Cast iron guttering is one of those products where the first price you see is rarely the price of the finished job.
A 1.83m length of 100mm half round gutter might cost around £49 primed or £61 painted, but the roof still needs brackets, outlets, stop ends, joints and downpipes. Then there is installation and, on some properties, scaffolding or other access equipment.
So asking how much cast iron guttering costs per metre is useful, but only if you know exactly what that price includes.
Quick Answer: How Much Is Cast Iron Guttering?
For standard domestic profiles, the straight cast iron gutter itself currently starts at roughly £27–£43 per metre including VAT for common half round and Victorian Ogee sizes.
Larger and more decorative profiles like Victorian Ogee cost considerably more. A 125 x 100mm Moulded Ogee gutter can be around £80–£95 per metre for the straight gutter alone.
Those figures do not include brackets, stop ends, outlets, downpipes, jointing materials, delivery or fitting.
| Cost | Rough 2026 figure | What it actually covers |
|---|---|---|
| Standard half round gutter | Around £27–£41/m | Straight gutter length only |
| Victorian Ogee gutter | Around £33–£43/m | Straight gutter length only |
| Deepflow cast iron gutter | Around £49–£61/m | Straight gutter length only |
| Large Moulded Ogee | Around £80–£95/m | Straight gutter length only |
| Professionally installed cast iron | Roughly £80–£275/m in published UK guides | Varies heavily by what is included |
| Scaffolding/access | Project-specific | Can add hundreds or more to the job |
Current Cast Iron Warehouse straight-gutter prices were checked in August 2026 and include VAT.
Published installation figures vary considerably between UK cost guides, which is why they should only be used for early budgeting rather than treated as a quotation.
Why Cast Iron Guttering Cost Figures Online Vary So Much
Search for cast iron guttering prices and you can find one website quoting £30 per metre and another quoting well over £100.
Both could be talking about completely different things.
There are three prices that regularly get mixed together.
Straight gutter price is simply the cost of the physical gutter length divided by its length in metres.
Complete supply price includes the gutter plus brackets, outlets, stop ends, angles, cast iron downpipes and other components needed to make it work.
Installed price adds labour, removal of the old system, access equipment and sometimes scaffolding.
VAT causes another difference. Trade suppliers often advertise ex-VAT figures, while homeowners naturally want to know what actually leaves their bank account.
The profile also matters far more with genuine cast iron than it does with many plastic systems. A basic 100mm half-round gutter and a large Moulded Ogee section are both cast iron, but they are not remotely the same price.
That is why we wouldn't recommend taking a genhalf-rounderic “£X per metre” figure and multiplying it by the length of your house.
Current Cast Iron Guttering Prices by Profile
The table below uses current prices from Cast Iron Warehouse and shows what the straight gutter sections themselves cost.
All examples are 1.83m (6ft) lengths and include VAT.
| Cast iron gutter profile | Primed 1.83m length | Black 1.83m length | Approx. straight gutter cost per metre |
| 100mm Half Round | £49.14 | £61.02 | £26.85–£33.34 |
| 115mm Half Round | £51.29 | £63.00 | £28.03–£34.43 |
| 125mm Half Round | £60.02 | £74.53 | £32.80–£40.73 |
| 150mm Half Round | £98.27 | £127.03 | £53.70–£69.42 |
| 115mm Victorian Ogee | £60.33 | £74.90 | £32.97–£40.93 |
| 125mm Victorian Ogee | £63.20 | £78.56 | £34.54–£42.93 |
| 125 x 75mm Deep Half Round | £90.41 | £110.89 | £49.40–£60.60 |
| 125 x 100mm Moulded Ogee | £145.62 | £174.29 | £79.57–£95.24 |
Prices checked August 2026. Product prices can change, so use the live collection price before working out a final budget.
The difference between profiles is worth paying attention to.
If you simply need traditional genuine cast iron on a relatively straightforward domestic roofline, plain half round cast iron guttering is generally the cheaper route.
Victorian Ogee costs slightly more but gives the more pronounced period profile many people are looking for on Victorian and other traditional properties.
Larger Moulded Ogee and high-capacity Deepflow sections cost more again. Those profiles should normally be chosen because the building, existing rainwater goods or drainage requirement calls for them, rather than because bigger automatically means better.
If you are unsure about the dimensions, our Cast Iron Guttering Sizes Explained guide covers 100mm, 115mm, 125mm and 150mm systems in more detail.
