Weatherproof Outdoor Storage Cabinets
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A weatherproof outdoor storage cabinet is a closed, upright box with doors, built to keep garden tools, pool supplies and cushions dry on a porch, deck or patio. Amazon lists dozens, and most are the same blow-molded resin panels under different brands. We read the listings for six on October 18, 2026, from a 30-gallon Keter to a 97-gallon Suncast, and compared them on what the pages state: size, capacity, shelves, lock and the care notes. Every figure comes from the listing, not from using the cabinets, and where a page contradicts itself we show both numbers.
Quick answer
People who search weatherproof outdoor storage cabinets want a dry, lockable place for yard gear that does not rust. From the listing facts:
- Biggest stated capacity: the Suncast 97 gallon cabinet holds 97 gallons, with an adjustable shelf and pad-lockable doors (lock not included).
- 60-gallon upright: the Mrosaa cabinet and the ADDOK cabinet are both listed at about 60 gallons and 15 in deep.
- Compact and lockable: the Keter Velo is 30 gallons with steel reinforcement in the body and lid and a lockable latch (lock not included).
- Shelves sold separately: the HOMSPARK cabinet and the Devoko cabinet do not include shelves, even though the HOMSPARK title says “and Shelf”.
Comparison table
All figures are as the listing states them. “Not stated” means the listing text we read gave no number.
| Cabinet | Stated capacity | Stated outside size | Material | Shelf | Lock |
|---|---|---|---|---|---|
| Keter Velo | 30 gal | Not stated | Resin with steel reinforcement | Not stated | Lockable latch, lock not included |
| Mrosaa | About 60 gal | 34.3 x 15 x 36.2 in (axes disagree) | HDPE resin | 1 included, room for 4 | Swivel handle closure; lock not stated |
| HOMSPARK | Not stated | 34 x 16 x 36 in (title) | Double-layer resin | Sold separately | Not stated |
| ADDOK | 60 gal | 34.25 H x 15.08 D x 33.5 W in (description) | HDPE resin | 1 adjustable metal shelf | Not stated |
| Devoko | 26 cu ft | Not stated | HDPE resin | Sold separately | Lockable doors; foot switch and magnet |
| Suncast | 97 gal | 42 L x 23 W x 35.5 H in | Multi-wall plastic panels | 1 adjustable metal-reinforced shelf | Pad-lockable, lock not included |
How we chose these six
We searched Amazon for the phrase and kept free-standing cabinets with doors that are sold for outdoor use and state a size or capacity. We left out fire extinguisher boxes, electrical enclosures, metal sheds, potting benches with cabinets, and deck boxes with lids and no doors, because they solve other problems. We opened each listing once and saved the specs, with no prices or ratings.
What the pages leave out matters. Three of the six (Mrosaa, HOMSPARK and ADDOK) describe no lock, none gives a weight limit for the shelves, and “waterproof” and “weather-resistant” are seller words, not a rating. Look at the care and safety notes instead: they are where the cabinets differ.
The six cabinets
1. Suncast Lockable Outdoor Cabinet, 97 Gal – the largest stated capacity
Specs (from the listing, checked October 18, 2026): 97 gallon capacity; interior 37.25 in L x 17.5 in W x 32.5 in H; exterior 42 in L x 23 in W x 35.5 in H; weighs 59.2 lb; multi-wall panels; one adjustable, metal-reinforced shelf; pad-lockable doors, lock not included; wicker-style design; snap-together assembly in about 30 minutes solo per the listing; wipe clean with a damp cloth. Safety information on the page: keep the lockable doors unlocked when not in use to prevent accidental entrapment, and supervise children near it.
Pros: The biggest capacity and the only listing that gives both interior and exterior sizes plus weight.
Cons and limits: Multiply the stated interior size and you get about 91.7 gallons, not 97 (see the worked example), so the 97 may include space the shelf or lid rim uses. Amazon’s summary of customer comments says some buyers find the doors difficult to open and close.
Best for: a covered deck or patio where you want one tall closet for tools, grill gear and pool toys. Skip if: your space is narrower than 23 in or you want the lightest unit; this is the largest in the group.
