iRobot
iRobot Roomba Combo j9+ Robot Vacuum — Prices & Offers
Data last updated: · 2 offers tracked
Lowest price
£363.70
at eBay
Prices are a snapshot from our tracked retailer feeds, not a live price check — always confirm the current price and stock before buying.
eBay
Captured
u-buy.co.uk
Captured
£465.00
View deal
How much does the iRobot Roomba Combo j9 Plus cost in the UK?
Tracked UK retailer prices for the iRobot Roomba Combo j9 Plus currently range from £363.70 to £465.00, based on offers captured on 13 September 2026. That's a gap of over £100 between the cheapest and most expensive listing we track, which is worth knowing before you settle on a retailer.
| Retailer | Price | Stock status |
|---|---|---|
| eBay | £363.70 | In stock |
| u-buy.co.uk | £465.00 | In stock |
Because marketplace prices like these can come from third-party sellers rather than iRobot directly, check the seller's rating, warranty terms, and return policy before buying, not just the headline figure. This is a snapshot from a single date, and prices on both platforms move often, so treat it as a starting point rather than a live quote.
What's actually in the box
The price covers the robot itself plus the Clean Base dock with Auto-Fill — a detail that's easy to overlook when comparing this listing against cheaper, similarly named iRobot models. The Auto-Fill dock does two jobs most competing docks only do one of: it empties the onboard dustbin into a bag rated for up to 60 days between changes, and it also refills the robot's own mopping water tank, stretching the gap between manual top-ups to up to 30 days. That dual capability is exclusive to this Combo j9 Plus dock, so if you're weighing this price against a robot-only model or a dock that only handles the bin, you're not comparing like for like.
Other specs built into that price: HEPA filtration, a 0.313L onboard bin, a 4.46Ah lithium-ion battery rated for up to 175 minutes of runtime per charge, and a 4.07kg body.
What drives the price of this model
A handful of features explain why the Combo j9 Plus sits toward the top of iRobot's combo range rather than the entry level:
- Auto-Fill Clean Base — the only dock in this lineup that both empties the bin and refills the water tank automatically.
- Dirt Detective, part of iRobot OS, which learns which areas of a home get dirtiest over repeat cleans and adjusts cleaning accordingly.
- SmartScrub mode, applying 1.16lb of downforce for mopping, aimed at dried-on or stubborn spills rather than a light wipe.
- D.R.I. carpet protection, designed to keep mopping pads and water off carpet so the robot can vacuum and mop in one run without soaking rugs.
- PrecisionVision Navigation with two overlapping cleaning passes per run, aimed at more thorough single-visit coverage.
None of these are things you can confirm from a price listing alone. If you're weighing this model against a cheaper Roomba, the full iRobot Roomba Combo j9 Plus review sets out how each of these features is specified, rather than assuming two similarly named models are interchangeable.
Where to buy the iRobot Roomba Combo j9 Plus in the UK
Beyond the two tracked marketplace offers above, most UK shoppers researching the iRobot Roomba Combo price UK will also want to check major electricals retailers and iRobot's own UK store, since our tracked dataset doesn't yet cover every seller and availability shifts. If you're also weighing up other iRobot vacuum cleaners in the range, or want to see how this model's dock and navigation stack up against non-iRobot robot vacuum and mops, running the numbers through a comparison tool is the fastest way to check whether the extra outlay for Auto-Fill suits your home and budget.
A note on this model's naming
iRobot also sells a plain "Roomba j9 Plus" (without "Combo") that shares similar branding — Dirt Detective, PrecisionVision, and a learning navigation system — but does not include this model's mopping hardware, SmartScrub mode, D.R.I. carpet protection, or Auto-Fill water refill. If a listing's title doesn't clearly say "Combo," check the product images and box contents for a mop pad and water tank before assuming it's this model, since some tracked prices for these two models currently coincide.
Does the iRobot Roomba Combo j9 Plus mop as well as vacuum?
Yes — the Combo j9 Plus vacuums and mops in a single run. SmartScrub mode applies 1.16lb of downforce for dried-on or stubborn spills, while D.R.I. carpet protection keeps the mop pad and water off carpeted areas so it doesn't soak rugs mid-clean. This dual-surface ability is one reason tracked UK prices for this model, £363.70 to £465.00 as of 13 September 2026, sit above vacuum-only Roombas. Navigation uses PrecisionVision with two overlapping cleaning passes per run, and the Auto-Fill Clean Base dock handles both bin-emptying and mop water refills automatically between sessions.
How long does the Clean Base dock go between bin empties?
The Clean Base bag holds debris for up to 60 days before it needs changing, based on the manufacturer's stated capacity, emptying the robot's 0.313L onboard bin automatically after each run. This Auto-Fill dock does a second job most competing docks don't: it also refills the robot's own mopping water tank, stretching manual top-ups to up to 30 days. That combined bin-and-water servicing is exclusive to the Combo j9 Plus dock within iRobot's current combo lineup, which is part of why this model's tracked price sits above cheaper combos that only handle the bin.
Does the Auto-Fill dock refill the water tank on its own?
Yes. Auto-Fill refills the robot's onboard mopping water tank automatically, extending the gap between manual top-ups to up to 30 days, in addition to emptying the bin into a bag rated for up to 60 days. That combination — auto-emptying and auto-refilling from a single dock — is exclusive to the Combo j9 Plus within iRobot's current combo range, and it works alongside SmartScrub mode's 1.16lb of mopping downforce and D.R.I. carpet protection. It's a key reason this model's tracked UK price, £363.70 to £465.00, sits toward the top of iRobot's combo lineup rather than the entry level.
What's the battery runtime of the iRobot Roomba Combo j9 Plus?
Up to 175 minutes per charge, powered by a 4.46Ah lithium-ion battery — enough runtime to pair with the Auto-Fill dock's two servicing jobs, emptying the bin every 60 days and topping up the mop's water tank every 30 days, without needing mid-clean intervention. Other specs bundled at the same price include HEPA filtration, a 0.313L onboard bin, and a 4.07kg body. Together, the longer runtime and dual-service dock are part of why the Combo j9 Plus sits toward the top of iRobot's combo range, with tracked UK prices between £363.70 and £465.00 as of 13 September 2026.