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Last updated November 2026

iRobot Roomba Plus 405

Accurate room mapping, automatic mop-pad lifting over rugs and a self-emptying dock at an accessible price, with mixed reliability reports from some owners.

3.2
482 ratings
18% OFF
$799.99
$659.40
As an Amazon Associate I earn from qualifying purchases
Launch Year: 2025

Model: G185020

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Our review

iRobot Roomba Plus 405 Review: An Affordable Vacuum and Mop Combo With Real LiDAR Mapping

The verdict

The Roomba Plus 405 pairs LiDAR-based mapping with a vacuum-and-mop combo and an AutoWash dock at a more accessible price point than iRobot's higher-tier models. Owners frequently praise the accurate mapping, the automatic mop-pad lifting over carpet, and how much time it saves on daily upkeep, while a vocal minority report reliability issues like lost WiFi connections, ignored schedules or inconsistent docking after the first month or two. It's a strong value pick for buyers who want a real vacuum-and-mop combo without paying flagship prices, as long as you're prepared to troubleshoot occasional software quirks.

Best for
  • Budget-conscious buyers wanting vacuum and mop in one
  • Pet owners dealing with daily shedding
  • Homes with mixed hard floors and rugs
  • Buyers who want Alexa or Google Home voice control

Pros

  • Accurate LiDAR mapping with multi-room support and no-go zones
  • Automatic mop-pad washing and drying at the AutoWash dock
  • Mop pads automatically lift over carpet to avoid soaking rugs
  • Google Home, Alexa and IFTTT support
  • Strong day-to-day pickup of pet hair according to owners

Cons

  • No Z-Wave, Zigbee or Thread
  • Some owners report WiFi drops, ignored schedules or docking issues after initial use
  • No printed manual, setup and instructions live entirely in the app
  • Cleaning noise bothers a portion of owners

Who is the Roomba Plus 405 for?

The Plus 405 targets buyers who want the core benefits of iRobot's combo lineup, LiDAR mapping, automated mopping, and a self-emptying dock, without stepping up to a flagship price. It supports carpet cleaning, multi-room mapping and no-go zones, and its mop pads automatically lift when carpet is detected so rugs don't get soaked. With Google Home, Alexa and IFTTT support it covers the common voice assistants, but buyers who want Apple Home or Matter need to step up to the Plus 505 or a Max model.

What buyers love

Many owners highlight how much quieter and more accurate this model is compared to older Roombas they'd previously owned, crediting the LiDAR mapping for reliably building an accurate home layout. The auto mop-wash and auto mop-drying features (both supported per the spec sheet) come up repeatedly as a genuine convenience, letting the dock handle pad maintenance between runs. Buyers with pets specifically call out strong day-to-day pickup of shedding, and the automatic detection of carpet versus hard floor for mopping decisions matches the JSON's auto-mop-lifting spec.

What to know before you buy

The clearest recurring complaint is inconsistent reliability for some units: a handful of owners describe the robot losing WiFi mid-run, ignoring scheduled routes, or having trouble finding its way back to the dock after the first month or so of otherwise normal use. A couple of reviewers also wished the cleaning noise were lower and noted the lack of a printed manual (setup and instructions live entirely in the companion app). iRobot lists dual-band WiFi (2.4GHz and 5GHz), though some owners found pairing easiest from a 2.4GHz connection, and Bluetooth is included but there is no Z-Wave, Zigbee or Thread support.

Is the Roomba Plus 405 worth it?

For the price, the Plus 405 packs in real LiDAR navigation, automatic mopping with pad washing and drying, and a self-emptying dock, features that used to be reserved for pricier models. Most owners describe it as a genuine time-saver for daily upkeep, particularly with pets in the house, though the software reliability complaints from a minority of buyers are worth weighing if you want a completely hands-off experience from day one. Overall it's a compelling value for anyone wanting a combo vacuum and mop without a flagship price tag.

Frequently asked questions

Does the Roomba Plus 405 mop and vacuum in the same run?

Yes, it supports both vacuuming and mopping, and automatically lifts its mop pads when it detects carpet so rugs stay dry.

Does the Roomba Plus 405 work with Matter and Google Home?

It works with Google Home, Amazon Alexa and IFTTT, but not with Matter. It does not support Apple HomeKit, Samsung SmartThings or Home Assistant either.

