A wall safe lives inside your stud cavity, so the internal size you get is capped by the wall itself, not by the safe alone — get the cavity size wrong and the unit either won't fit or ends up too small to be useful. This guide ranks the wall safe options at Security Safes by cavity size and use case so you can match the safe to the wall you actually have.
- Guardall HV1 wins as the best overall wall safe cavity size pick for standard Australian stud walls in 2026.
- CMI Miniguard Size 2 is the best budget option for a single stud bay install.
- Guardall HV3 carries the largest cavity in this lineup for households with more to store.
- The Nova NV1 suits rental and apartment installs where drilling options are limited.
- Chubbsafes Viper Size 50 is the pick when insurance certification matters more than cavity depth.
Why this matters
A wall safe recessed into a stud cavity is only as good as the space it sits in. Australian residential framing typically runs studs at 450mm to 600mm centres, using 90mm timber or steel studs — that's the real ceiling on how deep and how wide a wall safe cavity size can go before you're into double-stud or masonry territory. Buy on brand name alone and you risk a safe that either doesn't clear the noggin above the frame or leaves so little clearance the door won't swing.
This matters more in 2026 than it used to, because more of the wall safe range now ships with digital locks and thicker fire linings — both of which eat into usable cavity space compared to older key-only models. Getting the right safe size for your home before you buy saves a return and a re-cut wall.
What makes the best wall safe
- Cavity fit against standard stud spacing — does the body clear a single 450mm or 600mm bay without cutting a second stud
- Door swing clearance — enough depth in front of the recess for the door to open fully once mounted
- Lock type — key, combination, or digital, and how much of the cavity the lock mechanism itself occupies
- Fire lining thickness — fire-rated models trade some usable cavity for the fire barrier
- Mounting hardware — pre-drilled fixing points that anchor into the stud rather than just the plasterboard
- Certification — whether the unit carries a recognised burglary or insurance rating for its size class
Wall safes at a glance
| Safe | Best for | Standout feature | Key limitation |
|---|---|---|---|
| Guardall HV1 | Overall cavity efficiency | Compact body suited to a single stud bay | Smaller door opening limits bulky items |
| CMI Miniguard Size 2 | Budget-conscious buyers | Simplest lock and lining setup in the range | Fewer certification extras than premium models |
| Guardall HV2 | Growing valuables collection | Steps up cavity depth from the HV1 | Needs a slightly wider bay than HV1 |
| The Nova NV1 | Rental and apartment installs | Lower mounting demands, easier to relocate | Not built for permanent masonry recessing |
| Guardall HV3 | Maximum cavity capacity | Largest internal volume in the HV series | May require a double stud bay in older framing |
| CMI Miniguard Size 4 | Combined document and valuables storage | More internal shelving room than Size 2 | Deeper body needs more wall depth to recess |
| Secuguard SHS4E | Digital lock convenience | Electronic keypad entry | Keypad housing takes up front cavity space |
| Chubbsafes Viper Size 50 | Insurance-rated storage | Recognised security rating for its class | Heavier body adds to install complexity |
1. Guardall HV1 Home Safe: best wall safe cavity size for standard studs
The Guardall HV1 home safe is built to sit inside a single standard stud bay, which is why it tops this list for most Australian homes in 2026. It's a wall-mount unit designed for documents, jewellery and small valuables rather than bulk cash storage.
Guardall HV1 pros:
- Fits a standard single stud cavity without extra framing work
- Compact door swing suits tight hallway or wardrobe installs
- Straightforward key or lock option keeps the mechanism simple
Guardall HV1 cons:
- Internal space is limited compared to the HV2 and HV3 in the same range
- Not the choice for anyone storing larger documents or multiple jewellery boxes
Guardall HV1 best for: homeowners fitting a wall safe into an existing stud wall without altering the frame. Verdict: Buy.
