A hardware schedule makes a repair or sourcing conversation specific. Installation and disassembly are outside this guide.
A safe planning sequence
- Assign each door or cabinet an ID and photograph both visible faces plus the edge during normal safe operation.
- Record function and condition without forcing a mechanism.
- Measure only visible plate size, projection and accessible screw spacing; mark hidden dimensions for specialist verification.
- Note markings, finish color, wear and differences between similar pieces without assuming material.
- Ask first whether the existing hardware can be retained and serviced.
- Compare replacements by functional suitability, dimensional fit, condition, finish compatibility and return terms.
Common errors
- Buying by appearance alone
- Enlarging a mortise to fit a new lock
- Stripping hardware to a uniform shine
- Assuming salvage is automatically compatible
Stop and call a professional
- A locksmith or appropriate specialist should handle entry security, egress hardware, fire-rated assemblies, painted fasteners, drilling and disassembly.
Where AI helps—and where it does not
AI can compare verified product specifications. A visual match is only a research lead, never proof of compatibility.
Official guidance
- NPS Standards for Preservation (opens in a new tab)
- EPA: Lead-safe renovations for DIYers (opens in a new tab)
- EPA: Asbestos and home remodeling (opens in a new tab)
- City of Chicago: Building permits (opens in a new tab)
- City of Chicago: Work that does not require a permit (opens in a new tab)
This guide is general planning information. Building conditions and local requirements vary; confirm the project-specific permit and trade requirements before work begins.