached or close to other properties, gas is the more neighbourly option.

UK Safety Regulations and Garden Rules

This is where geography matters. England, Scotland, Wales, and Northern Ireland all have different building regulations for structures and equipment in gardens.

A coal forge is essentially a fire pit with metalworking intent. Most local authorities treat small hobby coal forges as exempt from planning control if they're temporary or small-scale, but you should contact your local planning officer to confirm. Some councils require you to notify them; others simply want you to follow basic fire safety (clearance from buildings, fencing, etc.). Insurance can be tricky—some home and contents policies exclude "commercial" blacksmithing, even hobby work. Clarify with your insurer before you start.

Gas forges fall into a similar grey area. A small propane forge used occasionally is unlikely to need planning permission, but a large, permanent structure might. Again, check locally. The advantage: propane forges are less fire-prone than coal, so insurers are often more relaxed about them.

Both fuels require common sense fire precautions: clear ground around the forge, a bucket of water or extinguisher nearby, and keeping the forge away from fences, sheds, and overhanging branches.

Garage vs Garden: Which Fuel Works Where?

In a garage: Gas is the better choice. Propane burns cleanly and produces less ash and spark. Ventilation is simpler—you need a vent or open door, but no special extraction. Coal in a garage is a last resort. Coal smoke is thick and acrid; it stains walls, clogs air filters, and makes neighbours hostile. If your only option is an enclosed space, gas wins easily.

In a garden: Either works, but with caveats. A coal forge needs more space (at least 2–3 metres clearance from structures) and better drainage to handle ash and spilt water. A gas forge is more compact and creates less mess. Wind is your enemy with both—cold wind kills propane efficiency and disrupts coal combustion—but a simple windbreak helps more with coal.

Heat Control and Ease of Use

Gas forges are simpler to learn on. You turn the burner up or down; temperature adjusts in seconds. Consistency is easier to maintain, which is why many beginners and intermediate smiths prefer them.

Coal forges need more skill. You must manage air flow, coal depth, and positioning of your work. They heat slower and unevenly. But many smiths find this learning curve rewarding—coal forging feels more traditional and gives you finer control once you've learned the rhythm.

What to Choose

Pick gas if:

• Your garden is small or semi-detached
• You want minimal setup and fast results
• Fuel availability near you is good
• You plan to forge in a garage or enclosed space
• You prefer lower noise

Pick coal if:

• You have space and your neighbours are distant
• You're on a tight initial budget
• You can source coal locally
• You enjoy the tradition and learning curve
• You want to forge outdoors

Most UK home blacksmiths start with gas for its simplicity, then add a coal forge later once they've found their style. Neither is "wrong"—it depends on your space, budget, and what appeals to you.