Add Listing
    For Lease
    • For Sale
    • For Lease
    • Recently Sold
    • Property Lookup
    • Brokers
    Class A Office Building Title is generated by Realmo AI

    20 City Square, Charlestown, MA 02129

    View on Map
    Claim this Listing
    New
    For Lease
    Contact for pricing

    Class A office building offering prominent window lines, city and harbor views, and direct access to major routes with secure 24-hour access.

    Type:Office
    Property size:
    10,000 SF
    Added:
    Jun 2, 2026
    Days on Market:
    2
    Last Refresh:
    Jun 3 at 2:04 am

    Property Features for 20 City Square

    General Information

    Standard status
    Active
    Size
    10,000 SF
    Property subtype
    Office

    Spaces For Lease

    at 20 City Square Contact us

    We can help!

    Listing Contact
    Rob Cronin

    Listing agent Rob Cronin

    Listing office Lincoln Property Company | Boston

    Listing date Jun 2, 2026

    Source Lpc

    Displayed information is deemed reliable but is not guaranteed and should be independently verified.

    All listing content including descriptions, pricing, images are the copyrighted material of Lincoln Property Company | Boston

    HighLights

    • Class A office building built in 2002 in Charleston, MA
    • Prominent window lines with city and harbor views
    • 24‑hour access with on‑site security and property management
    • Direct access to I‑93 & Route 1
    • On‑site garage parking available
    • Short walk to North Station and North End restaurants

    Overview

    This Class A office building was built in 2002 and is designed for a professional, high-quality work environment. Distinctive window lines provide city and harbor views throughout the building, creating a strong day-to-day workplace experience. The property offers 24-hour access along with on-site security and property management.

    The building provides direct access to I-93 and Route 1, supporting convenient regional connectivity for employees, clients, and visitors. On-site garage parking is available, helping reduce friction for day and after-hours appointments. It is also described as a short walk to North Station and nearby North End restaurant options.

    With its Class A positioning, security-forward operations, and reliable access to key roadways, this property is well suited for established businesses that value a polished office setting and practical commute options. Companies looking for a full-service, management-supported environment with strong views and building-hours flexibility should find the configuration compelling.
    Location Intelligence

    Current Use by Public Records

    Lendlease Construction Company 62SullivanSt3.com Real Estate Agency FedEx Drop Box Postal Service Campbell Conroy & O'Neil, ... Law Firm

    Suggested Use

    Restaurant Real Estate Agency Law Firm Spa & Massage Center Hair Salon Dental Office Nail Salon Food Market Grocery & Convenience Store Gym & Fitness Center

    Zoning and permitted uses should be independently verified with local authorities.

    Location Insight

    • Map
    • Local Demand
    City
    Charlestown
    County
    Suffolk
    State
    Massachusetts
    Longitude
    -71.061209
    Latitude
    42.372107

    Nearby Similar for Lease

    • Contact for pricing
      1,391 SF

      Office Space with Harbor Views

      Office space for lease with abundant natural light and harbor views.
      40 Warren St, Charlestown, MA 02129
      View Details
    • Contact for pricing
      15,608 SF

      Renovated Office Building with Amenities

      Landmark office building in Charlestown with water views.
      529 Main Street, Charlestown, Massachusetts
      View Details
    • Contact for pricing
      11,750 SF

      Modern Office Space with Meeting Rooms

      Lease a modern office suite with technology-enhanced meeting and conference spaces and on-site parking.
      500 Rutherford Avenue, Charlestown, MA 02129
      View Details
    • Contact for pricing

      Modern Office Space in Boston

      Functional office suites available in a desirable Boston neighborhood.
      10 City Square | Charlestown, MA 02129
      View Details
    • Contact for pricing

      Waterfront Luxury Apartment Retail Space

      Retail spaces available in luxury waterfront apartment community.
      250 1st Avenue, Charlestown, MA 02129
      View Details
    • Contact for pricing