2. CMI Miniguard Domestic Security Safe Size 2: best budget wall safe
The CMI Miniguard Size 2 is the entry point into CMI's domestic range, aimed at buyers who want a recessed safe without paying for extra certification layers. It handles the basics — passports, spare keys, small valuables — in a body that still respects standard cavity limits.
CMI Miniguard Size 2 pros:
- Lower-cost entry into a genuine recessed wall safe
- Fits the same single-bay footprint as most compact competitors
- Simple lock mechanism, easy for first-time safe owners to operate
CMI Miniguard Size 2 cons:
- Fewer premium features (no digital lock option in this tier)
- Best suited to low-to-moderate value items, not high-value jewellery collections
CMI Miniguard Size 2 best for: first-time buyers who want a working wall safe without a premium price tag. Verdict: Buy.
3. Guardall HV2 Home Safe: best wall safe for a growing valuables collection
The Guardall HV2 sits a step up from the HV1 in the same product family, built for households that have outgrown a single small unit but still want a wall-recessed install rather than a floor safe.
Guardall HV2 pros:
- More internal room than the HV1 while keeping the same wall-mount format
- Shares the HV1's straightforward lock and fixing approach
- Good middle ground before stepping up to the HV3
Guardall HV2 cons:
- Needs a slightly wider or deeper cavity check before purchase
- Still not built for large document storage or bulky items
Guardall HV2 best for: households adding jewellery, watches or spare cash storage beyond what a HV1 handles. Verdict: Buy.
4. The Nova NV1: best wall safe for rental and apartment installs
The Nova NV1 suits tenants and apartment owners who want secure storage without committing to permanent masonry recessing. It's a smaller-footprint option that works where landlord approval or strata rules limit how much you can alter a wall.
Nova NV1 pros:
- Lower mounting demands than a fully recessed masonry install
- Compact enough to relocate if you move
- Suits documents, passports and small valuables
Nova NV1 cons:
- Not designed for a full masonry recess the way heavier safes are
- Smaller cavity than the HV2 or HV3 for anyone with more to store
Nova NV1 best for: renters and apartment dwellers who need secure storage without permanent wall modification. Verdict: Buy for rentals, skip if you own and want a full recess.
5. Guardall HV3 Home Safe: best wall safe for maximum cavity capacity
The Guardall HV3 is the largest unit in the HV series, built for households that want the biggest wall-recessed cavity Security Safes carries in this line-up. It's the pick when a HV1 or HV2 simply won't hold everything.
Guardall HV3 pros:
- Largest internal volume of the HV range
- Same family lock and fixing system as the HV1 and HV2, so installation logic carries over
- Suits households consolidating multiple smaller safes into one unit
Guardall HV3 cons:
- May require a double stud bay or masonry opening in older homes
- Heavier body means installation isn't a quick DIY afternoon job for everyone
Guardall HV3 best for: homes needing the largest wall cavity in this range for a growing valuables list. Verdict: Buy if your wall can take it.
6. CMI Miniguard Domestic Security Safe Size 4: best for documents and valuables combined
The CMI Miniguard Size 4 steps up from the Size 2 with more internal shelving room, aimed at buyers who want to store both paperwork and valuables in the one recessed unit rather than splitting them across two safes.
CMI Miniguard Size 4 pros:
- More usable shelving than the Size 2 in the same family
- Keeps the same simple lock logic as the entry-level Size 2
- Good option for combining passports, deeds and small valuables
CMI Miniguard Size 4 cons:
- Deeper body means more wall depth is needed before it fits flush
- Still sits below the HV3 in raw cavity volume
CMI Miniguard Size 4 best for: buyers who want one wall safe to cover both document storage and valuables. Verdict: Buy.
7. Secuguard SHS4E Home Safe: best wall safe for digital lock convenience
The Secuguard SHS4E swaps a mechanical lock for an electronic keypad, aimed at buyers who want quick-access entry over turning a key or dialling a combination.
