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    Waterfront Residential Homesite Title is generated by Realmo AI

    812 Sir Galahad Lane, Lewisville, TX 75056

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    Claim this Listing
    For Sale
    $4,750,000

    LAND - Lewisville, TX

    Lot size:
    0.72 Acres
    Added:
    Apr 18, 2026
    Days on Market:
    47
    Last Refresh:
    Jun 3 at 4:06 am

    Property Features for 812 Sir Galahad Lane

    General Information

    Property type
    Land
    Property subtype
    Other
    Standard status
    Active
    APN
    R200207
    Lot size
    0.72 Acres

    Taxes and HOA fees

    Tax Description
    CASTLE HILLS PH I SEC C BLK W LOT 18
    Tax Annual Amount
    6781

    Utilities

    Sewer type
    Public Sewer
    Water source
    Public

    We can help!

    Listing Contact
    Steve Koleno

    Listing agent Steve Koleno License #0779766

    Listing office Beycome Brokerage Realty LLC Miami, TX

    Listing date Apr 18, 2026

    MLS# 21002287 Listing URL

    Copyright © 2026 North Texas Real Estate Information Systems, Inc. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.

    HighLights

    • Land‑only homesite in Castle Hills Estates (Lewisville), part of a master‑planned community
    • Public water and public sewer available
    • Utilities are ready for connection
    • Capable of supporting a 15,000+ sqft home
    • Topography may allow for a basement
    • Front of the homesite faces a 4+ acre lake, parks, and green space leading to a golf course

    Overview

    Set within the Castle Hills Estates luxury subdivision, this waterfront homesite is ready to build with utilities already in place. The property’s topography provides options for a basement, supporting plans for a large-format showplace home of 15,000+ square feet, with room to incorporate features like a multi-car garage, elevator, and observation deck.

    Located at 812 Sir Galahad Lane in Lewisville, Texas, the front of the homesite faces a four+ acre lake along with parks and green space that lead to a nearby golf course. The setting also offers steps-to-parks and trails, plus neighborhood shopping and dining within the community.

    Ideal for buyers looking for a generational build in a fully developed, master-planned environment, this site supports custom design at your pace. While no country club membership is tied to the property, membership options at a private golf course and country club may be selected separately for social, golf, or tennis use. For investors and builders, it’s a straightforward land-only opportunity where the value is in the site’s waterfront orientation and luxury-ready build potential.
    Property Profile Location Intelligence

    Current Use by Public Records

    Residential land & home ...

    Map

    City
    Lewisville
    County
    Denton
    State
    Texas
    Longitude
    -96.896566
    Latitude
    33.038525

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    FAQs

    What type of property is this?
    Residential land & home lot - Waterfront homesite in Castle Hills Estates with utilities in place, offering room for an expansive luxury build.
    Where is this residential land & home lot located?
    The property is located at 812 Sir Galahad Lane Lewisville, TX.
    What is the asking price?
    The asking price for this property is $4,750,000.
    What are key features of this property?
    This property features: Land‑only homesite in Castle Hills Estates (Lewisville), part of a master‑planned community; Public water and public sewer available; Utilities are ready for connection
    (844) 239-2663
    We can help!
    Listing Contact
    Steve Koleno
    Real Estate License ID: 0779766
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    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.

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