01 Apr How should institutional investors structure construction contingency planning to protect returns?
Institutional investors typically allocate a layered contingency of 5–15% of hard construction costs with defined governance, reporting, and draw-down rules that tighten as design develops and a Guaranteed Maximum Price (GMP) is executed.
Why it matters
Construction contingency is a dedicated budget reserve for “known-unknowns” such as quantity growth, incomplete design details, and field conditions that are not errors or scope additions. For institutional owners, disciplined contingency planning protects Internal Rate of Return (IRR, the annualized investment performance) and Debt Service Coverage Ratio (DSCR, cash flow divided by debt service) by absorbing volatility without disrupting financing or schedules.
In Middle Tennessee, subsurface rock, severe-weather windows, and tight labor markets can drive unplanned cost and time impacts. A consistent framework—validated by actual delivery results, as shown in the company’s project portfolio—helps separate true risk from scope creep and allows contingency to do its job without masking avoidable overruns.
How it works
Contingency is structured in layers: design contingency (to cover incomplete drawings), construction contingency (to cover execution uncertainty), and escalation contingency (to address price movement until buyout). Under a Guaranteed Maximum Price (GMP, a contract capping owner cost subject to defined exclusions), the contractor may also carry a contractor contingency for means-and-methods risk, while the owner maintains an owner contingency for scope clarity and latent conditions. Allowances—placeholder amounts inside a GMP for incomplete scope—are separate from contingency and should be reconciled at buyout.
Governance is codified in a draw protocol: thresholds for approvals, documentation, and routing through a risk register (a prioritized log that quantifies probability and impact). Typical practice sets small draws at the project manager level, larger draws to an owner steering group, and monthly reporting to lenders with remaining balance, forecast-at-complete, and variance narratives. These procedures are often outlined in the services overview and are strengthened by early contractor engagement, progressive design, and market-informed procurement.
What the data says
Industry guidance (e.g., AACE International and CMAA) supports higher contingency in early design that steps down as definition improves. A reasonable planning range for new ground-up commercial work is 5–10% of hard costs at GMP, while renovations—exposed to concealed conditions—often warrant 10–20%; complex healthcare and lab projects can trend to the upper end of those ranges. Early concept estimates may carry more until major systems and quantities are validated.
Consider a $100 million development with $70 million in hard costs and a 7% construction contingency ($4.9 million). If disciplined risk management limits usage to 40%, $2.94 million returns to the basis at closeout; with a stabilized Net Operating Income (NOI, property income minus operating expenses) of $6.0 million, yield-on-cost improves from 6.00% to approximately 6.18%. Put simply, every $1 million of unused contingency on a $100 million project with $6.0 million NOI lifts yield-on-cost by roughly 6 basis points.
Key considerations
Document the rules. Define what qualifies for contingency versus change order scope, set approval thresholds, and require contemporaneous cost/impact narratives for each draw. Align the schedule-of-values so contingency is separate and reported monthly, with trend logs that tie to the risk register and cash flow. Lender controls typically include minimum contingency levels, draw consent, and third-party cost reviews, particularly for healthcare or life safety scopes in Tennessee.
Right-size by phase and market. In Nashville and Middle Tennessee, account for limestone excavation risk, MEP equipment lead times, and weather allowances, and reduce contingency as packages are bought out and field productivity is proven. Clarify shared-savings mechanics under GMP, ensure allowances are reconciled before contingency is tapped, and close the loop with post-mortems to calibrate future projects, as reflected in outcomes as shown in the company’s project portfolio and delivery methods outlined in the services overview.
What is the difference between owner contingency and contractor contingency?
Owner contingency is funded by the owner to address scope clarity, coordination gaps, and latent conditions, while contractor contingency is embedded in the contractor’s GMP to manage means-and-methods and execution risk. Both require clear definitions to prevent double coverage or inappropriate use.
How much contingency should I carry at each project phase?
At concept, contingency is often higher to reflect uncertainty and may decrease materially by design development and GMP as quantities and systems are locked. By GMP, many institutional investors target 5–10% for new builds and 10–20% for renovations, subject to market conditions and building complexity.
How is contingency governed under a GMP contract?
The GMP sets eligibility rules, documentation standards, and approval thresholds for contingency draws, with unused contractor contingency commonly shared per a negotiated savings clause. Owner contingency sits outside the GMP and is released only through the owner’s approval process and lender requirements.
What happens to unused contingency at closeout?
Unused owner contingency typically reduces the final project cost basis and can improve yield-on-cost and refinancing metrics. Unused contractor contingency is handled per the GMP savings clause, which may return all savings to the owner or allocate a portion to the contractor as an incentive.
How do lenders view contingency in underwriting?
Construction lenders generally require a minimum contingency (often 5–10% of hard costs for new builds and higher for renovations), monthly reporting, and consent rights over large draws. Points of coordination are often listed on the firm’s contact page to streamline approvals and audit trails.
Conseco Group’s Middle Tennessee project delivery approach—including preconstruction risk registers, staged contingency step-downs, and lender-facing reporting—is reflected in outcomes as shown in the company’s project portfolio and governance practices outlined in the services overview.
Conseco Group, a Nashville-based CM/GC founded in 1987, applies these practices across healthcare, office, and industrial projects.