At a glance
Choosing the wrong lawn mower is one of those purchases people regret for years. Buy a mower that’s too small for your lawn and every cut becomes a chore. Buy one that’s too powerful for a small garden and you’re pushing something heavy and awkward around a space that would have been better served by something nimble. Getting this decision right from the start makes lawn maintenance significantly easier.
This guide is written specifically for UK garden conditions – which means clay soil, slopes, wet grass in spring and autumn, and lawns that are often irregularly shaped rather than the neat rectangles most buying guides assume.
Mower types compared
| Type | Best lawn size | Running cost | Maintenance | Noise | Verdict |
|---|---|---|---|---|---|
| Corded electric | Up to 200m² | Very low | Minimal | Low | Best for small gardens |
| Battery (cordless) | 100-500m² | Low | Minimal | Low | Best all-rounder |
| Petrol (push) | 200-800m² | Medium | Annual service | High | Best for medium-large gardens |
| Petrol (self-propelled) | 400m²+ | Medium | Annual service | High | Best for slopes |
| Robot mower | 200m²-3,000m² | Very low | Occasional | Very low | Premium option |
| Cylinder (push) | Up to 200m² | None | Occasional | None | For fine lawns only |
Electric mowers – best for small UK gardens
A corded electric mower is the right choice for most UK gardens under 200m². They’re significantly lighter than petrol equivalents, require virtually no maintenance, cost almost nothing to run and produce a good cutting result on a typical domestic lawn.
The main disadvantage is the cable – you need a long enough extension lead to reach all areas of the lawn, and the cable needs managing carefully to avoid running over it. On a small, straightforward lawn this is a minor inconvenience. On a larger or irregularly shaped garden it becomes genuinely annoying.
What to look for in an electric mower:
- 1000-1800W motor – anything under 1000W will struggle with longer grass
- 33-40cm cut width for gardens under 200m²
- Rear roller for striping – if you want lawn stripes, you need a roller behind the blade
- Grass box capacity of at least 40 litres – emptying constantly is frustrating
- Height adjustment from at least 20mm to 60mm
Battery mowers – the best all-round choice
Battery-powered mowers have improved dramatically in the last five years and are now the best choice for most UK domestic gardens. They combine the low maintenance and quiet operation of electric mowers with the freedom of movement of petrol, without the cable management issue.
Modern lithium-ion battery mowers from brands like Greenworks, EGO, Bosch and Makita will handle 200-500m² per charge and recharge in 30-60 minutes. The batteries are also often compatible with other tools from the same brand – a significant additional value if you already own battery tools.
Battery capacity matters more than voltage: A 56V/5Ah battery stores more energy than a 56V/2Ah battery. Check amp-hours (Ah) rather than just voltage when comparing models.
Petrol mowers – for larger gardens and slopes
Petrol mowers remain the best choice for large gardens over 400m², heavily sloped ground or lawns that are cut infrequently (where long grass demands more cutting power than battery can provide).
The downsides are real – petrol mowers are louder, heavier, more expensive to run and require an annual service including oil change, air filter replacement and spark plug check. They also need to have the fuel drained or stabiliser added if stored for the winter.
Self-propelled is worth the extra cost on any sloped garden. Pushing a petrol mower up a slope is hard work and potentially dangerous on steeper ground. A self-propelled mower drives itself forward at walking pace – you just guide it. The extra £50-100 on the purchase price pays for itself in effort saved within the first season on anything but a completely flat lawn.
Robot mowers – the hands-off option
Robot mowers have become genuinely viable for UK domestic gardens over the past few years. They work on the principle of constant small cuts – running daily or several times per week, they keep the lawn consistently short without any effort from you. The fine clippings they produce act as a natural mulch and feed the lawn.
The upfront cost remains significant – entry-level models start at around £400-600, with quality models for medium gardens costing £800-1,500. Installation requires laying a perimeter wire around the lawn boundary, which takes a few hours on a first installation.
Robot mowers work best on: regularly shaped lawns without complex island beds, slopes under 35 degrees, lawns that don’t have significant debris problems (leaves, twigs).
Key features to look for regardless of type
- Cutting height adjustment – minimum range of 20-65mm. Never cut below 30mm on a UK lawn – this weakens the grass and encourages moss and weeds.
- Rear roller – essential if you want the traditional striped British lawn look. Only available on some models.
- Mulching capability – finely chops clippings and returns them to the lawn. Reduces the need for grass box emptying and feeds the lawn naturally.
- Grass box size – at least 50 litres for gardens over 150m².
- Cut width – wider is faster but less manoeuvrable in tight spaces. 33-40cm for most UK gardens.
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The right mower makes lawn maintenance genuinely effortless rather than a chore you put off. Match the mower to your lawn size and terrain, invest in a rear roller if stripes matter to you, and buy from a brand with good UK parts availability for long-term reliability. For more on keeping your lawn in top condition read our guide on the best lawn feeds for UK gardens.
