Sign Up Successful!
You now have access to more from Realmo!
    For Lease
    • For Sale
    • For Lease
    • Recently Sold
    • Property Lookup
    • Brokers
    AI Search
    Back to Search
    The Largest CRE Database in the US with Over 1 Million Listings

    11 S Mill St, Unit 404 New Castle, PA 16101

    Sponsored
    For Lease
    $500 /Mo ($1.38 SF/Yr)

    Office - New Castle, PA

    Type:Office
    Lot size:
    0.10 Acres
    Days on Market:
    348
    Last Refresh:
    Jan 25 at 4:06 pm

    Property Features for 11 S Mill St

    General Information

    Property type
    Commercial Lease
    Property subtype
    Office
    Standard status
    Active
    Zoning
    C-1
    Lot size
    0.10 Acres

    Building Details

    Architectural style
    Other

    We can help!

    Listing Contact
    Samantha Blundo

    Castle Realty (724) 654-5589

    Listing agent Samantha Blundo (724) 654-5589

    Listing date Feb 12, 2025

    MLS# 1688019 Listing URL

    Copyright © 2026 West Penn Multi List, Inc. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.

    Learn more

    Property Insight Report

    Overview

    Updated Office Space in Riverplex

    This updated single office space is located on the fourth floor of the historic Riverplex Complex in the heart of Downtown New Castle, Pennsylvania. Designed to enhance productivity, the modern office offers a quiet and comfortable environment with contemporary finishes and ample natural light. It is suitable for professionals seeking a personal workspace away from distractions. The space provides a professional atmosphere for client meetings or focused project work. The fourth floor includes multiple restroom facilities, a large elevator, and a public conference room. The property has a pristine, lighted parking lot offering specified spaces for employees and guests of the Riverplex, with multiple entrances on South Mill Street and E. Washington Street. The rent is all inclusive. The zoning is C-1. The lot size is 0.1 acres.
    Property Profile Insight Report Location Intelligence

    Current Use by Public Records

    Professional Dental Alliance, ... Dentist North American Dental ... Dentist Huntington Bank Bank Historic Warner Cascade ... Museum City Church Church

    Suggested Use

    Restaurant Realty agency Law Firm Building Supply Spa & Massage Dental Office Wholesale Shop Auto Repair Shop Hair Salon Clothing Store

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

    Location Insight

    • Map
    • Local Demand
    City
    New Castle
    County
    Lawrence
    State
    Pennsylvania
    Longitude
    -80.344069
    Latitude
    40.99974

    Nearby Similar for Lease

    • $3,900 /Mo
      45,302 SF

      Neshannock Twp Office Space Available

      Large office/medical space for lease with ample parking.
      3121 Wilmington Rd, New Castle, PA 16105
      View Details
    • $2,500 /Mo
      47,480 SF

      Office Space in Neshannock Twp

      Commercial house for professional office use in Neshannock Twp.
      2620 Wilmington Rd, New Castle, PA 16105
      View Details
    • $500 /Mo
      Pending

      Updated Office Space in Riverplex

      Modern office space in the heart of Downtown New Castle.
      11 S Mill St, New Castle, PA 16101
      View Details
    • $3,900 /Mo
      57,064 SF

      Office Space in Neshannock Twp

      Office space for lease in Neshannock Twp, Pennsylvania.
      2616 Wilmington Rd -, New Castle, PA 16105
      View Details
    • $1,900 /Mo
      45,302 SF

      Neshannock Township Office/Medical Space

      Office/medical space for lease in Neshannock Township, PA.
      3121 Wilmington Rd, New Castle, PA 16105
      View Details
    • $2,000 /Mo
      23,958 SF

      Versatile Space on High-Traffic Corner

      Adaptable space suited for food service, events, or retail.
      3420 Perry Hwy, New Castle, PA 16101
      View Details
    • $1,213 /Mo
      99,317 SF

      Neshannock Twp Office Space

      Trendy industrial style office space for rent in Neshannock.
      3009 Wilmington Rd, New Castle, PA 16105
      View Details
    • $2,300 /Mo
      462,172 SF

      Shenango Twp Office Space For Rent

      Commercial space with high visibility and ample parking.
      2630 Ellwood Rd, New Castle, PA 16101
      View Details
    • $1,650 /Mo
      462,172 SF

      Shenango Twp Office Space For Rent

      Commercial space with high visibility and ample parking.
      2626 Ellwood Rd, New Castle, PA 16101
      View Details
    • $3,500 /Mo
      462,172 SF

      Shenango Twp Office Space

      Commercial space with high visibility and ample parking.
      2640 Ellwood Rd, New Castle, PA 16101
      View Details
    • $800 /Mo
      57,064 SF

      Office Space in Neshannock Twp

      Office space available for rent in Neshannock Twp, PA.
      2616 Wilmington Rd, New Castle, PA 16105
      View Details
    • $2,014 /Mo
      99,317 SF

      Adaptable Office Space For Rent

      Commercial office front with adaptable space in high-visibility location.
      3009 Wilmington Rd, New Castle, PA 16105
      View Details

    FAQs

    What type of property is this?
    Office space - Modern office space in downtown New Castle's Riverplex Complex.
    Where is this office space located?
    The property is located at 11 S Mill St, Unit 404 New Castle, PA.
    What is the lease rate?
    The lease rate is $1.38 SF/Yr.
    What are key features of this property?
    This property features: - All-inclusive rent simplifies budgeting; - Prime Downtown New Castle location offers convenience and accessibility; - Updated, modern office space provides a professional and productive environment
    (724) 654-5589
    Request Owner's contact information
    11 S Mill St, Unit 404 New Castle, PA 16101
    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.
    11 S Mill St, Unit 404
    New Castle, PA 16101
    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
    11 S Mill St, Unit 404 New Castle, PA 16101
    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

    We can help!
    Listing Contact
    Samantha Blundo
    (724) 654-5589
    Learn more
    Google sign-in failed. Please try again or use another login method.
    Create New Password
    • At least 8 characters
    • Contains both letters and numbers
    • Contains uppercase and lowercase letters
    • At most 32 characters
    • Password required
    • Password reset link has expired. Please request a new one.