The threat profile. Opportunistic, fast (under 2 minutes on site), tool-light. Most shed thieves carry a bolt cutter and a flathead screwdriver. They're targeting bikes, power tools, and recently lawnmowers. Security spec needs to take you past 2 minutes. That's the whole game.
Locks that actually work
Closed-shackle padlocks (50 mm or larger, CEN-rated 4 minimum) are the entry-level spec. Squire and ABUS are the realistic brands to look for: €25-€50 for a decent unit. Open-shackle padlocks fail to bolt cutters in seconds. Walk past anything plastic-coated or branded "garden": they're decorative.
| Lock type | Cost | What it stops |
|---|---|---|
| Open-shackle padlock | €8-€15 | Almost nothing: bolt-cutter target |
| Closed-shackle 50 mm CEN-4 | €25-€50 | Casual attackers, smaller bolt cutters |
| Squire / ABUS Sold-Secure Gold | €60-€110 | Professional attack tools, sustained attack |
| Disc detainer / round-body | €40-€80 | Picking, casual drilling |
The hasp and staple: most overlooked part
Most cheap shed hasps screw into 12 mm cladding with exposed screws. The screws unscrew in 30 seconds. The fix: a through-bolted hasp on a reinforced backplate, with security screws (not standard wood screws). €25-€50, transformative. Many decent locks fail because the hasp they're attached to comes off.
Door reinforcement
Standard shed doors are thin (typically 16 mm timber). A 4 mm steel cover plate over the lock area, or a Sold Secure-rated shed-door reinforcement kit (€40-€80), turns a soft door into a real door. Worth it if you're storing bikes worth €1,000+ each.
Anchoring: the second layer
Once the shed is locked properly, the next question is what's inside. A Sold Secure ground anchor (€50-€90) bolted to a concrete base, with a heavy-duty chain through bike frames or a steel cage around power tools, is the second layer. The shed becomes the outer skin. The anchor stops the contents walking even if the shed is breached.
A ground anchor is meaningless on a gravel-and-bearer base. It bolts to concrete only. If you want serious in-shed security, plan a concrete pad. See foundations guide.
Window security
Most stolen-from sheds were entered via the window, not the door. Two simple fixes:
- Polycarbonate not glass: costs slightly more new, dramatically harder to break in.
- Internal grille: €30 in materials (welded mesh + fixings), 30 minutes to install. Visible from outside, signals "not worth it".
If your shed is going in a publicly visible spot, consider a no-window spec. The trade-off is darkness inside; LED strip lighting fixes that for €20.
Lighting and visibility
A PIR-activated 800-lumen security light is €25-€40 and is the cheapest single intervention. Mount it pointed at the shed door from a position where it triggers when someone approaches. Visibility from the house is the next-cheapest preventive measure. Position the shed window or door so the door area is overseen by a kitchen or living-room window.
Alarms: when worth it
Basic battery shed alarms (€20-€40) are loud, deter casual attackers, and are ignored by determined ones. WiFi-linked alarms that ping your phone (€80-€150) are different: they trigger immediate action and cause panic. Worth it if you're storing €2k+ of bikes or tools. Below that, the closed-shackle + reinforced hasp + ground anchor + PIR light combination is more cost-effective.
Insurance: what most home policies need from you
- Approved lock standards: most Irish home insurers require Sold Secure Gold for bikes over €750. Confirm with your insurer.
- Evidence: photos of locks, anchor, serial numbers of stored items.
- Proof shed was locked at time of theft (forced-entry evidence).
Without these, claims get refused or settled below replacement value.
The €150 spec that does the job
For a typical domestic shed storing bikes and a few power tools:
- Closed-shackle 50 mm padlock: €25
- Through-bolted hasp + security screws: €30
- Ground anchor + chain: €70
- PIR security light: €25
Total: €150. Takes a 2-minute opportunistic theft from "easy" to "not worth it". For most homeowners, that's the entire security investment needed.
What we wouldn't bother with
- Decorative "shed alarms" sold in B&Q: most are siren-only and battery-flat by year 2.
- "Shed safes" bolted to floors: better to anchor the items themselves.
- Multiple weak locks instead of one strong one. Bolt cutters cut as many as you fit.