Are window restrictors a legal requirement, and which type should you fit?

In England, Wales, Scotland and Northern Ireland, window restrictors are usually a risk-control measure rather than a blanket rental requirement. The important exception is Northern Ireland building work, where the safe-opening rule is not carved out of dwellings in the same way as England’s specific opening-limiter requirement.

Are window restrictors a legal requirement?

Window restrictors are not a general legal requirement for rented homes in England, Wales or Scotland, but Northern Ireland is different for new-build or altered dwellings because its dwelling carve-out removes only glazing manifestation, not the safe-opening duty. A common landlord-guidance shortcut is too broad here: dwellings are not wholly exempt from the Building Regulations 2010 in England; only Requirement K5.3 is excluded, because the legislation says, “Requirement K5.3 does not apply to dwellings.” England’s HHSRS still treats “Falling between levels where the difference in levels is 300 millimetres or more” as a housing hazard, Wales’ fitness rules include “Falling from one surface to another (including falling from height),” and Scotland’s repairing standard requires the house to be “reasonably fit for human habitation,” but none of those provisions says every rental must have window restrictors. So the practical UK answer is: not generally mandatory, but often expected where a window creates a child fall risk.

Where are window restrictors required?

Window restrictors are required where a specific building-control, licensing, Decent Homes or risk-assessment rule applies, with England’s new Decent Homes child-restrictor rule starting in 2035 rather than now. England’s policy statement says the new DHS will apply from 2035, and its window-safety criterion says homes must have “child-resistant window restrictors, which can be overridden by an adult, on all windows which present a fall risk for children.” Current England and Wales HHSRS guidance is not a direct fitting law, but it says “Catches which restrict the distance a window can be opened to 100mm should be fitted to windows above ground floor level to reduce the possibility of an accident involving a child.” Local HMO licences can be stricter: Redbridge, for example, requires habitable-room windows at first floor and above to be limited to 100mm and overrideable for escape. In Northern Ireland, regulation 97 alone is disapplied to dwellings, so safe-opening control can still matter in building work. Abodient can hold the HMO licence and its conditions against the property, which matters where a council writes a specific window-restrictor condition into that licence rather than relying on general housing law.

What types of window restrictor are there, and which is best for a rental?

The main rental choices are key-locking cable restrictors, folding or rigid restrictors, and child-safety-catch restrictors, and the best choice is the one that limits child access without making adult fire escape depend on a missing key. Government housing guidance for England and Wales says “Any opening limiter should be easy to over-ride by an adult in the event of fire,” while RoSPA’s advice, quoted by the National Child Mortality Database, says restrictors with a child-safety catch are best because they avoid “the complication of having to find keys in an emergency situation.” Key-locking cable products still dominate the lettings market because they are robust, familiar and commonly restrict opening to 100mm: Jackloc says its Pro-5 “allow[s] the window to be fully opened when required and to be restricted to 100mm opening when needed.” The trade-off is clear: keyed models are more secure against tampering, but child-safety-catch designs are usually better where emergency override matters.

Are there window restrictors that do not need drilling?

Yes, no-drill window restrictors exist, but UK housing law generally regulates the fall risk rather than prescribing whether the restrictor is drilled, screwed or adhesive-fixed. England’s HMO management rule, mirrored in Wales, requires safeguards for floor-level windows where needed, saying managers must “ensure that bars or other such safeguards as may be necessary are provided,” but it does not name a fixing method. Scotland’s repairing standard instead catches anything the landlord supplies as a fixture or fitting, requiring it to be “in a reasonable state of repair and in proper working order.” Northern Ireland’s housing hazard list includes “Falling between levels where the difference in levels is 300 millimetres or more,” again without saying adhesive or drilled. The product market does sell no-drilling options: BABYGO says its restrictor “fits with high-strength 3M™ adhesive and removes without lasting damage,” but landlords should be cautious where tamper resistance, frame material or manufacturer instructions point to screw-fixed restrictors.

How often should window restrictors be checked?

