Marcus & Millichap added insurance brokerage Brown & Brown Inc. to its Preferred Partner Program in June 2026, embedding data-driven insurance indications and catastrophe modeling into the acquisition workflow for self-storage and other commercial real estate investors. M&M chief growth officer Richard Matricaria said insurance has become a critical component of investment analysis and transaction execution. The firm closed 8,818 transactions worth approximately $50.8 billion in 2025.
This is not a vendor directory update. It is a market signal that premium trends now sit beside rent growth and occupancy in every serious underwriting model.
What Did Marcus & Millichap and Brown & Brown Announce?
Modern Storage Media reported the partnership on June 25, 2026. Inside Self-Storage published additional detail on June 29, 2026. The appointment extends M&M's Preferred Partner Program, which the brokerage launched earlier in June 2026 to connect clients with third-party providers across the commercial real estate lifecycle.
Brown & Brown's National Real Estate Practice will deliver:
- Data-driven insurance indications during acquisition screening
- Portfolio reviews and catastrophe modeling
- Due-diligence support on property and casualty exposure
- Access to specialty carriers serving commercial real estate
- Educational webinars and insurance trend content
Richard Matricaria framed the rationale directly.
Insurance has become a critical component of investment analysis and transaction execution. Brown & Brown provides our clients with valuable insurance and risk insights earlier in the investment process, helping them evaluate opportunities and execute transactions with greater confidence.
Dan Cioci, executive vice president and director of Brown & Brown's National Real Estate Practice, echoed the valuation angle.
As insurance costs continue to play a larger role in valuation and execution, commercial real estate investors are seeking greater clarity early in the transaction process.
Why Is Insurance Moving Up the Underwriting Stack?
Self-storage investors spent 2024 and 2025 focused on supply-driven rent compression. In 2026, the expense side of the ledger is equally loud.
Capright's June 2026 REIT update documented same-store NOI growth averaging negative 1.2% across major REITs while same-store revenue growth averaged just 0.1%. Rental rates declined 0.8% year-over-year. Revenue stabilization is arriving slowly. Expenses are not waiting.
Insurance sits in that expense stack alongside property taxes, utilities, and payroll. Coastal and catastrophe-exposed portfolios felt premium spikes first. The M&M/Brown & Brown partnership formalizes what sophisticated buyers already do informally: pull insurance indications before LOI, not after diligence.
For self-storage specifically, the risk profile looks deceptively simple. Box buildings, low staffing, minimal mechanical systems. Underwriters still price wind, hail, flood, fire, and liability exposure aggressively in Florida, Gulf Coast, and Southeast markets where June 2026 acquisition volume remains active even as supply pressures rents.
How Does This Affect Self-Storage Deal Pricing?
When insurance premiums rise faster than rents, buyers have three levers:
- Lower the purchase price to preserve yield
- Underwrite higher stabilized expenses and accept a lower IRR
- Walk when the seller will not adjust
Embedding Brown & Brown inside M&M's partner program makes option one and two happen earlier. Buyers get indications before they waste weeks on deals that fail at the insurance quote stage.
Consider a simplified illustration:
| Assumption | 2023 Underwriting | 2026 Underwriting |
|---|---|---|
| Stabilized NOI | $800,000 | $800,000 |
| Annual insurance | $45,000 | $72,000 |
| Implied cap rate | 5.5% | 5.5% |
| Value at constant cap | $14.5M | $13.2M |
A $27,000 insurance increase at constant NOI wipes roughly $490,000 off value at a 5.5% cap. That is not a rounding error on a $8 million Tampa trade or a $30 million Chicago infill asset.
M&M's 2025 volume of 8,818 transactions means even small pricing adjustments across the platform compound into meaningful market impact.
Who Benefits From Earlier Insurance Visibility?
Buyers avoid surprise premium quotes that kill deals in week six of diligence.
Sellers who obtain competitive quotes before listing can defend pricing with documentation instead of re-trading after the buyer's broker forwards a catastrophic indication.
Third-party managers operating across multiple states can benchmark portfolio premiums and negotiate master programs instead of facility-by-facility renewals.
Lenders reviewing debt service coverage get cleaner expense assumptions when borrowers include broker-supported insurance projections.
The partnership does not eliminate premium inflation. It moves the conversation from post-LOI surprise to pre-offer math.
How Does This Connect to Broader June 2026 Market Themes?
Three other June 2026 storylines intersect with the insurance underwriting shift:
Regulatory compliance costs are rising in parallel. Maryland SB 438 takes effect July 1, 2026, and the SSA's 2026 legislative agenda targets 17 states for lien law modernization. Legal and insurance risk are both becoming line-item diligence categories.
Zoning and moratorium risk adds location-specific underwriting questions. Atlanta's June 2026 self-storage moratorium shows municipalities treating storage as land-use competition, which can affect expansion insurability and business interruption modeling on development deals.
Mega-merger concentration raises portfolio insurance complexity. Public Storage's pending NSA acquisition and Canada platform entry will test how the largest operators negotiate carrier programs at scale.
What Should Operators Do Now?
If you are buying:
- Request insurance indications with trailing three-year loss runs before submitting offers
- Model two premium scenarios (base and stress) in every pro forma
- Ask whether Brown & Brown or comparable brokers can catastrophe-model wind and flood exposure at the parcel level
If you are selling:
- Obtain broker quotes before listing and include expense detail in offering memorandums
- Fix known property condition issues that trigger premium surcharges (roof age, gate security gaps, fire suppression documentation)
If you are holding:
- Benchmark premiums annually across the portfolio
- Bundle properties where carriers offer multi-location credits
The Numbers Worth Writing Down
- Partnership announced: June 25-29, 2026 (Modern Storage Media / Inside Self-Storage)
- M&M 2025 transaction count: 8,818 closings
- M&M 2025 sales volume: approximately $50.8 billion
- M&M office footprint: 80 offices in the U.S. and Canada
- Capright 4Q25 REIT same-store NOI: negative 1.2% average across major REITs
- Capright 4Q25 same-store revenue: +0.1% average
- Brown & Brown services added: insurance indications, catastrophe modeling, portfolio reviews, due-diligence support
Premiums Are Part of the Cap Rate Now
Marcus & Millichap did not add Brown & Brown because insurance is trendy. M&M added them because buyers kept losing deals to premium quotes that arrived too late.
In a year when Yardi Matrix still shows national advertised rents down 1.8% year-over-year and REIT same-store NOI remains pressured, every expense line matters. Insurance is no longer a closing-table detail. It is front-page underwriting.
Sources
- Commercial Real Estate Firm Marcus & Millichap Adds Insurance Brokerage to Preferred Partner Program, Inside Self-Storage
- Marcus & Millichap Names Brown & Brown Preferred Partner, Modern Storage Media
- Capright June 2026 REIT Contract-Street Rent Gap, Your Ciao News
- Baranof StorQuest Tampa $8.25M Acquisition, Your Ciao News
- SSA 2026 Legislative Agenda, Your Ciao News
- Self-Storage REIT Update – June 2026, Capright