The best robot lawn mowers for large gardens

A big lawn changes what matters in a robot mower. On a small plot almost anything will keep up; on 2,000 m² or more, a narrow cut, a small battery or navigation that stalls under a line of trees means the mower never quite finishes. This shortlist covers lawns over 1,500 m², with options up to estate size. We haven't tested these mowers hands-on; the picks are desk-based judgements from manufacturer specifications, manuals, UK warranty terms and prices.

How we chose

We started with every current family in our catalogue that is sold in the UK and rated for at least 2,000 m² in one version, then narrowed the list on five points:

• Rated area with headroom. We recommend a rating at least 20% above your lawn, more if it's divided or cluttered. We also checked where manufacturers publish lower "recommended" figures in their manuals.
• Cut width and battery. A wider disc covers more ground per pass, which matters more as lawns get bigger.
• Navigation over large, mixed ground. Big gardens tend to include open lawn, tree lines and outbuildings. Mowers that fuse network RTK with LiDAR or cameras have the fewest weak spots on paper.
• Slopes and 4G. Large lawns are rarely flat, and a stolen large mower is an expensive loss, so slope ratings and built-in tracking counted.
• A UK price and support. We preferred families with a published UK RRP or brand-store price and a clear UK warranty. Dealer-only models were included where the dealer network is part of the appeal.

Segway Navimow X4 (X450)

The Segway Navimow X4 Series is the most complete large-lawn package on paper. The X450 is rated for 5,000 m² and cuts a 430 mm strip with two discs, so it covers big areas in far fewer passes than the 220–240 mm mowers most brands use. It positions itself with network RTK over 4G plus 360° cameras and time-of-flight sensing, so there's no aerial to mount. Four-wheel drive and a 84% rating handle banks, although Navimow says that figure was achieved under manual remote control, and up to 120 zones cover a divided property.

It isn't for everyone. The X4 weighs 29.2 kg, Navimow quotes 68 dB(A), and you'll buy it through a dealer or retailer. The smaller X420 is rated for 2,000 m². Prices start from £2,199.

Mammotion LUBA 3 AWD (3000 or 5000)

The Mammotion LUBA 3 AWD is our choice where a large lawn also has trees, buildings or steep banks. The 3000 and 5000 use three sources of position: network RTK over the built-in 4G connection for open ground, plus LiDAR and cameras for shaded areas near the house or under trees. All-wheel drive gives it a 80% rating, and the 400 mm cut is nearly as wide as the X4's. Mammotion includes 36 months of 4G data and a 3 years warranty.

Two cautions. The 1500 version has no network RTK and much less area per charge, so for a large lawn choose the 3000 (3,000 m²) or 5000. And Mammotion quotes 70 dB(A), loud enough to think about your schedule. The 3000 starts from £2,099.

Husqvarna Automower 430V NERA

The Husqvarna Automower 430V NERA suits buyers who want a dealer to install and service a big mower. Husqvarna rates it for 4,800 m² of systematic mowing. It gets its RTK corrections from the cloud over built-in cellular or Wi-Fi, so most gardens need no reference station, and an AI camera with infrared helps with obstacles and weak-signal spots. At 56 dB(A) it's the quietest mower on this list by the makers' own figures.

The drawbacks are price and cover. It costs more than rivals rated for similar areas, the warranty is 2 years, and while the overall slope rating is 50%, Husqvarna allows only 25% along the boundary. Current price: £3,799.

STIGA A v range large (A 50v to A 140v)

For grounds well beyond an acre, the STIGA A v range large (A 50v to A 140v) goes furthest, with ratings of 5,000–14,000 m². It uses network RTK over 4G with no antenna in the garden, adds an AI camera for obstacles, cuts 260 mm and manages 30 zones. STIGA includes 120 months of connectivity, which is exceptional.

The dependency on that connection is the catch. STIGA says the robot won't mow without it, so check coverage across the whole property with Ofcom's mobile coverage checker before you buy, and be wary if large parts of the lawn sit under mature trees. Prices start from £2,999.

Segway Navimow i2 LiDAR (i220 LiDAR)

If your lawn is at the smaller end of "large", say 1,500 m², the Segway Navimow i2 LiDAR i220 LiDAR is rated for 2,000 m² and costs far less than the flagships. LiDAR navigation means no satellites, no aerial and no reliance on 4G for positioning, which suits lawns enclosed by houses, walls and hedges. It still has built-in 4G for remote control and tracking, a 220 mm cut and a 3 years warranty.

It's not a true big-lawn machine: two-wheel drive limits it to 45%, and on a wide, open lawn with little nearby for the LiDAR to range against, an RTK or hybrid mower is the safer choice. The i220 LiDAR costs £1,399.

Honda Miimo HRM (2500 Live or 4000 Live)

If you'd rather have a wire, or your grounds are too wooded for satellite navigation, the Honda Miimo HRM 1000 to 4000 range goes up to 4,000 m² with the 4000 Live, which adds a 250 mm cut and automatic height adjustment. The Live models have built-in 4G with GPS tracking. Honda's 5 years domestic warranty is the longest standard cover we list, though it depends on dealer registration and servicing.

The price of that dependability is installation: hundreds of metres of boundary wire on a big lawn, and islands for every bed and tree. Honda's manuals also give recommended areas below the headline figures, so size up. The 4000 Live costs £2,995.

Buying advice for large lawns

• Measure properly. Draw round the lawn with our lawn size tool. Big lawns are often over-estimated because paths, beds and shrubberies get counted.
• Check signal where the mower works, not at the house. Walk the far end of the lawn with your phone. For network RTK models, read our network RTK and 4G guide.
• Plan the charging station. It needs power, a flat spot and, for RTK models, a reasonable view of the sky. On a large property that may mean an outdoor socket run by an electrician.
• Think about weight and access. Large mowers weigh 13–30 kg. If you'll carry one between separate areas, check the figure on the model page, and check any side passage against the mower's width.
• Budget beyond the RRP. Include a garage if you want one, 4G renewals after the included period and replacement blades. Our running-costs calculator estimates a yearly figure.
• Consider the slope too. If parts of the grounds are steep, see our best robot mowers for slopes.