Construction to Permanent Loans: The Complete Guide for Small Business Owners

Building a commercial property from the ground up is one of the most significant investments a small or medium-sized business can make. Whether you're constructing a medical office, a retail strip center, or a warehouse, the financing process can feel overwhelming — especially when it involves two separate loan phases. That's where a construction to permanent loan comes in.

This guide breaks down exactly how these loans work, what they cost, who qualifies, and how to use them strategically as part of a broader commercial real estate financing plan.

What Is a Construction to Permanent Loan?

A construction to permanent loan — sometimes called a C-to-P loan or a one-time-close construction loan — combines two financing stages into a single lending transaction.

Phase 1: The Construction Phase During this period, the lender releases funds in scheduled draws as your contractor completes specific milestones. You typically pay interest only on the funds drawn down, not on the full loan amount. This phase usually lasts 12 to 24 months.

Phase 2: The Permanent Phase Once construction is complete and the property passes its final inspection, the loan automatically converts into a standard long-term commercial mortgage. You begin making full principal and interest payments on a fixed amortization schedule — often 20 to 25 years.

The key advantage is that you close once, pay one set of closing costs, and avoid the risk and expense of refinancing from a construction loan into a separate permanent mortgage.

How Construction to Permanent Loans Compare to Bridge Loans

Both construction to permanent loans and bridge loans serve as transitional financing tools in commercial real estate, which is why they're often discussed together.

A bridge loan is a short-term loan — typically 6 to 24 months — used to "bridge" a gap between an immediate capital need and a longer-term financing solution. For example, an investor might use bridge funding to acquire a distressed property quickly, stabilize it, and then refinance into permanent financing. For a deeper look at how that process works across different property types, see our guide to bridge loans for commercial properties.

A construction to permanent loan, by contrast, is purpose-built for ground-up development. Rather than bridging to a future refinance, it eliminates that second transaction entirely. Think of it this way:

  • Bridge loan: acquire now, refinance later
  • Construction to permanent loan: build now, convert automatically

For business owners planning new construction, the C-to-P structure typically offers better rate certainty and lower total transaction costs than using a standalone construction loan followed by a bridge and then permanent financing.

Real Numbers: What Does a Construction to Permanent Loan Cost?

Let's look at a practical example.

Scenario: A regional physical therapy group wants to build a 6,000-square-foot medical office in suburban Atlanta. Total project cost: $1.8 million.

  • Loan amount: $1.44 million (80% LTC — loan-to-cost)
  • Borrower equity injection: $360,000 (20%)
  • Construction phase: 18 months, interest-only draws
  • Permanent phase rate: Prime + 2.50% (~9.25% APR based on current WSJ Prime Rate of 6.75%)
  • Amortization: 25 years
  • Estimated permanent phase monthly payment: approximately $13,100

During the construction phase, if the borrower draws an average of $900,000 over 18 months, monthly interest payments would run approximately $6,900 — significantly lower than full debt service, which helps preserve operating cash flow while the building is completed.

Who Qualifies for a Construction to Permanent Loan?

Lenders evaluate several factors when underwriting a C-to-P loan:

1. Creditworthiness

Most commercial lenders require a minimum business credit profile and personal guarantor credit scores in the 680–720+ range. Strong cash flow history and clean tax returns for the past two to three years are essential.

2. Project Feasibility

The lender will review your construction budget, contractor qualifications, architectural plans, and timeline. Experienced general contractors with verifiable track records are strongly preferred.

3. Equity and Loan-to-Cost Ratio

Lenders typically cap C-to-P loans at 75%–85% of total project cost (land + hard costs + soft costs). The stronger your equity position, the better your rate and terms.

4. Debt Service Coverage

Once the property is complete, lenders want to see that projected income — whether from your own occupancy or rental tenants — covers debt service by at least 1.20x to 1.25x.

5. Owner-Occupied vs. Investment Property

Business owners who will occupy at least 51% of the finished space often access more favorable terms and may qualify for SBA-backed financing. The SBA 504 loan program is specifically designed for owner-occupied commercial real estate and can be layered with construction financing for eligible borrowers.

SBA Financing and Construction Projects

For eligible small businesses, SBA loan programs can work alongside or within a construction to permanent structure.

The SBA 504 program pairs a conventional first mortgage (typically 50% of project cost) with an SBA-backed debenture (up to 40%) and a borrower equity contribution (as low as 10%). This structure is well-suited to owner-occupied construction projects and can lower the effective blended interest rate compared to conventional-only financing.

Standard SBA 7(a) Express loans can also be used for real estate construction, with SBA guarantees of up to 85% on loans of $150,000 or less and up to 75% on loans above that threshold. For more detail on current program rules, visit SBA.gov.

Note that businesses with delinquent federal debt, open federal tax liens, or prior government losses are not eligible for SBA-backed financing.

Common Mistakes Business Owners Make

Underestimating Soft Costs

Architect fees, permits, environmental studies, and lender fees can add 10%–15% to your total project cost. Build these into your budget from day one.

Choosing an Unqualified Contractor

Lenders scrutinize contractor credentials closely. A contractor with no verifiable commercial experience can derail your approval — and your timeline.

Ignoring Rate Lock Options

If your construction phase runs 18 months, market interest rates could shift meaningfully before conversion. Ask your lender whether a rate lock on the permanent phase is available and what it costs. Understanding how bridge loan interest reserves are structured can also help you anticipate how interim carrying costs are managed across different commercial loan types.

Skipping the Feasibility Analysis

According to the U.S. Census Bureau, construction costs have remained elevated in recent years. A thorough feasibility analysis — including comparable lease rates in your market — is non-negotiable before you commit.

Is a Construction to Permanent Loan Right for Your Business?

This loan type makes the most sense if:

  • You need a purpose-built facility tailored to your operations
  • You plan to own and occupy the property long-term
  • You want to minimize closing costs by combining two transactions into one
  • You have a qualified contractor, approved plans, and a realistic timeline

If you're acquiring an existing property that needs heavy renovation, a bridge loan may be the more flexible starting point — our rehab and bridge financing guide for commercial real estate walks through exactly what lenders look for in that scenario. But for ground-up construction, the one-time-close structure of a C-to-P loan offers meaningful cost and certainty advantages.

Get Started with Indymae

At Indymae, our commercial lending specialists work with small and medium-sized businesses across the country to structure construction to permanent loans that align with your project budget, timeline, and long-term real estate strategy. Whether you're exploring SBA-backed options or conventional commercial financing, our team can help you identify the right path forward.

Ready to break ground on your next project? Contact Indymae today to speak with a commercial lending advisor and get a preliminary loan assessment for your construction to permanent financing needs.