Commercial Construction Contingency: How Much Should Owners Budget in Middle Tennessee?

A commercial construction budget should not be built around the assumption that every existing condition, material price, permit requirement, and design detail will unfold exactly as expected.

Even a well-planned project can encounter concealed conditions, design changes, material substitutions, code requirements, or owner-requested revisions after construction begins.

That is why commercial property owners and developers should establish a construction contingency before signing a contract or beginning work.

For many commercial projects in Middle Tennessee, a reasonable contingency may range from approximately 5% to 15% of the construction budget, depending on the type of project, the completeness of the plans, and the amount of uncertainty involved.

The correct amount is not the same for every project.

A ground-up commercial building constructed from completed documents has a different risk profile than the renovation of an older restaurant, medical office, church, or retail space where much of the existing building is concealed.

What Is a Commercial Construction Contingency?

A commercial construction contingency is money reserved to address costs that cannot be fully identified when the original construction budget is prepared.

It is not intended to be spent automatically.

Instead, it provides financial protection if conditions change or additional work becomes necessary.

A contingency may be carried by:

• The property owner

• The developer

• The general contractor

• The architect or design team

• A lender

• A combination of the parties

  
  

The contract and project budget should clearly identify who controls each contingency and what types of expenses it may cover.

An owner-controlled contingency is generally separate from the contractor’s contract amount unless the agreement specifically states otherwise.

How Much Construction Contingency Should an Owner Carry?

The right contingency depends largely on how much information is available when the construction budget is established.

5% Contingency

A contingency near 5% may be appropriate when:

• Construction documents are substantially complete

• Existing conditions have been thoroughly investigated

• The project is new construction on a well-understood site

• Major materials and equipment have already been selected

• Trade contractors have priced clearly defined scopes

• Permitting requirements have been confirmed

• The owner is unlikely to make significant changes

  
  

A 5% contingency may still be too low for renovations, phased projects, or work beginning before design completion.

7% to 10% Contingency

A contingency between approximately 7% and 10% is often more appropriate for typical commercial construction and tenant-improvement projects.

This range may be reasonable when:

• Plans are developed but not fully complete

• Some existing conditions remain concealed

• Material selections are still being finalized

• The project requires renovation of existing mechanical, electrical, or plumbing systems

• Permitting comments could affect the scope

• The owner may make minor changes during construction

• Some pricing is based on allowances

  
  

For many commercial buildouts in Middle Tennessee, this is the range owners should at least consider during early budgeting.

10% to 15% Contingency

A larger contingency may be appropriate when:

• The building is older

• Demolition has not been completed

• Existing utilities have not been verified

• The project involves a change of occupancy

• The building has crawlspaces, basements, or concealed structural conditions

• As-built plans are unavailable or unreliable

• Hazardous materials may be present

• The plans are conceptual or incomplete

• Construction must begin before all decisions are finalized

• The project involves extensive renovation

  
  

Older restaurant conversions, medical buildouts, church renovations, and adaptive-reuse projects commonly contain more uncertainty than straightforward new construction.

Beginning one of these projects with little or no contingency can create significant financial pressure once demolition begins.

Construction Contingency Is Not the Same as an Allowance

Contingencies and allowances are often confused, but they serve different purposes.

Allowance

An allowance is a placeholder for a known part of the project when the exact selection, quantity, or cost has not yet been finalized.

Examples include:

• Flooring

• Light fixtures

• Plumbing fixtures

• Appliances

• Cabinetry

• Signage

• Door hardware

• Landscaping

The work is expected to occur. The final cost simply has not been confirmed.

Contingency

A contingency is reserved for conditions or costs that may or may not occur.

Examples include:

• Concealed water damage

• Unforeseen structural repairs

• Existing utilities that differ from available drawings

• Additional code-required work

• Unanticipated subfloor repairs

• Material substitutions caused by availability

• Minor design coordination issues

A strong commercial construction budget should identify allowances and contingency separately.

Combining them into one number makes it difficult for the owner to understand what has actually been included.

Contingency Is Not Contractor Profit or General Conditions

Construction contingency should also be separated from the general contractor’s normal project costs.

General conditions may include:

• Site supervision

• Project management

• Temporary facilities

• Dumpsters

• Safety measures

• Progress cleaning

• Temporary power

• Site security

• Scheduling and coordination

• Administrative support

• Closeout and punch-list work

Contractor overhead and profit compensate the contractor for operating the company, assuming business risk, managing the work, and delivering the project.

Those costs should not be mistaken for contingency.

A properly structured budget may contain all of the following:

1. Direct construction costs

2. General conditions

3. Contractor overhead and profit

4. Allowances

5. Owner contingency

6. Design and engineering costs

7. Permit and utility fees

8. Furniture, fixtures, and equipment

9. Financing and lender costs

Owners should understand each category before evaluating whether a project is financially feasible.

What Does Construction Contingency Typically Cover?

The use of contingency should be documented and approved according to the project agreement.

Depending on the project, contingency may cover:

Concealed Existing Conditions

Renovation projects often expose conditions that could not be verified before demolition.

Examples include:

• Rotted framing

• Damaged subfloor

• Improper previous construction

• Abandoned utilities

• Inadequate electrical service

• Unrecorded plumbing

• Mold or moisture damage

• Structural deficiencies

Code and Inspection Requirements

An inspector or reviewing authority may identify requirements that were not fully addressed in the original documents.