      Charlestown Office Space Available

      Office space for rent in Charlestown, Massachusetts.
      96 13th Street, Charlestown, MA 02129
      View Details
    • Contact for pricing
      25,135 SF

      Versatile Commercial Space Available

      Adaptable space with amenities, convenient location, and on-site management.
      465 Medford St, Charlestown, MA
      View Details
    • Contact for pricing
      5,260 SF

      Charming Retail Space in Charlestown

      Historic neighborhood retail space with easy access to downtown Boston.
      6 Monument Ave, Charlestown, MA
      View Details
    • Contact for pricing
      14,294 SF

      Renovated Flex Space Available

      Flex space with industrial and office areas, available 2025.
      10 Dorrance St, Charlestown, MA
      View Details
    • Contact for pricing
      8,244 SF

      Charlestown Office Space with Parking

      Office space in historic Charlestown with harbor views and parking.
      34-42 Warren St, Charlestown, MA
      View Details
    • Contact for pricing
      10,000 SF

      Creative Office Space Available Now

      Creative office space with city and harbor views for rent.
      20 City Sq, Charlestown, MA
      View Details
    • Contact for pricing
      4,800 SF

      Charlestown Office Space Available

      4,800 SF office space for rent in Charlestown.
      18 Spice St, Charlestown, MA
      View Details

    FAQs

    What type of property is this?
    Office building - Class A office building offering prominent window lines, city and harbor views, and direct access to major routes with secure 24-hour access.
    Where is this office building located?
    The property is located at 20 City Square Charlestown, MA.
    What are key features of this property?
    This property features: Class A office building built in 2002 in Charleston, MA; Prominent window lines with city and harbor views; 24‑hour access with on‑site security and property management
    (781) 929-4699
    We can help!
    Listing Contact
    Rob Cronin
    Learn More
    Request Owner's contact information
    Message sent successfully
    Error
    If you are the owner or broker of this property and would like to edit or remove this listing please send a message to web site administrator.
    Message sent successfully
    Error
    Email to Your Friends
    Link copied to clipboard
    Separate multiple addresses with a comma
    Message sent successfully
    Error

    Realmo Value Estimations

    Realmo estimates a property’s market value using a proprietary methodology that incorporates public data and user-submitted information. This cumulative value is generated by integrating a variety of conventional and innovative methods. 

    Disclaimer

    These figures are not official appraisals and should not be used as a substitute for a valuation performed by a licensed appraiser.
    Actual market value may differ due to factors not captured in the data. Estimates are offered for informational purposes only, and users should conduct independent research before making financial or investment decisions.
    By using this feature, you acknowledge that Realmo is not responsible for actions taken based on these estimates.

    AI approach

    Realmo AI Method estimates property value using machine learning models trained on millions of comparable listings, transactions, and market signals. It analyzes property features, location intelligence data, and current market dynamics to predict the most probable market value in real time.

    Realmo CapRate Calculation

    Realmo calculates the Capitalization Rate (Cap Rate) to help estimate a property's potential return on investment. The Cap Rate is a fundamental metric in commercial real estate that measures the relationship between a property's net operating income and its market value.

    How We Calculate Cap Rate

    Cap Rate Formula:
    Cap Rate (%) = (Net Operating Income / Property Value) × 100

    Net Operating Income (NOI) Formula:
    NOI = Area × Lease Rate × (1 - Vacancy Rate) × (1 - Operating Expense Ratio)

    Components

    Net Operating Income (NOI) represents the annual income a property generates after operating expenses:

    • Area: Building square footage from property records
    • Lease Rate: Annual $/sqft based on market data for the property type and geographic location
    • Vacancy Rate: Percentage of unoccupied space based on market data for the property type and location
    • Operating Expense Ratio: Operating costs as a percentage of income, varies by property type

    Property Value is derived from:

    • Recent sale price (if available)
    • Statistical models using comparable sales
    • AI-powered valuation estimates

    Example Calculation

    For a 100,000 sqft Office Building:

