Key Takeaways
- Commercial projects should generally budget a 10 to 20 percent contingency, higher than typical residential contingency percentages.
- Equipment, furniture, and permitting fees often sit outside a construction budget and need separate planning.
- Revenue loss during construction represents a real cost many business owners underestimate.
- A detailed, itemized budget prevents the most common commercial budgeting surprises.
Commercial construction projects generally warrant a 10 to 20 percent contingency budget, somewhat higher than typical residential contingency percentages, given the additional regulatory complexity and specialized systems many commercial buildouts involve. This page covers how to build a realistic commercial project budget, including costs business owners commonly overlook until they appear mid-project.
Why commercial contingency runs higher than residential
Commercial projects often involve more regulatory review, specialized mechanical systems, and
Building a complete budget, not just a construction estimate
Many business owners budget primarily around their construction contractor’s estimate without fully accounting for costs that sit outside that specific number. A complete commercial project budget should include the construction cost itself, equipment and furniture that many contracts do not cover, permitting and inspection fees, potential architectural or engineering fees, and, for certain project types, health department or licensing fees specific to the business. Our posts on restaurant buildout costs and medical and dental buildout costs both discuss how equipment costs specifically sit outside standard construction budgets for those business types.
Accounting for revenue loss during construction
A cost business owners frequently underestimate is lost revenue during the construction period itself, whether that means a business closed entirely during a renovation or reduced capacity during a phased buildout. This cost does not appear on any contractor’s invoice, but it represents a genuine financial impact that should factor into your overall project planning and timeline expectations. Discussing a realistic construction timeline honestly with your contractor, covered in our commercial construction pillar guide, helps you plan around this cost more accurately.
Landlord tenant improvement allowances
If your project involves a leased space, understanding your tenant improvement allowance, what it covers, and how disbursement works matters as much as understanding construction costs directly. A tenant improvement allowance that seems generous on paper may not fully cover your planned buildout once equipment, permitting, and design fees are factored in separately. Our office tenant improvement guide covers this consideration in more detail, though it applies broadly across commercial lease types.
Change orders and how they affect a commercial budget
Commercial projects, like residential ones, frequently generate change orders as unexpected conditions or evolving business needs arise during construction. Understanding how your specific contract handles change order pricing before construction begins, whether fixed-price or cost-plus, helps you anticipate how these changes will affect your overall budget. Our post on cost-plus versus fixed-price contracts covers this distinction in detail, and the same considerations apply to commercial projects.
Building your contingency into the initial budget presentation
Rather than treating contingency as an afterthought, build it explicitly into your initial budget planning and any presentation to lenders, partners, or landlords involved in financing the project. A budget that clearly accounts for a realistic contingency percentage demonstrates more thorough planning than one that presents only best-case construction numbers without acknowledging the likelihood of some unexpected costs.
Working with a contractor who provides detailed, itemized estimates
A commercial contractor who provides a detailed, itemized estimate, rather than a single lump-sum number, helps you understand exactly where contingency matters most for your specific project and where costs are more fixed and predictable. Start that conversation through the commercial services page.
Summary
Commercial projects generally warrant a 10 to 20 percent contingency budget, higher than typical residential projects, given the additional regulatory complexity and specialized systems many commercial buildouts involve. A complete budget should account for equipment, furniture, permitting fees, and lost revenue during construction, not just the construction contract itself. Understanding tenant improvement allowances and change order pricing structures before construction begins helps business owners anticipate how their budget may shift. Building contingency explicitly into initial planning, rather than treating it as an afterthought, produces a more realistic and defensible project budget. Start your commercial project with a detailed, itemized estimate through the commercial services page.
Frequently Asked Questions
How much contingency should a commercial project budget include?
Generally 10 to 20 percent, somewhat higher than typical residential contingency percentages, given the additional regulatory complexity and specialized systems many commercial buildouts involve, from health department requirements to electrical capacity issues in older buildings.
What costs sit outside a typical commercial construction estimate?
Equipment and furniture, permitting and inspection fees, architectural or engineering fees, and health department or licensing fees specific to certain business types often sit outside a standard construction contract and need separate budget planning.
Should I budget for lost revenue during commercial construction?
Yes. Lost revenue during a construction period, whether from a full closure or reduced capacity during a phased buildout, represents a genuine financial impact that does not appear on any contractor invoice but should factor into your overall project planning.
Does a tenant improvement allowance cover my full construction budget?
Not always. A tenant improvement allowance that seems generous on paper may not fully cover your planned buildout once equipment, permitting, and design fees are factored in separately, so understanding exactly what the allowance covers matters significantly.
How do change orders affect a commercial project budget?
This depends on your contract structure. Fixed-price contracts require formal change orders that adjust the total price, while cost-plus contracts add actual costs plus an agreed fee. Understanding which structure applies before construction begins helps you anticipate budget impacts.
