Multi-family window replacement is a logistics problem more than a construction one. Standardize the product across all units, phase by stack or by floor, work to the lease notice period, and never leave an opening open in an occupied unit.
Apartment building window projects fail on coordination far more often than on construction. The windows are straightforward. Getting access to forty occupied units on a schedule is not.
Here is how we plan them.
The planning sequence
- Survey every opening and build a schedule by unit, noting sizes, types and any that differ from the building standard.
- Standardize the product across the whole building so parts, glass and screens are interchangeable forever.
- Confirm the lease notice requirement for entry, which governs the whole schedule.
- Identify vacant units and schedule those first, which builds momentum and proves the process.
- Phase by stack or by floor rather than jumping around, which keeps staging efficient.
- Determine access requirements above the second floor: lift, swing stage or interior-only installation.
- Establish a daily communication routine with property management.
- Plan for the units that will refuse access on the scheduled day, because some always do.
Phasing options
| Approach | Best for | Trade-off |
|---|---|---|
| Vacant units first | Buildings with turnover | Timeline depends on vacancy |
| By stack, vertical | Lift or scaffold access | Equipment stays in place longer |
| By floor, horizontal | Interior access buildings | Simplest tenant communication |
| By elevation | Exterior-driven work | Crosses many units per phase |
| Worst-first | Limited budget, multi-year | Building looks uneven during the interim |
| Whole building, compressed | Repositioning or lease-up | Highest disruption, lowest unit cost |
Standardization is the long-term saving
The decision that saves the most money over a building's life is not which window you buy, it is buying the same one for every unit. Ten years from now, a broken sash in unit 3B is a part number you already know, a glass size you have replaced before, and a screen that fits three other openings. A building with four different window products from four different projects is a maintenance problem forever, because every service call starts with identification. Where openings genuinely differ in size, keep the same product line and the same hardware and simply vary the dimensions. The unit cost difference of standardizing is small. The service cost difference is not.
Budgeting realistically
Per-unit costs in multi-family are usually lower than single family for the same window, because mobilization is spread across many openings and the work is repetitive. What adds cost is access above the second floor, coordination overhead, and the units that need rescheduling. Build ten to fifteen percent of schedule contingency for access failures, because in any building of size some tenants will not be home, will refuse entry, or will have furniture blocking every window despite notice. A schedule with no slack in it will slip and the slip will be blamed on the contractor rather than on the plan.
Ranges reflect typical Capital Region projects and are for planning only. Every Sundog quote is written, itemized, and free.
Frequently asked questions
How do you replace windows in an occupied apartment building?
Unit by unit, working to whatever notice period the leases require, with each unit typically taking a few hours. No opening is ever left open. We coordinate through property management, provide a phase schedule, and plan around the units that will need rescheduling.
How long does a multi-family window project take?
It depends almost entirely on access rather than on window count. A twenty unit building with interior access and cooperative tenants can move quickly. The same building requiring a lift for upper floors, or with a high rate of missed access appointments, takes considerably longer. Build schedule contingency in.
Should every unit get the same windows?
Yes, and it is the single most valuable decision in the project. Standardizing means that in ten years a broken sash is a part number you already know and a glass size you have replaced before. Buildings with several different window products from several different projects are a maintenance burden forever.
Can the project be phased across multiple years?
Yes, and many owners do it that way. The sensible order is worst-first: failed glass, north and west elevations, and any unit with a code issue such as an inadequate bedroom egress opening. Keep the same product across phases so standardization is preserved.
Do you handle tenant communication?
We work through property management rather than contacting tenants directly, and we provide the schedule, access requirements and daily updates that management needs to communicate. Notice requirements come from the leases, so management owns that piece and we build the schedule around it.
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