Hide Under-Stairs Doors (Magnetic Latches)
A concealed under-stairs door can use a magnetic catch to stay closed without a visible knob, but the catch is only one part of a safe installation. First check local code, stair framing, fire protection, and service access. Then frame a suitable opening, fit the door to the hardware instructions, and test it after finishing.
A tidy concealed door can make an under-stairs space useful without adding a prominent door to a small room. That can help a home feel more orderly, though no storage feature guarantees higher resale value. Buyers and inspectors may value sound, code-compliant work; a poorly built or inaccessible opening can raise concerns instead.
I plan these projects from the constraints inward: what must remain protected, what must stay reachable, and where a door can open safely. There is no universal code standard for a “hidden door.” Local rules and the details of the existing stair assembly matter.
Planning: Code, Structure, and Services
Planning means checking the stair assembly, proposed opening, utilities, and local code before cutting or covering anything. A magnetic catch does not make an opening safe or code-compliant by itself. The goal is to conceal access while preserving required protection and leaving building services reachable.
Start by identifying the adopted code edition and any local amendments. The 2021 International Residential Code (IRC) is a model code, not automatically the rule in every location. Ask your building department whether a permit or inspection is required, especially if work could affect framing, a rated assembly, or required egress.
Under 2021 IRC R302.7, an enclosed, accessible space beneath stairs generally needs ½-inch gypsum board on the enclosed side of the under-stair surface and side walls. Confirm what applies to your home before planning a flush finish. Do not remove required gypsum board just to make the door blend in.
Map pipes, wiring, shutoffs, junction boxes, and other services before opening a wall. NEC 314.29 (2023 model code) requires covered junction boxes to remain accessible without removing building finish or structure. A disguised door may provide access only if it can be opened as needed; a fixed panel or blocked door does not.
- Photograph the stair area and mark visible outlets, switches, pipes, and access points.
- Check both sides of the proposed opening for framing and utilities.
- Confirm whether the stair enclosure or nearby wall has a required fire-protection role.
- Ask a qualified professional to assess uncertain structural or fire-rated conditions.
Key next step: Do not cut until you know what is behind the finish and which protections must remain.
Access and Stair Clearances
A usable concealed door must not narrow a required stair path or interfere with safe movement. Measure the stair and its landings before choosing the opening location or swing. The door, trim, and frame all count: a flush-looking finish is not acceptable if it intrudes into a required clearance.
Under 2021 IRC R311.7.1, stairway clear width is generally at least 36 inches above handrail height. R311.7.2 generally requires at least 6 feet 8 inches of headroom, measured vertically from the line connecting the tread nosings. Check the adopted code and site conditions, and make sure the door and trim do not intrude into those clearances.
Keep stair geometry unchanged. IRC R311.7.5.1 generally limits risers to 7¾ inches, with no more than ⅜ inch of variation within a flight. Do not cut or notch a stringer, joist, or other structural member to fit an opening unless an approved design allows it.
Plan how the leaf will move. A door that swings into a landing, blocks circulation, or makes a shutoff hard to reach defeats the purpose. Consider a suitable swing direction or a different opening location, then confirm it works with the finished door and concealed pull.
| Check | Model-code reference | What to verify |
|---|---|---|
| Stair width | IRC R311.7.1 | Generally 36 inches minimum above handrail height |
| Headroom | IRC R311.7.2 | Generally 6 feet 8 inches from the tread-nosing line |
| Risers | IRC R311.7.5.1 | Generally 7¾ inches maximum; ⅜-inch maximum variation |
| Junction-box access | NEC 314.29 | Access without removing finish or structure |
Key next step: Mark the full swing and trim outline on site, then recheck width, headroom, and landing access.
Framing, Protection, and Magnetic-Latch Installation
A magnetic catch is a small device that uses a magnet and a matching strike plate to hold a door closed. Its pull strength, required gap, and mounting details vary by product. The frame must support the catch and keep the door aligned; drywall alone is not a dependable mounting base.
Set the opening and frame it
Locate the opening only after checking the framing and services. Measure the intended leaf and frame, then follow the door and hardware instructions for clearances. Do not assume a standard gap or catch position: use the selected manufacturer’s installation data.
Frame the opening without cutting structural members unless an approved plan directs the work. Provide a solid, aligned mounting point for the catch and strike. Keep required gypsum protection continuous around the enclosure as applicable; the access door must not become a reason to omit required protection.
Fit the leaf and catch
Hang the door so it moves freely and sits in line with the surrounding finish. Install the magnetic catch and strike where the manufacturer specifies. The strike must meet the magnet squarely when the door closes. If the gap is too wide or alignment is off, the catch may not hold as intended.