How often do I need to empty the Roomba Plus 405?

It has a self-emptying dock, and the mop pads are automatically washed and dried at the dock as well, reducing manual maintenance between runs.

Is the Roomba Plus 405 reliable long-term?

Most owners report consistent performance, but a portion describe reliability issues emerging after the first month or two, such as WiFi drops or ignored schedules, so factor in some setup and troubleshooting patience.

What warranty does the Roomba Plus 405 come with?

It comes with a 1 year manufacturer warranty.

Company
iRobot logo

iRobot

3.7/ 5 avg ratingUSA flagHeadquartered in USA

iRobot is the US company behind the Roomba robot vacuums and Braava robot mops, a pioneer of consumer home robotics. Its vacuums are known for smart mapping, automatic dirt disposal and app-based scheduling, and integrate with Alexa and Google Home. iRobot is one of the most recognized names in automated floor cleaning.

Full specifications

Every spec, organized

Browse the full breakdown by category. Tap the on any row for what it means, or the for sources and documentation.

Vacuum Dimensions

14.1 × 13.8 × 4.2 in 357 × 351 × 106 mm

Vacuum Weight

9 lb 4.1 kg

Dock Dimensions

17.7 × 12.4 × 18.6 in 450 × 315 × 472 mm

Dock-Weight

13.9 lb 6.3 kg

Battery Life

180 minutes

Charging Time

4.5 hours

Auto Recharge

YES

2.4 GHz WiFi

YES

5 GHz WiFi

YES

iRobot's Wi-Fi band table lists the Roomba Plus 405 Series as supporting both 2.4 GHz and 5 GHz networks.

Bluetooth

YES

iRobot's feature table lists Bluetooth for the Roomba 405 series.

Z-Wave

NO

Zigbee

NO

Thread Protocol

NO

Google Home

YES

Alexa

YES

Apple HomeKit

NO

Samsung SmartThings

NO

Home Assistant

NO

The Home Assistant Roomba integration states it does not work with the newer x05 Wi-Fi models, and this one has no Matter path either

Matter

NO

Navigation Type

Laser (LiDAR)

Obstacle Detection

YES

Cliff Detection

YES

Multi-Room Mapping

YES

No-Go Zones

YES

Suction Power

7000Pa

Carpet Cleaning

YES

Side Brushes

YES

Mopping Functionality

YES

Water Tank Capacity

?

Detergent Compatibility

YES

Auto Detergent Dispenser

NO

Auto Mop Washing

YES

Auto Mop Drying

YES

Auto Mop Lifting (For Carpet)

YES

Onboard Dustbin Capacity

?

Self-Emptying Dustbin

YES

Dock Dustbin Capacity

?

Noise Level

?

Real-Time Tracking in App

YES

Scheduling

YES

Child Lock

YES

Local Control

NO

The local Home Assistant Roomba integration does not work with the newer x05 Wi-Fi models such as the Roomba 105 and 405, and the robot has no Matter or HomeKit support, so it is controlled only through the iRobot app.

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Official accessories

Accessories and replacement parts for iRobot Roomba Plus 405

  • iRobot Roomba Plus 505 Filter (Pack of 3)

    iRobot Roomba Plus 505 Filter (Pack of 3)

    $19.99

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  • iRobot Dirt Disposal Bags for Roomba Plus 575 Combo (Pack of 3)

    iRobot Dirt Disposal Bags for Roomba Plus 575 Combo (Pack of 3)

    $19.99

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  • iRobot Edge-Sweeping Brush for Roomba 105/205 (Pack of 3)

    iRobot Edge-Sweeping Brush for Roomba 105/205 (Pack of 3)

    20% OFF$16.09$19.99

    Buy
  • iRobot Multi-Surface Rubber Brush for Roomba Plus 505 Combo

    iRobot Multi-Surface Rubber Brush for Roomba Plus 505 Combo

    $19.99

    Buy
  • iRobot DualClean Mop Pad for Roomba Plus 505 Combo (Pack of 6)

    iRobot DualClean Mop Pad for Roomba Plus 505 Combo (Pack of 6)

    $24.99

    Buy
  • iRobot Replenishment Kit for Roomba Plus 505 Combo

    iRobot Replenishment Kit for Roomba Plus 505 Combo

    $39.99

    Buy
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