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2. Mrosaa Indoor Outdoor Storage Cabinet (60 gal) – the one with the clearest interior sizes
Specs (from the listing, checked October 18, 2026): about 60 gallon capacity; the title gives 34.3 in L x 15 in W x 36.2 in H, while the description gives 34.3 in H x 15 in D x 36.2 in W; interior 32.3 in H x 13 in D x 33.9 in W; HDPE resin described as UV resistant, rustless and waterproof; one shelf included, room for four, shelf size 33.2 x 10 x 0.6 in; upgraded rotatable handle for a tighter door closure; assembly about half an hour with simple tools; safety information says lift components carefully because of the 45 lb weight.
Pros: Interior and exterior sizes both given, a care instruction (rinse the interior with a hose) and room for four shelves. The listing says it can be used indoors or out.
Cons and limits: Listing conflict: the title and the description swap which side is the height and which is the depth. Amazon’s summary of customer comments reports mixed feedback on door function, including doors that do not stay closed. No lock is described.
Best for: a porch or pool-side corner where you need a tall, shallow cabinet for towels and gear. Skip if: you need a published lock or a published shelf weight limit.
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3. ADDOK Outdoor Storage Cabinet (60 gal) – double doors, one metal shelf
Specs (from the listing, checked October 18, 2026): 60 gallon capacity; the bullet gives overall size as 34.3 in L x 15 in W x 36.2 in H, while the description gives exterior 34.25 in H x 15.08 in D x 33.5 in W and interior 33.98 in H x 13.5 in D x 30.31 in W; HDPE resin; one adjustable, removable metal shelf; wide double doors; hardware and instructions included; white and black colors, with 1, 2 and 3 shelf options.
Pros: Interior size is stated, and the interior volume works out to about 60 gallons, which matches the label. The listing pitches the upright shape as saving floor space next to patio furniture or a garage wall.
Cons and limits: Listing conflict: width is 36.2 in in the bullet and 33.5 in in the description, a 2.7 in gap that matters if you are measuring a tight spot. No lock is described. Amazon’s summary of customer comments notes door function as a problem for some buyers.
Best for: a narrow gap beside a pool or garage wall. Skip if: you need to be sure of a 36 in opening; measure with both numbers in mind.
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4. Keter Velo 30 Gallon Outdoor Storage Cabinet – small, steel-reinforced, lockable
Specs (from the listing, checked October 18, 2026): 30 gallon capacity; resin with steel reinforcement in both body and lid; built-in ventilation; integrated handles; wood-look finish in Graphite; lockable latch, lock not included; the listing says it is designed to withstand sun, rain and snow without rusting, peeling or rotting; one-pack and two-pack styles; Amazon files it under Deck Boxes.
Pros: Built-in ventilation, which the listing says prevents moisture buildup. The smallest unit here, so the easiest to place on a balcony.
Cons and limits: The bullets give no outside dimensions, shelf details or weight. At 30 gallons it is half the size of the 60 gallon models, and the listing is filed under deck boxes even though the name says cabinet.
Best for: a balcony or a small patio corner holding cushions, gloves and hand tools. Skip if: you need to store long-handled tools or want several shelves.
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5. HOMSPARK Indoor/Outdoor Storage Cabinet (34 x 16 x 36 in) – double-layer resin
Specs (from the listing, checked October 18, 2026): 34 x 16 x 36 in in the title; double-layer resin sheet made with blow molding technology; room for 4 shelves, sold separately; assembled in under an hour with a screwdriver and an Allen key; sold in several colors; the description says the resin is highly weather resistant and handles rain, snow and sun.
Pros: A plain, widely-sold design with adjustable shelf positions, and the maker spells out how the panels are made.
Cons and limits: Listing conflict: the title says “with Doors and Shelf”, while the bullet says shelves are sold separately, so confirm what ships in your box. Related HOMSPARK listings show 34 x 15 x 34 in, so check which model you are ordering. No capacity in gallons, no weight and no lock are stated. Amazon’s summary of customer comments reports mixed results on door closing.
Best for: shoppers who want a plain, widely sold design and will add shelves themselves. Skip if: you want a stated capacity or a lock detail from the listing.
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6. Devoko Outdoor Storage Cabinet, 26 Cu Ft – the shed-sized option
Specs (from the listing, checked October 18, 2026): 26 cubic feet, which is about 194 gallons; HDPE resin with double-layer blow-molded panels; shelves sold separately; a foot switch and a top magnet close the doors; the listing says one person can assemble it in about 20 minutes; the title calls it horizontal, while the size selector reads 26 Cu Ft/Vertical; 50 cu ft size also offered. Safety information: install shelves properly and anchor the unit to prevent tipping in bad weather.
