Office Building with Commercial
For Sale
$2,490,000
505 County Line Road, Rockwall, TX 75032
SINGLE_FAMILY - Rockwall, TX
Property Size6,750 SF
Lot Size4.67 Acres
Price / SF$368.89
Days on Market80
Property Features for 505 County Line Road
General Information
Property type
Residential
Property subtype
Office
Zoning description
4.67-acre Rockwall site with a 6, 750 sq ft building. Zoned Commercial (C) for high-intensity retail/office. Specs: 60' max height, 60% coverage, 2:1 FAR. Ideal for mixed-use or medical. Contact City of Rockwall for details.
Subdivision
W W Ford
Lot features
Acreage, Corner Lot
Directions
Exit I-30 at Horizon Rd (Exit 68) and head south for 1.2 miles. Pass Ridge Rd and continue straight. Turn right onto County Line Rd just past the residential area. Follow the road for about 0.2 miles; 505 County Line Road will be on your right. The total trip takes roughly five minutes.
Standard status
Active
APN
000000051139
Lot size
4.67 Acres
Taxes and HOA fees
Tax Description
ABS A0080, W W FORD, TRACT 26-1 & 26-3, 4.6749
Tax Annual Amount
16720
Legal Description
ABS A0080, W W FORD, TRACT 26-1 & 26-3, 4.6749
Utilities
Sewer type
Public Sewer
Water source
Public
Building Details
Year built
2001
Floors in Building
1
Number of units
1
Flooring type
Concrete
Building materials
MetalSiding
Roof type
Metal
Listing Agency:
Legacy & Co. Real Estate LLC
(972) 771-5106
Listed By:
Justin Holland · License #0560450
(972) 771-5106
Added: Jun 2
Changed: Aug 14
Last Checked: Aug 20 at 1:06AM
MLS# 21248380
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.
Investment Insights
Based on property information with market context.
The property includes a 6,750-square-foot office building constructed in 2001. The structure features metal siding, a metal roof, and concrete flooring, with public water and public sewer serving the site.
Located at 505 County Line Road in Rockwall, the 4.6749-acre property carries Commercial (C) zoning. The designation supports professional offices, medical clinics, retail stores, personal services, health clubs, gyms, and indoor commercial recreation, while certain restaurant and financial institution uses require specific conditions. Site standards include a maximum building height of 60 feet, maximum lot coverage of 60 percent, a 2:1 FAR, and landscaping equal to at least 20 percent of the total site.
Located at 505 County Line Road in Rockwall, the 4.6749-acre property carries Commercial (C) zoning. The designation supports professional offices, medical clinics, retail stores, personal services, health clubs, gyms, and indoor commercial recreation, while certain restaurant and financial institution uses require specific conditions. Site standards include a maximum building height of 60 feet, maximum lot coverage of 60 percent, a 2:1 FAR, and landscaping equal to at least 20 percent of the total site.
Key Highlights
- 4.6749‑acre commercial property at 505 County Line Road, Rockwall, TX 75032
- Existing 6,750‑square‑foot office building
- Commercial (C) zoning supports office, medical, retail, and personal service uses
Financial Insights
Estimated NOI and Cap Rate
NOI = area × lease_rate × (100 − vacancy) / 100 × (1 − expense_ratio). Net Operating Income — what the owner takes home each year before mortgage payments and income tax. Effective rent (asking rent minus vacancy losses) minus operating costs (taxes, insurance, maintenance, management).
NOI / Yr
$112,908
Cap rate = NOI / list price × 100. Capitalization rate — annual return on a fully cash purchase, before financing. NOI divided by price. Higher means more income per dollar invested, but usually also more risk or older condition. 5–8% is typical for stabilized commercial property; double digits often signal distressed deals.
Cap Rate
4.53%
Suggested Prices Based on Cap Rates
Cap rates vary significantly by property type, market, and asset quality.
Typical U.S. stable-market ranges:
Multifamily — 4.5% to 6.5% (Class A in primary markets often sub-5%; Class C in secondary markets 6%+)
Industrial / Logistics — 5.0% to 7.0% (compressed heavily in recent years due to e-commerce demand)
Office — 6.5% to 9%+ (wide spread post-2020; CBD Class A vs. suburban Class B varies dramatically)
Retail — 5.5% to 8.5% (grocery-anchored on the low end, unanchored strip centers higher)
Hospitality / Hotels — 7.5% to 10%+ (higher due to operational risk)
Self-Storage — 5.5% to 7.5%
Medical Office — 6.0% to 7.5%
Net Lease (single tenant, credit) — 5.0% to 7.0% depending on tenant credit and lease term
Rules of thumb:
Primary markets (NYC, SF, LA, Boston, DC) trade at lower cap rates than secondary/tertiary markets, often by 100–200 bps (bps, aka basis points; 1 bp = 0.01%).