The Gutter Length Is Only Part of the Bill
This is probably the most important point in the whole cost calculation.
Buying 20 metres of gutter does not give you a 20-metre working rainwater system.
Using the current 100mm black Half Round range as an example:
| Component | Current price including VAT |
| 1.83m Half Round gutter length | £61.02 |
| Fascia bracket | £8.64 |
| Gutter union | £16.81 |
| Stop end | £8.70 |
| 65mm or 75mm gutter outlet | £24.70 |
| 1.83m 65mm round cast iron downpipe | £115.92 |
Current prices checked August 2026.
A straight gutter run therefore needs more than lengths.
Brackets support the weight. Outlets transfer the water into the downpipe. Stop ends close the run. Depending on the profile and jointing arrangement, additional jointing components and sealants may be required.
Then you reach the vertical side of the system.
A downpipe may need straight pipe sections, bends or an offset to bring the pipe back towards the wall, wall fixings and either a shoe or suitable connection at ground level.
This is where seemingly similar houses can have very different material bills.
A simple vertical downpipe beneath an outlet is relatively straightforward. A property with a deep overhanging eaves detail may need a substantial offset. Long cast iron offsets are specialist castings and can cost considerably more than a short bend or straight section. For example, a 765mm projection 65mm cast iron offset is currently priced at £295.56 in black.
So look at the route the water takes from roof to drain, not just the horizontal gutter length.
What Would 20 Metres of Cast Iron Guttering Cost?
A worked example makes the difference clearer.
Because standard gutter sections are 1.83m long, a nominal 20m run would require 11 full lengths, giving 20.13m before any cutting or adjustment.
For the straight gutter lengths alone:
| 20m example | Number of 1.83m lengths | Straight gutter cost |
| 100mm Half Round – Primed | 11 | £540.54 |
| 100mm Half Round – Black | 11 | £671.22 |
| 125mm Half Round – Black | 11 | £819.83 |
| 125mm Victorian Ogee – Black | 11 | £864.16 |
| 125 x 75mm Deep Half Round – Black | 11 | £1,219.79 |
| 125 x 100mm Moulded Ogee – Black | 11 | £1,917.19 |
Again, these are not complete-system prices.
You would still need to account for the appropriate brackets, outlets, stop ends, angles where required, downpipes, pipe fittings, jointing materials and delivery.
That is why a £33-per-metre gutter can turn into a much larger project cost once everything needed to get rainwater safely to ground level is included.
Primed vs Painted Cast Iron: Which Costs Less?
Primed cast iron is cheaper to buy.
That doesn't automatically make it cheaper once fitted.
Factory-primed cast iron is intended to receive its final paint system on site. Alumasc's installation guidance specifies further paint protection for its factory-primed Apex Heritage products, including additional priming, undercoat and gloss coats. Cut edges and other exposed metal also need protecting.
That means you need to budget for paint, preparation and labour.
Pre-painted cast iron costs more on the invoice but reduces the amount of finishing required once the materials arrive. Alumasc states that pre-finished cast iron can reduce costs by 30% and installation time by 60% compared with site finishing.
For a small DIY-accessible job, buying primed sections and painting them yourself may still save money.
For a larger two-storey project where trades and access equipment are already on site, the calculation is different. Saving £10 or £15 on a length can become false economy if someone then has to spend considerably longer preparing and painting the entire system at height.
This is one of those cases where cheapest component price and cheapest finished job are not always the same thing.
Does Gutter Size Affect the Price?
Yes, sometimes substantially.
Using plain Half Round as the simplest example, current black 1.83m lengths rise from £61.02 for 100mm to £127.03 for 150mm.
There is therefore little point oversizing a rainwater system simply because a bigger gutter sounds safer.
The system should be sized around the roof catchment, gutter profile, run length, outlet position and downpipe capacity.
Conversely, buying a smaller profile purely because the sections are cheaper can be a poor saving if the gutter then struggles during heavy rainfall.
For normal domestic projects, 115mm and 125mm cast iron systems are common starting points, but the correct size should come from the actual roof rather than the budget alone.
How Much Does Cast Iron Guttering Cost to Install?
This part is harder to give a single honest number for.
Current UK cost guides vary dramatically. Checkatrade uses approximately £130 per metre for cast iron guttering, Bernard Andrews Roofing gives roughly £80–£150 per metre, while MyBuilder gives a much broader £85–£275 per metre range.