Pros: By far the most storage here; the listing’s own examples include weed whackers, couch cushions and sports equipment. The foot-operated door closure is a distinct feature.
Cons and limits: Listing conflict: the title says horizontal and the size selector says vertical, and the page gives no dimensions in inches, so you cannot check that it fits your space. Shelves are an extra purchase. Amazon’s summary of customer comments mentions concerns about the door locking mechanism and, for some buyers, doors that fell off.
Best for: a garden shed alternative for tall, bulky gear. Skip if: you need a small footprint or want to know the size before ordering.
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Worked example: does the capacity match the box?
For example, convert the stated interior size to gallons with length x width x height in inches divided by 231 (one US gallon is 231 cubic inches). Suncast: 37.25 x 17.5 x 32.5 = about 21,186 cu in, or 91.7 gal, against a stated 97. Mrosaa: 32.3 x 13 x 33.9 = about 14,235 cu in, or 61.6 gal, against about 60. ADDOK: 33.98 x 13.5 x 30.31 = about 13,904 cu in, or 60.2 gal, against 60. The two 60-gallon labels hold up; the Suncast label is about 6 percent above its box. That is a rule of thumb, not a flaw, because ribs and the lid rim change the usable space.
Now compare units. A cubic foot is about 7.48 gallons, so the Keter’s 30 gallons is roughly 4.0 cu ft, the 60-gallon models are about 8.0 cu ft and the Suncast is about 13.0 cu ft. The Devoko’s 26 cu ft is about 194 gallons, roughly twice the Suncast, so it belongs to a different class of storage. Height matters too: the three cabinets with stated interiors are 32.3 to 33.98 in tall inside, so a tool longer than about 33 in will not stand upright.
Safety notes from the listings
- Suncast: keep the doors unlocked when the cabinet is not in use to prevent accidental entrapment, and supervise children near it.
- Devoko: install shelves as instructed and anchor the unit so it does not tip or move in bad weather.
- Mrosaa: lift parts carefully because of the 45 lb weight, assemble on a stable surface and do not exceed the storage capacity.
- All of them: none of the listings tells you what you may store inside, such as fuel or chemicals. Follow each product’s manual and the label on whatever you store.
Mistakes to avoid
- Trusting one dimension. Mrosaa and ADDOK each give two different sets of outside dimensions on one page; use the smaller opening when you measure.
- Assuming shelves are included. HOMSPARK and Devoko sell shelves separately; the HOMSPARK title still says “and Shelf”.
- Reading “waterproof” as a rating. Keter, Mrosaa and ADDOK use the word, but none cites a test or rating.
- Skipping the anchor. The Devoko listing says to anchor it against tipping; the other listings do not address tipping, so check each manual.
- Mixing up units. 26 cu ft and 60 gal are not close; convert before comparing.
More for your outdoor storage
If your yard gear includes a hose, see our guides to a heavy-duty garden hose reel, a 4-wheel hose reel cart and a free-standing hose holder. They are the closest topics we have to this one.
Who should skip an outdoor storage cabinet
If you only need to keep cushions dry, a deck box with a lid costs less space and is a simpler fit. If you want to store a mower or large power tools, a shed is a better match than a cabinet. If winters in your area are harsh, check the manufacturer’s care notes for cold-weather use, since none of these listings gives a temperature range.
Frequently asked questions
Which cabinet holds the most?
The Devoko is listed at 26 cubic feet, about 194 gallons. The Suncast is listed at 97 gallons, and the two 60-gallon cabinets are Mrosaa and ADDOK.
Do these cabinets include shelves?
Mrosaa, ADDOK and Suncast include one shelf. HOMSPARK and Devoko sell shelves separately. The Keter listing does not mention shelves.
Can I lock them?
Keter has a lockable latch and Suncast has pad-lockable doors, both without a lock. Devoko is titled as having lockable doors. Mrosaa describes a rotatable handle closure, and the others do not describe a lock.
Are they waterproof?
The listings use the words waterproof and weather-resistant, but none gives a tested rating. Treat them as seller claims and read the care notes.
How big are they inside?
Suncast is 37.25 x 17.5 x 32.5 in inside, Mrosaa is 32.3 x 13 x 33.9 in (H x D x W) and ADDOK is 33.98 x 13.5 x 30.31 in (H x D x W). The others do not state interior sizes.
