Commercial Real Estate for Lease in Middlesex County, CT

Middlesex County covers 15 towns along the lower Connecticut River, from Cromwell and Middletown down to Old Saybrook on Long Island Sound, served by Route 9, I-91 and I-95.

7 current listings Commercial Real Estate for Sale (6) Search with filters

255 Route 80, Killingworth, CT 06419

6 spaces available in professional building at traffic circle

Office / Professional

Asking $20.99 - $36.14 / SF

241 Shunpike Road, Cromwell, CT 06416

Studio

Office / Specialized

Asking $1.00 / SF

65 Research Parkway, Old Saybrook, CT 06475

Industrial space with 12 ft overhead doors

Industrial / Warehouse · 6,694 SF

Asking $8.15 / SF

93 Elm Street, Old Saybrook, CT 06475

Directly in front of Stop & Shop, near Walmart and HomeGoods

Retail, Office · 3,300 SF · 0.45 acres

Asking $21.00 / SF

5 Pequot Park Road, Westbrook, CT 06498

Professional Medical / Office space for Lease

Office / Medical · 24,632 SF · 4.48 acres

Asking $24.50 / SF

241 Shunpike Road, Cromwell, CT 06416

Studio or Office

Retail

Asking $1.00 / SF

176 Connecticut 81, Killingworth, CT 06419

1,200 SF Office Space

Office / Professional

Asking $9.75 / SF

Conn-Comp market snapshot

Commercial sales in Middlesex County, last 12 months

sales recorded

$132

median price per SF

$97 - $183

middle half, per SF

7.24%

average mortgage rate

Median sale price $700,000. 56% of sales were financed, average loan 74% of price. Median price per SF up 3% from the prior 12 months. October 2025 through September 2026. Source: Conn-Comp Sales Data, verified Connecticut sales and recorded mortgages. For verified sales data, use Sales Data Login

About Middlesex County

With 164,245 residents at the 2020 Census, Middlesex County centers on Middletown, home to Wesleyan University, Middlesex Health and a Pratt & Whitney plant. Industrial property is concentrated in Middletown, Cromwell and the Route 9 corridor, while the shoreline towns of Clinton, Westbrook and Old Saybrook have retail and tourism property along US 1. The river towns of Essex, Deep River, Chester and East Haddam have small village centers.

Connecticut has had no county government since 1960, so the county is a geographic area only. Zoning, permits and property taxes are set by each town.

Population (2020 Census)	164,245
Towns	15
Land area	About 369 square miles
Largest towns	Middletown, Cromwell, Clinton, East Hampton, Old Saybrook
Jobs located in the county	70,232
Active businesses	15,946
Highways	I-91, I-95, Route 9, Route 17, Route 66, US 1
Rail	Amtrak and Shore Line East (Old Saybrook, Westbrook, Clinton)
Airport	Bradley International and Tweed New Haven are the nearest commercial airports

Sources: U.S. Census Bureau, 2020 Census; AdvanceCT and CTData Collaborative, 2026 Town Profiles (jobs and businesses added up across the county's towns)

Questions and answers

How many commercial real estate listings are for lease in Middlesex County, CT?

As of October 26, 2026, Conn-Comp Listings has 7 current commercial real estate listings for lease in Middlesex County, CT. Listings are added by Connecticut brokers and updated daily.

What are asking rents for commercial real estate in Middlesex County, CT?

Asking rents from $1.00 / SF to $24.50 / SF. Based on current listings that show a rent.

Which towns in Middlesex County have the most commercial real estate for lease?

Right now: Cromwell (2), Killingworth (2), Old Saybrook (2).

Where can I find verified lease rents in Middlesex County?

Conn-Comp Sales Data has verified Connecticut sales and leases. Subscribers sign in with Sales Data Login.