SBA loan guide

SBA Occupancy Requirements: 51% Existing Buildings and 60% New Construction

For SBA-financed real estate, check how much rentable property the borrower will occupy, what can be leased, and whether the project is existing space or new construction.

Last reviewed: May 26, 2026 by the BizLeaseCheck Editorial Team

General information, not legal or financial advice.

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Overview

SBA real-estate occupancy rules are a threshold issue for borrowers buying, renovating, or constructing property. The core federal rules distinguish existing buildings from new construction and limit how much space can be leased to others.

The best review starts with a rentable-square-foot schedule, lease plan, construction plan, operating-company/EPC structure, and written confirmation that occupancy will satisfy 13 CFR requirements.

Topics to check

Existing buildings generally require 51% borrower occupancyHigh confidence

13 CFR § 120.131 says that for acquisition, renovation, or reconstruction of an existing building, the borrower may permanently lease up to 49% of the rentable property if it permanently occupies and uses no less than 51%.

If an eligible passive company leases the whole space to operating companies, the operating companies together must follow the same rule.

13 CFR § 120.131 — leasing part of building

New construction generally starts at 60% occupancyHigh confidence

13 CFR § 120.131 says that for construction of a new building, the borrower may permanently lease up to 20% if it permanently occupies and uses no less than 60% and plans to occupy remaining space under the regulatory timeline.

The borrower must plan to occupy some of the remaining space within three years and all remaining non-permanently-leased space within ten years.

13 CFR § 120.131 — new construction occupancy

504 project-property leasing has additional languageHigh confidence

13 CFR § 120.870 addresses leasing project property in the 504 program, including leasehold estate collateral and new-construction leasing limits.

Use it alongside § 120.131 and the current SOP when reviewing a 504 project.

13 CFR § 120.870 — leasing project property

Speculative or investment rental real estate is not the target useHigh confidence

SBA 504 materials state that 504 loans cannot be used for speculation or investment in rental real estate.

A project with tenants can still qualify if it meets occupancy and program requirements, but a primarily investment-property deal needs careful review.

SBA — 504 loans

Documentation should match the rent roll and floor planMedium confidence

Occupancy analysis should reconcile rentable square footage, tenant leases, operating-company space, construction phases, and post-closing expansion plans.

If the math is close, ask the CDC or SBA lender for written confirmation before signing purchase, construction, or lease documents.

SBA SOP 50 10 landing page

Key takeaways

Existing buildings generally use the 51% borrower-occupancy baseline.
New construction generally starts with 60% occupancy and staged future-occupancy plans.
The rentable-property math should match leases and floor plans.
504 project-property rules should be checked in 13 CFR § 120.870 and SOP 50 10.
Investment-property use can create eligibility problems.

Official resources

SBA Form 148 — Unconditional Guarantee SBA SOP 50 10 — Lender and Development Company Loan Programs 13 CFR § 120.160 — SBA loan conditions CFPB Regulation B / ECOA — 12 CFR Part 1002 13 CFR § 120.131 — leasing part of building 13 CFR § 120.870 — 504 project-property leasing SBA — 504 loans

Legal-review notes

Guide confidence marker: High confidence.

Verify current SOP 50 10 occupancy guidance for EPC/OC structures, mixed-use properties, and phased construction before paid promotion.
Have counsel or the CDC review close-call rent-roll and floor-plan calculations.

Frequently asked questions

What is the SBA 51% occupancy rule?

For an existing building acquisition, renovation, or reconstruction, 13 CFR § 120.131 generally allows leasing up to 49% if the borrower permanently occupies and uses at least 51%.

What is the SBA 60% new-construction rule?

For new construction, 13 CFR § 120.131 generally requires the borrower to permanently occupy and use at least 60%, with plans to occupy additional non-leased space over time.

Can I lease part of my SBA-financed building to tenants?

Yes, if the project satisfies the applicable occupancy and leasing limits. The answer depends on whether the building is existing or new construction and on the program documents.