Class A assets trade ~50–150 bps tighter than Class B, and Class B tighter than Class C.
Cap rates move inversely with price — a lower cap rate means a higher price for the same NOI.
Spread to the 10-year Treasury is a common benchmark; historically 200–400 bps over the 10-year.
Cap Rate 5%
$2,258,160
$2.3M
Cap Rate 7%
$1,612,971
$1.6M
Cap Rate 9%
$1,254,533
$1.3M
Market Conditions
NOI Build-Up for 6,750 SF
Vacancy — income lost from leasable area expected to sit empty during the year, subtracted from gross rent.
EGI (Effective Gross Income) — gross rent minus vacancy losses, the realistic income before paying operating costs.
OpEx (Operating Expenses) — recurring costs to operate the property (property tax, insurance, utilities, maintenance, management); excludes financing and capital improvements.
NOI (Net Operating Income) — income a property generates after operating costs but before financing and taxes.
Gross rent
$207.4K $30.72/SF
− Vacancy
−$56.8K −$8.42/SF
EGI
$150.5K $22.30/SF
− OpEx
−$37.6K −$5.58/SF
NOI
$112.9K $16.73/SF
Area
Rockwall County, TX
Vacancy
27.40%
Lease Rate
$30.72 /SF/Yr
Expense Ratio
25.00%
Simulate Cap Rate and NOI
Suggested Prices Based on Cap Rates
Cap rates vary significantly by property type, market, and asset quality.
Typical U.S. stable-market ranges:
Multifamily — 4.5% to 6.5% (Class A in primary markets often sub-5%; Class C in secondary markets 6%+)
Industrial / Logistics — 5.0% to 7.0% (compressed heavily in recent years due to e-commerce demand)
Office — 6.5% to 9%+ (wide spread post-2020; CBD Class A vs. suburban Class B varies dramatically)
Retail — 5.5% to 8.5% (grocery-anchored on the low end, unanchored strip centers higher)
Hospitality / Hotels — 7.5% to 10%+ (higher due to operational risk)
Self-Storage — 5.5% to 7.5%
Medical Office — 6.0% to 7.5%
Net Lease (single tenant, credit) — 5.0% to 7.0% depending on tenant credit and lease term
Rules of thumb:
Primary markets (NYC, SF, LA, Boston, DC) trade at lower cap rates than secondary/tertiary markets, often by 100–200 bps (bps, aka basis points; 1 bp = 0.01%).
Class A assets trade ~50–150 bps tighter than Class B, and Class B tighter than Class C.
Cap rates move inversely with price — a lower cap rate means a higher price for the same NOI.
Spread to the 10-year Treasury is a common benchmark; historically 200–400 bps over the 10-year.
Cap Rate 5%
$2,258,160
Cap Rate 7%
$1,612,971
Cap Rate 9%
$1,254,533
Alternative Uses
Best Use
Office B
$1.61M
$1.41M – $1.88M
NOI $112,908 @ 7.0% cap · market cap 4.53%
Second Best
Mixed Use
$998.0K
$873.3K – $1.16M
NOI $69,863 @ 7.0% cap · market cap 2.81%
Theoretical Best
Hotel Hospitality
$5.08M
$4.45M – $5.93M
NOI $355,894 @ 7.0% cap · market cap 14.29%
Zoning and permitted uses should be independently verified with authorities.
Property Analytics
Property Profile
Current Use
Location Intelligence
Trade Area within ½ mile
139
Businesses Nearby
Explore this area
Business Placement
Demographics for 75032, TX
34,590
Population
13,453
Households
2.6
Avg Household Size
40
Median Age
50%
College-Educated
95%
High-School Grad
48.1 sq mi
ZIP Area
719
Density / Sq Mi
$128,465
Median Household Income
$60,480
Median Earnings
$1,918
Median Rent
$462,000
Median Home Value
Market
Vacancy Rate% for Office in South region
Questions? Ask Rey
Realmo’s AI knows this listing — price, zoning, demand, history. Ask anything.
Frequently Asked Questions
What type of property is this?
Office building - Existing office improvements sit on a sizable commercial tract with public water and sewer service.
Where is this office building located?
The property is located at 505 County Line Road Rockwall, TX.
What is the asking price?
The asking price for this property is $2,490,000.
What are key features of this property?
This property features: 4.6749‑acre commercial property at 505 County Line Road, Rockwall, TX 75032; Existing 6,750‑square‑foot office building; Commercial (C) zoning supports office, medical, retail, and personal service uses