These might involve:

• Accessibility

• Fire separation

• Egress

• Emergency lighting

• Fire alarm modifications

• Plumbing fixture counts

• Electrical upgrades

• Mechanical ventilation

• Structural reinforcement

A strong preconstruction process can reduce this risk, but it cannot eliminate every potential interpretation by local authorities.

Design Coordination

Commercial plans involve coordination among architectural, structural, mechanical, electrical, plumbing, civil, and specialty systems.

Conflicts between those documents may not become apparent until fabrication or construction begins.

Material and Equipment Changes

A specified item may become unavailable, experience a long lead time, or require substitution.

The replacement may cost more than the original product.

Owner-Requested Changes

Owners frequently refine their needs once they can physically see the project taking shape.

These changes may involve:

• Moving walls

• Adding outlets

• Changing finishes

• Upgrading fixtures

• Revising millwork

• Adding technology

• Modifying equipment layouts

Owner-requested scope changes should generally be tracked separately from unforeseen-condition contingency so the project team can identify why the budget changed.

Should Contingency Be Included in the Contractor’s Proposal?

There is no single correct structure.

The best approach depends on the contract and the owner’s reporting requirements.

Owner-Held Contingency

The owner keeps the contingency outside the construction contract and only authorizes its use when necessary.

This provides transparency and prevents unused contingency from being treated as part of the contractor’s earned contract amount.

Contractor-Held Contingency

The general contractor carries a defined contingency within the contract for specific construction risks.

The agreement should explain:

• What the contingency may be used for

• Who must approve its use

• How expenditures will be documented

• What happens to unused funds

• Whether markup applies

• Whether the amount is part of a guaranteed maximum price

Shared or Separate Contingencies

Larger projects may have multiple contingencies, such as:

• Design contingency

• Construction contingency

• Owner-change contingency

• Escalation contingency

• Contractor contingency

Separating these categories can help the owner understand where risk exists.

Does a Higher Contingency Mean the Estimate Is Inaccurate?

Not necessarily.

A contingency should reflect uncertainty, not a lack of effort.

A preliminary estimate created from conceptual plans naturally carries more uncertainty than a trade-supported budget based on completed construction documents.

An honest budget acknowledges what is not yet known.

A contractor who presents an artificially low number without discussing contingency may make the project appear affordable initially, but that does not mean the final cost will remain within that number.

Owners should evaluate:

• The completeness of the plans

• The assumptions behind the estimate

• The allowances included

• The exclusions

• The existing-condition investigation

• The pricing source

• The contractor’s qualifications

• The amount and purpose of contingency

The lowest initial estimate is not always the lowest final project cost.

How Preconstruction Can Reduce Contingency Risk

Contingency cannot eliminate uncertainty, but strong preconstruction can reduce it.

Commercial preconstruction may include:

• Existing-condition evaluations

• Site walks

• Constructability reviews

• Utility investigations

• Preliminary trade pricing

• Permit research

• Code analysis

• Long-lead-item identification

• Design coordination

• Value engineering

• Scope clarification

• Schedule development

The earlier the general contractor becomes involved, the more opportunity the team has to identify risk before construction begins.

This is especially important when evaluating an existing property or lease space. A building may appear suitable during a real-estate tour but still contain expensive limitations related to utilities, accessibility, structure, fire protection, grease waste, electrical service, mechanical capacity, or occupancy classification.

Commercial due diligence and preconstruction help convert unknown conditions into known budget items.

What Happens to Unused Contingency?

That depends on how the project agreement is written.

When the contingency is held by the owner, any unused amount simply remains with the owner.

When it is included in a guaranteed maximum price or construction contract, the agreement should state whether unused funds:

• Return to the owner

• Reduce the final contract value

• Remain part of the contractor’s compensation

• Are shared between the owner and contractor

• May be reassigned to approved upgrades

This should be resolved before the contract is signed.

Example Commercial Construction Budget

Assume a commercial renovation has an estimated construction cost of $750,000.

A simplified planning budget might look like:

Budget Category	Amount
Estimated construction cost	$750,000
Owner contingency at 10%	$75,000
Architecture and engineering	$55,000
Permits and testing	$15,000
Furniture, fixtures and equipment	$80,000
Total planning requirement	$975,000

The contractor’s construction proposal may still be $750,000.

The $975,000 represents the broader amount the owner may need to plan for—not necessarily the amount that will ultimately be spent.

This distinction is important when evaluating financing and project feasibility.

Questions Owners Should Ask About Contingency

Before beginning a commercial project, ask:

1. What percentage of contingency is recommended for this project?

2. What specific risks justify that amount?

3. Who controls the contingency?

4. Is contingency inside or outside the construction contract?

5. What documentation is required before it is used?

6. Are contractor overhead and profit applied to contingency expenditures?

7. What happens to unused funds?

8. Are owner-requested changes tracked separately?

9. Which costs are allowances rather than contingency?

10. How will contingency use be reported during construction?

Clear answers help prevent misunderstandings later.

Planning a Commercial Construction Budget in Middle Tennessee

Every commercial project contains some level of uncertainty.

The goal is not to predict every possible condition. The goal is to establish a realistic financial plan, investigate major risks early, and clearly define how unexpected costs will be handled.

Vision Building Group helps business owners, developers, franchise operators, and church leadership teams evaluate commercial projects throughout Middle Tennessee.

Our Construction Intelligence approach combines preconstruction, commercial due diligence, budgeting, constructability review, value engineering, and project planning to help owners make informed decisions before construction begins.

To discuss a commercial construction project in Nashville, Murfreesboro, Franklin, Brentwood, Columbia, or the surrounding Middle Tennessee area, contact Vision Building Group.