Rather than treating one of those figures as a guaranteed rate, ask what the quote includes.
A proper installation quotation should make clear whether it covers removal of the old guttering, fitting the new gutters, fitting downpipes, jointing materials, disposal, working around difficult roof sections and any access equipment.
Cast iron is also a heavier sectional system that needs to be correctly supported and jointed.
Alumasc's installation guidance generally positions gutter brackets at 915mm centres with additional brackets around gutter joints and angles. Joints are wet sealed and bolted, and downpipes require their own fixing arrangement.
A contractor is therefore doing rather more than simply clipping a lightweight length of plastic gutter onto a fascia.
How Much Does Scaffolding Add?
Not every cast iron gutter installation requires full scaffolding.
Lower rooflines and straightforward properties may be accessible using suitable alternative access equipment. Tall buildings, difficult elevations, conservatories, extensions and restricted areas can change that quickly.
Published UK scaffold estimates also vary. MyJobQuote currently gives around £500 for one wall and around £1,000 for a full house, while MyBuilder gives £250–£650 for full scaffolding within its gutter-installation guide.
Your actual figure depends on the building and location.
The important thing is to identify access before comparing materials. If a £1,000 scaffold is needed regardless of which gutter you buy, saving a relatively small amount on the gutter itself may not change the total project cost as much as expected.
Access is especially important on tall Victorian terraces, townhouses and properties where gutters sit above conservatories or awkward extensions.
Other Costs That Catch Buyers Out
Most budget surprises come from things that were missing from the first material calculation rather than sudden changes in the price of cast iron.
| Extra cost | Why it matters |
| Downpipes | Straight gutter prices do not normally include them |
| Bends and offsets | Complex eaves can require several fittings |
| Cast Iron Hopper heads | Needed on certain roof drainage layouts and often decorative on heritage buildings |
| Gutter angles | Bay windows, returns and complicated rooflines add fittings quickly |
| Additional brackets | Joints, outlets and angles need proper support |
| Jointing materials | Cast iron joints must be correctly sealed and fixed |
| Painting primed goods | Primed cast iron still needs its final protective coating |
| Removing old gutters | Adds labour and disposal to replacement work |
| Fascia repairs | Weak or rotten fascia may not safely support a new system |
| Scaffolding/access | Often one of the biggest variables on a two or three-storey property |
| Bespoke components | Radius gutters, unusual hoppers and non-standard profiles cost more |
A quote that looks expensive at first can sometimes simply include more of the job.
Likewise, a cheap supply quotation may look less attractive once downpipes, fittings, paint, delivery and access are added afterwards.
Compare like for like.
A cast iron hopper on a listed building
What About Listed Buildings?
Cost isn't the only consideration if the property is listed.
Historic England's guidance says that replacement of a cast iron gutter with cast iron may not require Listed Building Consent where the work is genuinely like-for-like. Changing the material, profile or other significant details can be a different matter.
That makes measuring and identifying the existing rainwater system particularly important.
Do not order the cheapest standard Half Round system if the building currently has an Ogee, moulded or otherwise distinctive original profile without checking what needs to be retained.
Matching it properly the first time is normally cheaper than ordering an unsuitable system and dealing with the consequences later.
How to Work Out Your Cast Iron Guttering Budget
You can get much closer to the real supply cost before requesting a quote if you work through the job in the right order.
- Measure each gutter run in metres. Divide the total by 1.83 to work out the approximate number of standard lengths, then round up rather than down.
- Identify the profile and size. Check whether you need Half Round, Victorian Ogee, Beaded Half Round, Moulded Ogee or Deepflow. If replacing old cast iron, do not rely on width alone.
- Count the fittings. Note every stop end, outlet, internal angle, external angle and other change in direction.
- Work out the bracket arrangement. The fixing method depends on the building. Fascia, top-fix rafter, side-fix rafter and rise-and-fall brackets are not interchangeable in every situation.
- Measure the downpipes separately. Check the vertical drop as well as the projection between the gutter outlet and wall. That determines the bends or offsets required.
- Choose primed or pre-painted. Compare the finished cost, not only the difference in product price.
- Add installation and access separately. This makes it much easier to understand why one contractor's quote differs from another.
For replacement work, photographs of the existing gutter profile, brackets, outlets and downpipes can also save a lot of guesswork.