    • Lease Rate: $25.00/sqft/year (market data for Office in this area)
    • Vacancy Rate: 8% (market data for Office in this area)
    • Operating Expense Ratio: 35% (typical for Office properties)
    • Property Value: $15,000,000

    Step 1: Calculate NOI

    NOI = 100,000 × $25.00 × (1 - 0.08) × (1 - 0.35)
    NOI = 100,000 × $25.00 × 0.92 × 0.65
    NOI = $1,495,000/year

    Step 2: Calculate Cap Rate

    Cap Rate = ($1,495,000 / $15,000,000) × 100
    Cap Rate = 9.97%

    Property Type Considerations

    Net Operating Income calculations vary by property type due to different operating expense ratios:

    • Office: Higher expenses (30-40%) for HVAC, utilities, maintenance
    • Retail: Moderate expenses (25-35%) for common area maintenance
    • Industrial/Warehouse: Lower expenses (15-25%) for minimal tenant services
    • Multifamily: Moderate expenses (35-45%) including property management
    • Self-Storage: Lower expenses (25-35%) due to minimal maintenance

    Market lease rates and vacancy rates are specific to each property type and geographic location, reflecting local market conditions.

    Disclaimer

    These calculations are estimates for informational purposes only and should not be used as a substitute for professional financial analysis or appraisal.

    • Cap Rate calculations depend on market data that may change over time
    • Actual operating expenses, lease rates, and vacancy rates may differ from market averages
    • Individual property conditions, lease terms, and tenant quality significantly impact actual NOI
    • Property value estimates are approximations and not official appraisals
    • Cap rates vary widely by market, property condition, and investment risk profile

    Professional Guidance Recommended: Before making any investment or financial decisions, consult with licensed appraisers, commercial real estate brokers, and financial advisors who can evaluate your specific property and circumstances.
    By using this feature, you acknowledge that Realmo is not responsible for investment decisions or actions taken based on these estimates.

    Cap approach

    Capitalization Method calculates value based on estimated net operating income (NOI) and applying a market-based capitalization rate (cap rate), we estimate what a typical investor might be willing to pay for it.

    Comparable approach

    Comparable estimate is based on recent sales of similar nearby properties, adjusted for factors like size, condition, and location.

    Relative

    Relative property class coefficient uses factors that account for typical price differences between various asset types (e.g., retail vs. industrial) to provide a more accurate market-aligned estimate.

    Geo

    Comparable Sales Method, enhanced by Geo coefficients — location-based adjustment factors that reflect differences in price levels across neighborhoods, cities, or regions ensuring a more accurate, market-sensitive valuation.

    Stat Estimate

    This method estimates value based on actual market adjusted recent (~5 years) sales of comparable properties around by location and property type.

    • Ranges - area data calculated by industry standard IQR Outlier Removal Method
    • Range-from: 75% of all similar sales ($/sqft) are above this value
    • Range-to: 75% of all similar sales ($/sqft) are below this value
    AI Estimate

    This method estimates value based on AI market estimation of comparable properties around by location and property type.

    • Ranges - area data calculated by industry standard IQR Outlier Removal Method
    • Range-from: 75% of all estimations ($/sqft) are above this value
    • Range-to: 75% of all estimations ($/sqft) are below this value
    Alternative use

    Estimate considers the property’s potential value if used for a different purpose-based on zoning, demand, and market feasibility.

    More about this property
    Thanks! Your message was sent.
    Error! Your message wasn't sent.
    Please enter your name
    Please enter email
    Please enter the email in the correct format
    Please enter phone
    Please enter the number in the correct format
    Please enter message
    Thank You

    You are Unsubscribed From Notifications

    Thank You for Inquiry
    20 City Square, Charlestown, MA 02129
    letter with green check mark
    Check your email
    We sent you the
    agent's contact details. yellow underline
    Can't find it?
    Please check your junk/spam folder.
    Google sign-in failed. Please try again or use another login method.
    Sign Up Successful!
    You now have access to more from Realmo!