Gas Pipe Installation Cost
£300–£800
typical UK range
Updated
Installing a new gas pipe in the UK costs £300–£800 for most domestic applications — running a new gas supply to a boiler, a gas hob, or an outbuilding. More complex installations with longer runs or concealed pipework cost more.
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How much does each option cost?
| Type / scope | Typical cost | Notes |
|---|---|---|
| Short gas pipe run (up to 5 metres, accessible)Running a new gas supply point — for a new hob location, gas fire, or additional appliance point. Copper pipe, surface-mounted | £150–£300 | Running a new gas supply point — for a new hob location, gas fire, or additional appliance point. Copper pipe, surface-mounted |
| Medium run (5–15 metres, mostly surface)Extending a gas supply across a room or through a doorway. Includes all fittings, isolation valve, and tightness test | £300–£600 | Extending a gas supply across a room or through a doorway. Includes all fittings, isolation valve, and tightness test |
| Longer or concealed run (15+ metres or through joists/walls)Longer runs or pipework routed through structural elements. Notching joists, threading through walls, or below-floor work adds significant time | £500–£1,000 | Longer runs or pipework routed through structural elements. Notching joists, threading through walls, or below-floor work adds significant time |
| Gas supply to outbuildingRunning gas to a garage, workshop, or garden building — typically requires CSST (corrugated stainless steel) or MDPE underground pipework and a separate supply point | £400–£1,200 | Running gas to a garage, workshop, or garden building — typically requires CSST (corrugated stainless steel) or MDPE underground pipework and a separate supply point |
| Tightness test and commissioningRequired after any new pipework installation. May be included in the installation quote or charged separately | £80–£150 | Required after any new pipework installation. May be included in the installation quote or charged separately |
| MDPE underground gas pipe (per metre)Underground plastic gas pipe for external runs (e.g. to an outbuilding). Cost per metre plus excavation, bedding material, and reinstatement | £30–£80 | Underground plastic gas pipe for external runs (e.g. to an outbuilding). Cost per metre plus excavation, bedding material, and reinstatement |
What affects the price?
- Length of the pipe run — each additional metre of pipework adds materials and labour cost. Surface-mounted runs cost less than concealed or underground work
- Access difficulty — pipework that requires routing through joists, walls, or floors takes significantly longer than a straightforward surface-mounted run
- Type of pipework — copper (most common domestic), CSST (flexible corrugated steel, used in some applications), or MDPE (yellow plastic pipe for underground external runs)
- Pressure requirements — domestic work is typically at low pressure (21 mbar for natural gas). Medium-pressure work requires different materials and procedures
- Number of connection points — adding isolation valves, unions, tees, and other fittings increases materials cost
- Whether gas supply needs upgrading — if the existing gas meter or service pipe is undersized for the additional load, a network operator upgrade may be required (separate cost)
- Location — London and South East rates are 20–40% above national average
What's included in the price?
- All copper or other appropriate pipework
- All fittings (joints, elbows, tees, reducers)
- Isolation valves at each new supply point
- Gas tightness test on completion
- Purging and reconnection of appliances
- Building Regulations compliance notification (if applicable for the work scope)
- Any required brackets, clips, and pipe supports
How long does it take?
A short gas pipe run (up to 5 metres, surface-mounted) takes 1–2 hours including a tightness test. A medium run through a property (10–15 metres, some routing through walls or joists) takes 2–4 hours. An underground run to an outbuilding requires excavation and is typically a half-day to full-day job. All gas pipe installations must be followed by a tightness test before gas is restored — add 30–60 minutes for this.
Do I need one?
You need a new gas pipe installation when adding a new gas appliance in a location without an existing gas supply (e.g. a new kitchen island with a gas hob, a gas range cooker in a new position, a gas fire in a room without a gas supply, or gas to an outbuilding or extension). You also need a gas pipe extension when converting from electric to gas cooking, when adding gas underfloor heating, or when extending into a new area of the property. Gas pipework must only be installed by a Gas Safe registered engineer.
How do you avoid overpaying?
- Plan your layout before getting a quote — knowing exactly where each gas appliance will go allows the engineer to design the most efficient pipework run
- Combine pipe installation with other gas work (boiler replacement, appliance installation) — the engineer's visit cost is shared across both jobs
- Specify surface-mounted pipework where aesthetics allow — concealing pipework in walls or under floors adds labour cost that may not be worth it in less visible areas
- Get quotes from 3 Gas Safe registered engineers — gas pipe installation pricing varies significantly between contractors
- Ensure the floor or wall access you need is prepared before the engineer arrives — time spent clearing access or moving furniture is billable
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Frequently asked questions
We’re happy to answer all your questions.
Can I install my own gas pipe?
No. All gas pipe installation, modification, and repair must be carried out by a Gas Safe registered engineer. It is illegal for an unregistered person to carry out gas work. Attempting DIY gas pipework is dangerous and will invalidate your buildings insurance.
What type of pipe is used for gas?
Copper pipe is the most common material for internal domestic gas pipework. CSST (corrugated stainless steel) is used in some applications. Yellow MDPE plastic pipe is used for underground external runs (e.g. to an outbuilding). Steel pipe may be found in older properties.
Do I need planning permission for a gas pipe?
Internal gas pipework doesn't require planning permission. Underground external pipework to an outbuilding doesn't typically require planning permission either, but you should notify your local authority if the outbuilding itself requires permission. The gas work itself is notifiable under Building Regulations.
How do I get gas to my outbuilding?
A Gas Safe engineer installs a MDPE underground gas pipe from your main supply to the outbuilding, typically running it through a trench at the required depth. The work includes a new isolation valve, tightness test, and commissioning. Cost is typically £400–£1,200 depending on the distance and any excavation required.
Can I run a gas pipe to a garden kitchen?
Yes — Gas Safe registered engineers can run a dedicated gas supply to an external kitchen or barbecue area. MDPE underground pipework is used for the external run, with appropriate isolation and connection points at the end. Ensure the outdoor appliances used are rated for outdoor use.
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