Secuguard SHS4E pros:
- Electronic keypad entry for faster daily access
- No physical key to lose or misplace
- Suits households that want quick access for frequently used items
Secuguard SHS4E cons:
- The keypad housing takes up some of the front cavity space
- Battery-dependent lock means you need to track battery life
Secuguard SHS4E best for: households that prioritise quick digital access over maximum cavity depth. Verdict: Buy.
8. Chubbsafes Viper Size 50: best insurance-rated wall safe
The Chubbsafes Viper Size 50 is the pick when a recognised security rating matters more than squeezing out the largest possible cavity. It suits buyers whose insurer asks for a certified unit to cover higher-value contents.
Chubbsafes Viper Size 50 pros:
- Carries a recognised security certification for its class
- Chubbsafes name recognition can simplify insurance conversations
- Solid build quality typical of the Chubbsafes range
Chubbsafes Viper Size 50 cons:
- Heavier body adds complexity to a wall-recessed install
- Not the first choice if raw cavity size is your only priority
Chubbsafes Viper Size 50 best for: homeowners who need a certified safe for insurance purposes. Verdict: Buy if certification is the deciding factor.
“A wall safe is only as strong as the stud bay it's recessed into.”
How this list was ranked
Each wall safe here was placed against the six criteria above, starting with cavity fit against standard 450mm to 600mm stud spacing, then door clearance, lock type, fire lining thickness, mounting hardware and certification. The ranking runs smallest practical cavity to largest, with budget and use-case picks called out separately so the list reads as a decision tree rather than a straight leaderboard.
Which wall safe should you choose?
For most Australian homes fitting a wall safe into an existing stud wall, the Guardall HV1 is the default pick in 2026 — it respects standard cavity limits without forcing extra framing work. Renters and apartment owners should look at the Nova NV1 instead, since it avoids a full masonry recess. Anyone whose insurer is asking for a certified unit should go straight to the Chubbsafes Viper Size 50, and budget-first buyers land on the CMI Miniguard Size 2. If none of those fit, the Security Safes range covers the rest of the wall, home and cabinet safe lineup for 2026.
FAQ
What's the best wall safe cavity size for a home in 2026?
For a standard Australian stud wall, a unit sized to fit a single 450mm to 600mm bay — like the Guardall HV1 — is the safest bet in 2026. Anything larger usually means cutting into a second stud or going to a masonry recess.
Is a wall safe better than a floor safe for a rental apartment?
A smaller wall safe like the Nova NV1 suits rentals better than a floor safe because it avoids cutting concrete. Floor safes generally need permanent structural work that most leases won't allow.
How much wall cavity space do I need for a wall safe?
You need enough depth for the safe body plus clearance for the door to swing open once mounted. Standard 90mm stud walls fit compact units like the CMI Miniguard Size 2 or Guardall HV1 without extra framing.
Can a wall safe fit between standard wall studs?
Yes, most compact wall safes are sized to fit a single stud bay at 450mm or 600mm centres. Larger units like the Guardall HV3 may need a wider double-stud opening.
Do wall safes need to be fire rated?
Fire rating is optional on most wall safes and adds lining thickness that reduces usable cavity space. Choose it if you're storing irreplaceable documents alongside valuables.
What's the difference between a wall safe and a home safe?
A wall safe recesses into a stud cavity so only the door face is visible, while a general home safe usually sits freestanding on the floor or in a cupboard. Wall safes trade raw capacity for a discreet, space-saving install.
Should I get a digital lock or key lock for a wall safe?
A digital lock like the Secuguard SHS4E gives faster daily access but relies on battery power, while a key or combination lock has no battery to manage. Pick digital for convenience, mechanical for simplicity.
How is a wall safe installed into a stud wall?
Installation involves cutting an opening between studs, fixing the safe body to the stud frame with the supplied hardware, then finishing the wall around the door face. Check the step-by-step process before attempting it yourself.
One last thing
Measure your stud bay before you shop, not after — a tape measure against the wall in 2026 tells you more about which wall safe cavity size will actually work than any spec sheet does. The how to install a wall safe at home guide walks through the stud-finding and cutting steps before you commit to a unit.