A measured sketch can expose missing information and test furniture arrangements. Fabrication and construction still require field verification.
A safe planning sequence
- Sketch the outline and mark doors, windows, fireplaces, radiators, built-ins and visible service fixtures.
- Choose one corner as the start for each wall and record overall length plus distances to openings.
- Use one measurement convention for casing or opening edges and write it on the sheet.
- Add accessible widths, trim projections and sill heights; label inaccessible dimensions “not measured.”
- Check wall segments against the overall dimension and remeasure discrepancies rather than forcing a rectangle.
- Copy the drawing before testing furniture and storage, and label both sheets “planning only; field verification required.”
Common errors
- Ordering millwork from the sketch
- Rounding every dimension
- Assuming repeated windows match
- Using a phone scan as the sole record
Stop and call a professional
- Stop at sagging floors, proposed wall removals, stair changes, inaccessible areas or service work. The exercise does not establish structural capacity, code compliance or concealed conditions.
Where AI helps—and where it does not
AI can organize typed dimensions and flag missing measurements. Any diagram it makes must be checked against the original notes.
Official guidance
- NPS Preservation Brief 18: Historic Interiors (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.