What the slab and framing need
Plano requires a Texas-registered engineer to design and seal every foundation and any addition to an existing post-tension foundation, and its addition and alteration checklist asks for engineered second-floor joist framing plans where they apply. Whether cutting an elevator pit into an existing slab counts as that kind of foundation work is a question for the engineer and Plano Building Inspections before the design is fixed. Where a pit is a problem, through-the-floor home lifts avoid one.
Pit or pitless equipment
A standard residential elevator needs a pit below the lowest landing so the cab floor stops level with the room. Some models are made for a shallow pit, and others need no pit and accept a small step or ramp into the cab. Post-tension slabs carry steel tendons held under high tension, so their positions have to be located before anyone cuts concrete. Vacuum elevators and through-the-floor lifts avoid the pit altogether.
Cutting the second floor
Every elevator or lift needs an opening in the upper floor. Cutting joists means adding headers to carry the load around the opening, and the size and direction of the joists decide how much work that takes. The opening is drawn on the engineered framing plan before anyone cuts it.
Permits and the Texas inspection
A retrofit elevator goes through a Plano building permit like any alteration, and the city’s 2024 residential code points to ASME A17.1 Section 5.3 for the hoistway enclosure and landing doors. A registered contractor should pull the permit; the city warns homeowners against contractors who ask them to pull it themselves. After installation, a registered elevator inspector inspects the elevator and gives you a copy of the report, which the city can ask for before it issues a certificate of occupancy for the installation. At handover you also receive written instructions on use, safety and maintenance.
Checking an older elevator already in the house
A house sometimes comes with an elevator already in it. If it went in before January 1, 2004, it predates the Texas inspection rule for single-family homes, so there may be no inspection report at all. Federal safety regulators warn that the gap between the landing door and the cab door or gate should be no more than 4 inches deep, because a child can be trapped in a deeper one, and they point to space guards or electronic monitoring as fixes. A registered elevator inspector can check an existing unit at the owner’s request. We install new equipment and do not offer repairs or service contracts.
If the house cannot spare a closet stack, compare pneumatic vacuum elevators, which need no hoistway. Every option is on the Plano Home Elevators home page.