Treasure Coast Commercial Office Space for Rent

Q3 2026

Q3 2026 Treasure Coast Commercial Real Estate Market Report

Focus: Q3 2026 Market Trends

Executive Summary

The Treasure Coast, spanning Indian River, St. Lucie, and Martin counties, continues to attract industrial investment and new businesses. Retail storefronts remain the region's dominant tenant search category on TenantBase at 66.7% in Q3, while office demand climbed to 22.2% of all Treasure Coast tenant searches, up from 2.9% in Q2, and office tenants are committing to multi-year terms.

Sector Snapshot

  • Retail: Leading tenant demand. Storefront space has made up roughly two-thirds of TenantBase searches in every quarter of 2026.
  • Office: Rising. Office searches on TenantBase jumped to their highest share of 2026.
  • Industrial: Growing. A proposed $310 million, 1.3 million SF manufacturing facility in St. Lucie County highlights the region's industrial momentum.

Treasure Coast Tenant Demand Index

The TenantBase Tenant Demand Index tracks what businesses across Indian River, St. Lucie, and Martin counties are actively searching for on the TenantBase platform each quarter. Because it measures tenant intent before leases are signed, it shows where demand is heading ahead of traditional vacancy and absorption data.

Q3 2026 Search Share by Space Type (July 1 to September 30, 2026)

  • Retail/Storefront: 66.7%
  • Office: 22.2%
  • Warehouse/Industrial: 11.1%

Three-Quarter Trend

  • Retail/Storefront: 65.4% in Q1, 68.4% in Q2, 66.7% in Q3
  • Office: 3.9% in Q1, 2.9% in Q2, 22.2% in Q3
  • Warehouse/Industrial: 30.7% in Q1, 29.5% in Q2, 11.1% in Q3

Key Takeaways

  • Retail is the Treasure Coast's most consistent demand category, holding between 65% and 69% of searches in every quarter of 2026.
  • Office demand reached its highest share of the year, rising from under 4% in Q1 and Q2 to 22.2% in Q3.
  • Office tenants are committing longer and need more space. Every Q3 office search sought a 3 to 5 year term, averaging 2,500 to 5,000 SF, up from 500 to 1,000 SF in Q2.
  • Melbourne and Port St. Lucie led location interest among tenants who specified an area.

Office Market

TenantBase Office Activity

Demand share: 22.2% of Treasure Coast tenant searches, up from 2.9% in Q2 and 3.9% in Q1.

Lease term preferences: 3 to 5 years: 100.0%

Space requirements: 2,500 to 5,000 SF.

TenantBase data vs. the market: Treasure Coast office demand on TenantBase in Q3 came entirely from tenants seeking multi-year commitments in the 2,500 to 5,000 SF range. Tenants of that size should begin their search early to secure suitable space.

Industrial & Warehouse Market

The Treasure Coast's industrial pipeline continues to grow. In May 2026, St. Lucie County commissioners approved measures supporting "Project Orchid," a proposed $310 million, 1.3 million SF manufacturing facility that could bring more than 1,000 jobs and an estimated $53 million in annual payroll, nearly three times the size of the county's largest current manufacturer (WFLX).

Key Metrics (Q2 2025, most recent published county data)

  • St. Lucie County vacancy: 3.3% at $16.92/SF (Matthews)
  • Martin County vacancy: 3.0% at $17.85/SF (Matthews)
  • Indian River County vacancy: 15.8% at $11.75/SF, with 150,000 SF under construction (Matthews)

TenantBase Industrial Activity

Demand share: 11.1% of Treasure Coast tenant searches, down from 29.5% in Q2 and 30.7% in Q1.

TenantBase data vs. the market: Industrial vacancy in St. Lucie and Martin counties has run near 3%, so small industrial users should expect limited options outside Indian River County, which has the most available space.

Retail Market

TenantBase Retail Activity

Demand share: 66.7% of Treasure Coast tenant searches, the largest category for the third straight quarter.

Lease term preferences:

  • Less than one year: 33.3%
  • 2 to 3 years: 33.3%
  • 3 to 5 years: 33.3%

Space requirements: 1,000 to 2,500 SF.

TenantBase data vs. the market: Treasure Coast retail demand on TenantBase centers on small storefronts under 2,500 SF, with tenants evenly split across short and multi-year terms. Small-format tenants should move quickly on well-located space, particularly in Melbourne and Port St. Lucie, where search interest is concentrated.

Q4 2026 Outlook

  • Retail: Expect retail to remain the region's leading search category.
  • Office: Expect continued multi-year demand for small and mid-size suites.
  • Industrial: Expect large manufacturing and logistics projects to keep shaping the market.

Frequently Asked Questions

What type of commercial space are Treasure Coast tenants searching for in 2026?

In Q3 2026, retail/storefront space made up 66.7% of Treasure Coast tenant searches on TenantBase, followed by office at 22.2% and warehouse/industrial at 11.1%.

Which Treasure Coast cities are tenants searching most?

Melbourne and Port St. Lucie were the most requested areas among Treasure Coast tenants on TenantBase in Q3 2026.

How much office space do Treasure Coast tenants need?

Treasure Coast office tenants on TenantBase averaged 2,500 to 5,000 SF in Q3 2026, all seeking 3 to 5 year terms.

What is the industrial vacancy rate on the Treasure Coast?

As of the most recent published county data, industrial vacancy was 3.3% in St. Lucie County, 3.0% in Martin County, and 15.8% in Indian River County, according to Matthews.

How can I find commercial space on the Treasure Coast at no cost?

TenantBase matches business tenants with vetted independent tenant rep brokers across Indian River, St. Lucie, and Martin counties at no cost to the tenant. Brokers are compensated by the landlord. Get started with TenantBase.

Sources

  1. TenantBase proprietary search data, Treasure Coast, July 1 to September 30, 2026
  2. TenantBase, Treasure Coast Commercial Real Estate Market Report, Q2 2026
  3. TenantBase, Treasure Coast Commercial Real Estate Market Report, Q1 2026
  4. WFLX, Proposed Industrial Manufacturing Facility Could Bring Over 1,000 Jobs to Treasure Coast (May 8, 2026)
  5. Matthews, Treasure Coast Industrial Market Report, Q2 2025

Disclaimer

Information in this report is aggregated from third-party sources and TenantBase proprietary platform data, and was synthesized with the assistance of AI. Market metrics reflect the most recent published data available at the time of writing. TenantBase search data reflects tenant activity on the TenantBase platform and is not a measure of total market leasing. All figures should be independently verified before making real estate decisions.