A magnetic catch holds a door closed; it does not necessarily provide a way to open it. Add a suitable concealed pull, push-release mechanism, or other compatible opening method. Test that release before finishing, and make sure someone can open the door without damaging the wall or finish.
Do not treat a magnetic catch as a fire-rated latch, security lock, or substitute for required protection. If the opening is part of a rated assembly, stop and get guidance from the local authority or a qualified professional before changing it.
Key next step: Select the door and catch as a system, then follow their instructions for fit, mounting, and release.
Verification, Operation, and Maintenance
Verification means testing the finished door as people will use it, not only checking that the magnet attracts the strike. Confirm that the leaf opens, closes, and releases without binding, and that the concealed finish does not hide required service access. Recheck stair clearances after trim and hardware are installed.
Test the door with the final finish in place. Open and close it several times, check that it latches consistently, and confirm the concealed pull is easy to find and use. Look for rubbing, uneven gaps, loose hardware, or a strike plate that shifts when the door closes.
Recheck any service stored behind the door. A shutoff, junction box, or other required access point must remain reachable without removing finish or structure. If a hidden panel makes routine access confusing, label the location discreetly where appropriate and ensure household members know how it opens.
Inspect the catch and hinges if the door begins to sag, miss the strike, or release too easily. Adjust only within the hardware maker’s instructions. If the frame has moved or the door binds, find the cause rather than forcing the leaf.
Key next step: Keep the catch instructions and any permit or inspection records with your home documents.
Installation Examples and Design Choices
These examples are planning scenarios, not claims about inspected projects or guaranteed code outcomes. They show how the opening location and door use can change the hardware choice. In each case, confirm framing, local rules, and product instructions before work begins.
| Scenario | Main concern | Practical direction |
|---|---|---|
| Hallway stair with a small storage opening | Door swing could narrow circulation | Test the swing and trim against the actual clear path before framing |
| Utility space beneath stairs | Shutoff or junction box must stay reachable | Keep the access door operable and do not conceal the service behind fixed finish |
| Finished stair enclosure | Required gypsum protection could be interrupted | Confirm the applicable protection detail before selecting the door and finish |
In the hallway example, I would first mark the proposed leaf’s swing on the floor. If it enters the landing or required path, I would reconsider the location or opening method before buying hardware. A strong magnet cannot solve a clearance problem.
For the utility-space example, I would check that the door opens far enough for the service task and that the catch releases without special tools. For the finished enclosure, I would confirm the applicable gypsum-board requirement before matching the door to the surrounding surface. The layout decision comes before the concealed finish.
Frequently Asked Questions
These answers cover common decisions about concealed under-stairs doors and magnetic catches. Code requirements can differ by location and building type, so use the model-code references as a starting point, not a substitute for checking the rules adopted where you live.
Will a magnetic catch hold an under-stairs door securely?
A magnetic catch can hold a suitable door closed when the catch, strike, door weight, and alignment match the product’s limits. Pull ratings are product-specific, not code-wide. It is not a security lock or a fire-rated latch, and it should not replace required protection.
How much space should I leave between the door and frame?
Use the clearance specified by the door and hardware manufacturers. There is no single code-wide gap for all magnetic catches. A gap that is too large or uneven can affect latching, so check the fit with the actual door, frame, and finish before final installation.
Can I put a hidden door anywhere beneath the stairs?
No. The opening must avoid structural damage, preserve required protection, and maintain stair clearances. It also must not block a landing, circulation path, or required service access. Check framing and utilities first, and ask the local building department about applicable rules.
Does the catch need a concealed pull?
The catch needs a compatible way to release the door. Depending on the product, that may be a concealed pull, push-release feature, or another opening method. Choose and test the release before finishing so the door can be opened without prying or damaging the wall.
Can I cover a junction box behind a concealed door?
A door may provide access only if it can be opened to reach the box without removing building finish or structure. NEC 314.29 (2023 model code) requires covered junction boxes to remain accessible. Confirm local requirements, and do not make the door fixed or difficult to release.
Does the magnetic catch provide fire protection?
No. A magnetic catch is not a substitute for required gypsum protection or a rated latch. Under 2021 IRC R302.7, an enclosed accessible under-stair space generally requires ½-inch gypsum board on specified surfaces. Confirm local rules and get expert guidance if the assembly is rated.
Can I cut a stair stringer to make the opening larger?
Do not cut or notch a stringer, joist, or other structural member to create an opening without an approved design. Altering stair geometry can affect safety and code compliance. Have a qualified professional assess the framing and any proposed structural change before work starts.
What should I test after installation?
With the final finish installed, check that the door opens and closes freely, latches every time, releases as intended, and does not intrude into stair clearances. Confirm that required services remain reachable. If the leaf binds or misses the strike, correct the cause instead of forcing it.
(This article was written by one of our staff writers, Robert Kensington. Visit our Meet the Team page.)