No UK housing statute sets a fixed inspection interval for window restrictors in private rented homes, so landlords should check them at routine inspections and follow the manufacturer’s service interval where one is supplied. The closest housing duties require safeguards or fitness, not a calendar: England’s HMO rule requires necessary window safeguards, Scotland requires landlord-provided fixtures and fittings to be in proper working order, and Northern Ireland lists the fall-between-levels hazard without an inspection timetable. Manufacturer instructions can be more precise than the law: Jackloc’s Pro-5 datasheet says to check the key lock and lubricate it “as necessary, or at six-month intervals (whichever is the shorter),” and shortens that to “every three months” in marine or heavily polluted environments. A sensible rental standard is therefore a documented check at each inspection, after any tenant report or window repair, and at least as often as the restrictor maker specifies.

Last reviewed August 2026.

Sources

• Building Regulations 2010 Schedule 1, Requirement K5.3 — “Requirement K5.3 does not apply to dwellings.” Source
• Housing Health and Safety Rating System Regulations 2005 Schedule 1 — “Falling between levels where the difference in levels is 300 millimetres or more.” Source
• Renting Homes (Fitness for Human Habitation) (Wales) Regulations 2022 Schedule — “Falling from one surface to another (including falling from height).” Source
• Housing (Scotland) Act 2006 section 13 — “(a)the house is wind and water tight and in all other respects reasonably fit for human habitation,” Source
• New Decent Homes Standard policy statement — “The new DHS will apply from 2035 (MEES implementation dates are set out below and vary by tenure) to both the social and private rented sectors, at which point regulation and enforcement against these standards by the Regulator of Social Housing and local authority housing teams will begin.” Source
• New Decent Homes Standard policy statement — “To meet this criterion, homes must also be equipped with child-resistant window restrictors, which can be overridden by an adult, on all windows which present a fall risk for children.” Source
• HHSRS Operating Guidance — “Catches which restrict the distance a window can be opened to 100mm should be fitted to windows above ground floor level to reduce the possibility of an accident involving a child.” Source
• Redbridge mandatory HMO licence conditions — “The licence holder shall ensure that all windows to habitable rooms in the HMO at first floor level and above are fitted with window restrictors that limit the opening of the main opening light of the window to 100mm and which can be over-ridden in the event of using the window as a means of escape in the event of fire.” Source
• Building Regulations (Northern Ireland) 2012 regulation 95 — “Regulation 97 shall not apply to glazing in a dwelling.” Source
• HHSRS Operating Guidance — “Any opening limiter should be easy to over-ride by an adult in the event of fire.” Source
• National Child Mortality Database window-safety notice — “They also recommend that restrictors incorporating a child safely catch are best (as this avoids the complication of having to find keys in an emergency situation).” Source
• Jackloc Pro-5 key-locking restrictor — “This key-operated lockable window restrictor provides the flexibility to allow the window to be fully opened when required and to be restricted to 100mm opening when needed.” Source
• Management of Houses in Multiple Occupation (England) Regulations 2006 regulation 4 — “(b)in relation to any window the sill of which is at or near floor level, ensure that bars or other such safeguards as may be necessary are provided to protect the occupiers against the danger of accidents which may be caused in connection with such windows.” Source
• Housing (Scotland) Act 2006 section 13 — “(d)any fixtures, fittings and appliances provided by the landlord under the tenancy are in a reasonable state of repair and in proper working order,” Source
• Housing Fitness Standard Regulations (Northern Ireland) 2019 Schedule — “21. Falling between levels where the difference in levels is 300 millimetres or more.” Source
• BABYGO window restrictor — “It fits with high-strength 3M™ adhesive and removes without lasting damage, which makes it suitable for rented homes and flats where drilling into frames is not an option.” Source
• Jackloc Pro-5 datasheet — “Frequently check that the key lock operates correctly and spray PTFE or other approved lubricant into the barrel lock as necessary, or at six-month intervals (whichever is the shorter).” Source
• Jackloc Pro-5 datasheet — “With locks located within a marine or heavily-polluted environment, this inspection interval should be shortened to every three months.” Source