Often, the factors that derail future expansion are the ones nobody is talking about. Expansion does not fail dramatically at all at once; it fails because dozens of small decisions quietly remove future options. Here are five areas that sometimes go overlooked. Whether you're designing a greenfield or an expansion, make sure you've got these details covered.
Wastewater
Expanding food and beverage operations can mean a wide range of wastewater challenges.
New product lines introduce new ingredients, different cleaning processes, and higher-strength effluent, and the downstream impact on municipal infrastructure is surprisingly complex. A single oily, fatty, or water-soluble product line can disrupt or kill the microorganisms in a city's wastewater treatment system, potentially shutting it down.
Dennis Group’s Head of Sustainability and Site Search, Jacqueline Kull, has a lot of experience assessing wastewater risks during site selection and expansion planning and working directly with cities to resolve them. She notes, “if the municipality can’t handle the increased load, the cost of upgrading your facility’s wastewater treatment late in the project can be significant—sometimes over $10 million, even for low‑volume manufacturers.” Municipal improvements can take two to five years, she adds, so many expanding manufacturers install pretreatment on their own sites.
These implications underscore the importance of addressing wastewater requirements early in the design process. An initial check‑in with an environmental engineer can validate local capacity and determine whether pretreatment will be needed.
Centralized thermal utilities
Centralized thermal utilities such as steam, boilers, refrigeration and process heating and cooling are difficult to plan for future expansion because their constraints are easy to downplay early on. Air compressors and standalone water heaters can usually be added incrementally, but shared infrastructure is disruptive to modify once a facility is operational.
Oversizing these systems upfront may seem like the right move, but it introduces a delicate balance between planning for growth and overengineering. Systems that are too large struggle with turndown limitations, operate inefficiently at low loads, and require energy-wasting fixes just to function as intended. A more flexible approach is to oversize utility rooms, corridors, and access paths instead of the equipment itself, and to plan thermal utilities in modular phases.
Senior Partner Trent Moore highlighted a utilities design strategy for facilities planning phased plant expansions. Rather than installing an oversized header at the outset, the Dennis Group team can design the pipe rack system with space for multiple right-sized headers that are added as demand grows. A solid production forecast still plays an important role in right-sizing utilities at each phase.
Egress and fire‑rated wall construction
Egress and fire-rated wall construction may seem like minor early-stage details but overlooking them can quickly cause big problems. Fast, safe evacuation is critical in manufacturing environments, so exit spacing and the location of fire-rated wall assemblies deserve early attention.
For a moderate-hazard facility with a sprinkler system, the International Building Code generally limits exit travel distances to 250 feet, with the ability to stretch that to 400 feet under the right conditions, such as higher ceilings and suitable layouts. As facilities expand, the distances to exits also grow and what once worked can suddenly fall out of compliance.
Higher clear ceiling heights, well-placed fire-rated corridors and fire-rated building separations can all provide flexibility by effectively "resetting" travel distances as the building grows. Investing in higher ceilings or extra fire-rated walls for future needs can feel costly upfront, but the added cost is minimal compared to retrofitting an active facility later.
Stormwater
Though stormwater is underground, it can quietly become one of the biggest barriers to future expansion. It is often designed to the bare minimum required for an initial building footprint, with little consideration for what comes next.
As facilities expand, that early decision becomes a constraint. Added roof area increases runoff and undersized storm lines can force new tie-ins, pipe replacements, or drainage rerouting, which may require excavation near active buildings, complex grading changes and additional permitting. Stormwater is especially expensive to fix after the fact because it affects site layout, elevation and regulatory compliance all at once.
A more resilient approach is to plan stormwater infrastructure as a backbone for future growth. This can include installing a large-diameter stormwater main early to accommodate expanded roof areas over time. Interior roof drains can also route water vertically into the main, avoiding exterior downspouts that may need to be relocated or redesigned as the building expands.
Dock loading positions
Dock loading positions affect everything from site grading and foundation walls to truck circulation, safety and business continuity. When dock locations and future capacity aren't considered early, adding new docks later can become highly disruptive.
Cutting new dock openings through exterior walls not designed for them often requires new foundations, structural reinforcement and slab replacement, which is expensive, time-consuming work that is difficult to perform in an active facility. Expansion‑driven construction can also interfere with truck traffic, forcing vehicles through construction zones, slowing operations and progress and creating potential safety concerns. Pausing shipping and receiving is rarely an option and while temporary docks may be a workable solution for a time, they’re often impractical or fail to meet code requirements.
Chris Siart, Senior Partner and Building Systems Lead, highlighted the benefit of designing "plugged knockouts," which allow exterior walls and slabs to accommodate future dock loads, turning what would be a costly redesign into controlled, predictable construction. He also noted the importance of planning dock locations and truck access so future building expansions occur away from active docks, allowing shipping and receiving to continue uninterrupted.
Small choices, big impact
Expandability isn't defined by any single big decision: it's shaped by dozens of small, early choices that either preserve or limit future options. Every project team balances flexibility differently depending on the clarity of a client's future plans, but the earlier we surface these conversations, the better the outcomes. Thoughtful planning isn't about avoiding every challenge; it's about ensuring the facility has room to evolve long after construction is complete.
