520 West Ave

For Lease 23,125 SF

520 West Ave, Norwalk, CT 06850

Coldwell Banker Commercial Realty is pleased to present a medical office leasing opportunity at 520 West Avenue in Norwalk, Connecticut. The Frost Building sits in the heart of downtown Norwalk's medical corridor, with immediate connectivity to I-95, the Merritt Parkway, US-7, and US-1, and is just 1,000 feet from Norwalk Hospital's main campus.​ The surrounding trade area offers affluent demographics and strong healthcare demand, supported by a walkable downtown setting with easy access to dining, cafés, banking, and retail. It's the kind of location that continues to draw specialty practices, primary care, and outpatient healthcare operators to Fairfield County.​ A rare large-block availability is now open in this Class A medical office building, with up to 23,125 SF available across two suites: an 8,000 SF ground-floor suite and an entire 15,125 SF second floor, divisible or combined. The building is anchored by Nuvance Health (Northwell Health) outpatient programs and services, and is owned and managed by Seligson Properties, a landlord with decades of healthcare real estate experience. On-site parking includes 143 spaces at a 5-per-1,000 SF ratio, with a dedicated patient drop-off and covered entry.

Key features

  • Age: Over 50 Years Old
  • Lot Size: 1/2 - 1 Acre
  • Sewer: City
  • Water: City Water

Rental Details

  • Number of spaces 2
  • Total square feet available 23,125 SF
  • For Lease $41.50/SF/YR
  • Space Type Medical Office
  • Lease Type NNN
  • Latest Update Aug 14, 2026
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2 Spaces Available

101

Space Type
Medical Office
Lease Rate
$41.50/SF/YR
Total Space
8,000 SF
Lease Type
NNN

201

Space Type
Medical Office
Lease Rate
$41.50/SF/YR
Total Space
15,125 SF
Lease Type
NNN

Contacts

Sean McDonnell

Coldwell Banker Realty

Brandon Manka

Coldwell Banker Realty

Building Details

  • For Lease $41.50/SF/YR
  • Property Type Office - Medical Office
  • Property Size 28,320 SF
  • Lot Size 0.76 Acre
  • Additional Rent Price on request
  • # of Floors 2
  • Year Built 1930
  • Year Renovated 2025
  • Date Updated Aug 14, 2026

Location

  • City Norwalk, CT
  • Neighborhood North Norwalk
  • Zip Code 06850
  • Market Bridgeport New Haven
  • Walk score 82/100 Very Walkable
  • Transit score 54/100 Good Transit
  • Bike score 59/100 Bikeable
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Points of Interest

South Norwalk

1.18 miles

Westport

2.43 miles

Merritt 7

2.44 miles

Talmadge Hill

4.23 miles

New Canaan

4.74 miles

Green's Farms

5.36 miles

Glenbrook

6.08 miles

Cannondale

7.27 miles

Amtrak Metro North Taxi Stand

7.89 miles

Old Greenwich

9.58 miles

Mobil

0.13 miles

Global

0.65 miles

Shell

0.82 miles

Cumberland Farms

0.84 miles

Shell Express

1.68 miles

Tesla Supercharger

3.20 miles

Ambulance Parking

0.31 miles

Courthouse Employee Parking

0.35 miles

Yankee Doodle Garage

0.43 miles

Connecticut Park and Ride

0.54 miles

Handicapped Parking

0.56 miles

Government Vehicles Only

0.58 miles

Maritime Garage

0.75 miles

Ironworks Garage

0.87 miles

Haviland Lot

0.96 miles

South Norwalk Station Parking Garage

1.20 miles

Star Car Wash

0.81 miles

Splash Car Wash

1.21 miles

H-E-B Car Wash

5.25 miles

Fred's Car Wash

6.77 miles

Alamo

7.23 miles

National

7.24 miles

All Quest Car Service & Limousine

7.34 miles

Hertz

9.16 miles

Enterprise

9.24 miles

Avis Budget Car Rental

9.62 miles

Sedona Taphouse

0.07 miles

Colony Grill

0.07 miles

Dunkin'

0.16 miles

Kim Feng

0.32 miles

El Idolo Restaurant

0.32 miles

Casa Blanca Restaurant

0.34 miles

Pontos Taverna

0.41 miles

Fat Cat Pie Company

0.51 miles

Aji 10

0.54 miles

Mochica

0.63 miles

Nordstrom

0.46 miles

The SoNo Collection

0.52 miles

Bloomingdale's

0.58 miles

Stew Leonard's

1.06 miles

Stew Leonards

1.06 miles

Patel Brothers

1.22 miles

TJ Maxx

1.28 miles

ShopRite

1.40 miles

Stop & Shop

1.42 miles

Kohl's

1.67 miles

Norwalk Hospital

0.25 miles

Cassena Care At Norwalk

0.26 miles

Rite Aid

0.68 miles

Norwalk Fire Department Station 2

0.72 miles

Norwalk Community Health

0.74 miles

Norwalk Fire Department Station 3

0.96 miles

Norwalk Marine Fire Rescue

1.04 miles

South Norwalk Police Station

1.07 miles

Norwalk Fire Department Station 4

1.19 miles

Hartford HealthCare Urgent Care

1.24 miles

Listing Summary

  • Office Space Available at 520 West Ave

    Office space currently available at 520 West Ave adds up to a total of 23,125 square feet across 2 listing(s). The largest individual space listed offers 15,125 square feet. Property use types available for lease at this property include: medical office.

  • Learn More about 520 West Ave

    520 West Ave is located in the Bridgeport New Haven market and pertains to the 06850 zip code. The property incorporates a total of 23,125 square feet of space. 520 West Ave was built in 1930. The most recent renovation work at this property was completed in 2025.

    Interested in researching more about this property? Access in-depth research on 520 West Ave, including ownership details, transaction history, property characteristics, taxes, mortgage data, violations and more by creating a free account and viewing the full property report.

  • Get to Know the Neighborhood

    In the North Norwalk neighborhood, where 520 West Ave is located, you can currently find 79 office space(s) for rent. In total, this amounts to 812,096 square feet of available office space for lease opportunities.

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