First, think about the clearest path from the street to your home. Consider access from not only the front door but the garage and patio doors, as well.
Find out if you have access to a service entrance in addition to the main entrance.
Measure WIDTH of door opening from LEFT to RIGHT, and HEIGHT from TOP to BOTTOM. (If your entrance has a 2nd doorway, measure that as well.) Take into account: overhangs, light fixtures, and door handles. Include them in your measurements if they cannot be removed.
If you need to use an elevator, measure elevator door opening and the interior height, width, depth, and diagonal measurements. (For diagonal measurements, measure the bottom center of the door to the back ceiling.) Be aware of handrails and overhead lights.
Measure interior doors and hallways just as you would the front door. Take into account: decorative items, wall art, handrails, low/angled ceiling, fire extinguishers, sprinklers.
Measure width, ceiling height, and landings. Take into account: handrails and trim). Then measure ceiling in 3 different places:
- Bottom step to ceiling
- Landing to ceiling (measure width & depth)
- Top step to ceiling