520 West Avenue

520 West Avenue, Norwalk, CT 06850

Property Information

  • For Lease $41.50/SF/YR
  • Property Type Office - Medical Office
  • Property Size 28,320 SF
  • Lot Size 0.76 Acre
  • Building Class C
  • Year Built 1930
  • Year Renovated 2025
  • Date Updated Aug 14, 2026

Description

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.Coldwell Banker Commercial Realty presents a medical office leasing opportunity at 520 West Avenue in Norwalk, the Frost Building, located in downtown Norwalk's medical corridor and 1,000 feet from Norwalk Hospital's main campus, with immediate access to I 95, the Merritt Parkway, US 7, and US 1. The trade area has affluent demographics and strong healthcare demand, with a walkable downtown offering dining, cafés, banking, and retail. This continues to draw specialty practices, primary care, and outpatient operators to Fairfield County. A rare large block opportunity of institutional-quality built-out medical space totaling 23,125 SF is available across two suites: an 8,000 SF ground floor suite with direct street visibility, and a 15,125 SF full second floor. The building is currently anchored by Northwell/Nuvance Health outpatient programs and owned and managed by Seligson Properties, a locally-based landlord with decades of healthcare real estate experience. It offers 143 total parking spaces (133 covered, 10 surface), direct at grade access from the garage into the building, and a dedicated covered patient drop-off entry.

Highlights

  • 143 parking spaces (133 covered)
  • Direct at-grade access with dining, cafes, banking and retail
  • Rare downtown medical space
  • Steps from Norwalk Hospital, minutes from I-95 & Merritt Parkway

2 Spaces Available

101

Space Type

Medical Office

Lease Rate

$41.50/SF/YR

Total Space

8,000 SF

Floor

1

Divisible Space

8,000 - 8,000 SF

Available Date

Immediate

Lease Type

NNN

Renewal Option

Yes

Sublease

No

8,000 SF ground-floor suite at 520 West Avenue (The Frost Building), Norwalk, with direct street visibility and frontage, suited to medical or retail use. Institutional-quality build-out, with direct at-grade access from the covered parking garage and a dedicated covered patient drop-off entry. Located in downtown Norwalk's medical corridor, 1,000 feet from Norwalk Hospital, steps from downtown dining, cafés, banking, and retail, in a building anchored by Northwell/Nuvance Health outpatient programs.

201

Space Type

Medical Office

Lease Rate

$41.50/SF/YR

Total Space

15,125 SF

Floor

2

Divisible Space

15,125 - 15,125 SF

Available Date

Immediate

Lease Type

NNN

Renewal Option

Yes

Sublease

No

15,125 SF full-floor medical suite at 520 West Avenue (The Frost Building), Norwalk. Institutional-quality, built-out for outpatient medical use, with direct at-grade access from the covered parking garage and a dedicated covered patient drop-off entry. Located in downtown Norwalk's medical corridor, 1,000 feet from Norwalk Hospital, in a building anchored by Northwell/Nuvance Health outpatient programs. Full-floor layout suits a single large operator or multi-tenant medical use.

Contacts

Location

Located at 520 West Avenue, Norwalk, CT 06850, this property is part of the North Norwalk neighborhood and Bridgeport New Haven market.

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