Is Cast Iron Guttering Expensive Compared With Other Materials?
Yes, the upfront price is higher than basic plastic guttering.
That isn't something worth disguising.
The better question is whether cast iron suits the property and how long you intend the system to remain there.
Alumasc gives its Apex Heritage cast iron system a life expectancy in excess of 40 years, provided the system is correctly installed and maintained. It is also designed specifically around traditional gutter and downpipe profiles rather than simply imitating their appearance.
For a modern garage or inexpensive outbuilding, that extra spend may be difficult to justify.
For a period house where genuine cast iron suits the architecture, or a heritage project where the original material and profile matter, the argument is rather different.
We've looked at that decision separately in our Is Cast Iron Guttering Worth It? guide rather than turning a cost article into a sales pitch.
Where Can You Save Money Without Buying the Wrong System?
The easiest saving is usually specification, not cutting corners.
A straightforward Half Round profile costs much less than a large Moulded Ogee. If Half Round is correct for the building and drainage requirement, there is no benefit in paying for a more expensive profile.
Primed guttering can reduce the material bill where you already have the time, equipment and ability to paint it properly.
Keeping the downpipe route simple can also help. Large offsets, awkward bends and decorative fittings can add surprisingly large amounts to the system price.
Measure carefully before ordering too. Cast iron is not the material you want to over-order heavily “just in case”, nor do you want to discover halfway through installation that the old Ogee profile doesn't match the new components.
Saving money by undersizing the system, reducing necessary bracket support or ignoring the existing profile isn't a saving we'd recommend.
FAQs
How much is cast iron guttering per metre in the UK?
For the straight gutter section alone, current standard domestic cast iron profiles are roughly £27–£43 per metre including VAT for common Half Round and Victorian Ogee sizes. Larger profiles can exceed £60 or even £90 per metre. A complete system costs more because brackets, outlets, stop ends, downpipes, fittings and installation are additional.
How much does it cost to replace cast iron guttering on a house?
There is no reliable fixed house price without knowing the gutter length, number of downpipes, profile and access. A full two-storey replacement can easily run into several thousand pounds once materials, labour and scaffolding are included. Get a measured material schedule first, then compare installation quotations based on the same specification.
Is primed cast iron guttering cheaper than painted?
Primed cast iron normally costs less to purchase, but it still needs a suitable paint system applied on site. Pre-painted cast iron costs more upfront but removes much of that finishing work. For larger professionally installed jobs, the painted option can make financial sense because labour and time on access equipment also have a cost.
Does cast iron guttering need scaffolding to install?
Not always. Straightforward lower rooflines may be accessible using suitable ladders, towers or other access equipment depending on the work and site conditions. Taller buildings, difficult elevations and gutters above conservatories or extensions may require scaffolding. Access should be assessed before work begins rather than assumed from the gutter material alone.
Why is Victorian Ogee guttering more expensive than Half Round?
Victorian Ogee has a more decorative profile and is commonly used where the architecture or existing rainwater system calls for that shape. Current standard Victorian Ogee prices are only moderately above comparable Half Round sizes, while more substantial profiles such as Moulded Ogee can cost considerably more because of their larger, more involved cast sections.
Can I replace just part of an old cast iron gutter system?
Often, yes, provided the existing profile and dimensions can be matched and the remaining system is sound. Older cast iron systems do not always correspond exactly with current standard sizes, though. Measure the full profile and check the joint, outlet and bracket arrangement before ordering a replacement section purely from its nominal width.
Getting a More Accurate Cast Iron Guttering Cost
The most useful way to price cast iron guttering is to stop thinking about one headline cost per metre.
Start with the gutter profile and size. Measure the runs. Count the angles, outlets and stop ends. Work out the downpipe routes. Decide between primed and painted, then add the real cost of installation and access.
For a straightforward domestic installation, Half Round or Victorian Ogee cast iron can be noticeably less expensive than many generic online cost figures suggest at supply level. The price climbs once the whole rainwater system is included, especially where a property needs several downpipes, large offsets, complex corners or scaffolding.
If budget matters, choose the simplest profile that is genuinely right for the property rather than simply the cheapest piece in the catalogue. On an older building, getting the profile, size and fittings right the first time will usually save more than shaving a few pounds from the initial order.
That is the figure that matters when working out the true cast iron guttering cost in the UK.