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Mark B Althoff

Mark B Althoff
Real Estate Agent (Salesperson)
Bel Air MD

Salesperson (MD: 663466)

10 years experience

REALTOR® 3 Active Listings Serves Harford County, MD
View on Realtor.com

Contact Information

Brokerage
Coldwell Banker Realty

Office Website
Office Address
5 Bel Air S Pkwy Ste 1467
Bel Air, MD  21015
(Harford County)
Office Phone
410-515-2000
Office Fax
Mobile
410-515-2000
Email
mark*********************@*****.com
Show Email for $5

Service Areas

Bel Air North: MD Jarrettsville: MD Forest Hill: MD Fallston: MD Riverside: MD Bel Air South: MD Bel Air: MD Aberdeen: MD Perryman: MD Edgewood: MD Abingdon: MD Belcamp: MD Pleasant Hills: MD Benson: MD Churchville: MD Darlington: MD Havre de Grace: MD Joppa: MD Joppatowne: MD Pylesville: MD Street: MD Whiteford: MD Cardiff: MD White Hall: MD Bowleys Quarters: MD Middle River: MD Rossville: MD White Marsh: MD Chase: MD Cockeysville: MD Hunt Valley: MD Fork: MD Glen Arm: MD Hydes: MD Kingsville: MD Bradshaw: MD Baldwin: MD Long Green: MD Lutherville Timonium: MD Towson: MD Mays Chapel: MD Lutherville: MD Hampton: MD Pikesville: MD Timonium: MD Monkton: MD Hereford: MD Parkton: MD Bentley Springs: MD Perry Hall: MD Jacksonville: MD Phoenix: MD Sparks: MD Glencoe: MD Sparks Glencoe: MD Essex: MD Rosedale: MD Baltimore: MD Edgemere: MD Dundalk: MD Catonsville: MD Woodlawn: MD Loch Raven: MD Parkville: MD

About Mark Althoff

Mark Althoff is a graduate of Old Dominion University with a degree in Therapeutic Recreation and an emphasis in psychology Mark grew up and has lived in the Baltimore Metropolitan area all his life After living in Baltimore City and Baltimore County primarily has resided in Forest Hill of Harford County MD for the last 20 years

Buying selling and rehabbing houses were hobbies for most of his life and he decided to formalize that knowledge and become a Realtor Mark’s intimate knowledge of Baltimore City Baltimore County and now Harford and Cecil Counties has served his clients well

Prior to this second career Mark devoted his time to nonprofit organizations specifically children with disabilities Most recently he worked 20+ years at The Maryland School for the Blind In his spare time you could have found him on soccer fields throughout the state or serving on the soccer board for the Hickory Fountain Green program

“Whatever it Takes”

But now with the exception of spending quality time with his wife four children and two young grandchildren he has fully committed himself to meeting the needs of his real estate clients from Cecil Baltimore Harford and Anne Arundel Counties and Baltimore City Whatever it Takes is his mantra and he has been known to mulch flower beds while clients are on a cruise and the landscaper falls through or shovel a deck and walkway while clients are looking for housing across the country

Testimonials

“Mark went above and beyond for our family and we felt truly blessed to have him as an agent His service was outstanding and we felt like we were dealing with an old friend He is an outstanding agent ” – JoAnn and Gary Durrett

Harford County, MD Real Estate Market Analysis (Single Family Homes)

$546,200
Avg. Listing Price
From Mark's portfolio
3.8 / 2.8
Avg. Beds/Baths
Typical property size
2,473 sf
Avg. Square Footage
Interior living space
538
Active Listings
Current inventory

Harford County, Maryland's real estate market represents a compelling blend of suburban growth and rural preservation, driven by its strategic position between Baltimore and the Delaware border. With 1,353 actively licensed agents serving the county, this market demonstrates remarkable depth for a region that balances agricultural heritage with modern residential development. The county's proximity to major employment centers like Aberdeen Proving Ground and Baltimore creates consistent housing demand across diverse price points.

What makes Harford County particularly intriguing is its dual personality - northern areas maintain rural character with larger lots and equestrian properties, while southern communities like Edgewood and Aberdeen offer more traditional suburban neighborhoods. This geographic diversity means agents must navigate everything from historic farmhouses in Jarrettsville to contemporary townhomes in Bel Air, requiring specialized local knowledge that the county's 1,353 email-accessible agents possess.

Major Harford County, Maryland Real Estate Markets

Bel Air serves as the county seat and primary residential hub, featuring established neighborhoods, excellent schools, and a thriving downtown district that attracts both families and young professionals. The Bel Air market includes everything from historic homes near the courthouse to newer developments like Hickory Ridge, creating opportunities across multiple price segments. Aberdeen and Havre de Grace represent the county's waterfront markets, with the latter offering unique Chesapeake Bay access that commands premium pricing.

The northern tier communities of Forest Hill, Jarrettsville, and Street showcase the county's rural appeal, where horse farms and expansive properties attract buyers seeking space and privacy. Meanwhile, Edgewood and Joppa serve as more affordable entry points, particularly popular with military families stationed at Aberdeen Proving Ground. This geographic spread means agents often specialize in specific corridors, from the rural north to the bay-influenced east.

Market Dynamics and Geographic Complexity

Harford County's market complexity stems from its role as both a Baltimore bedroom community and an independent economic center anchored by military and healthcare employment. The Aberdeen Proving Ground influence creates steady rental demand and frequent relocations, while the county's excellent school system in districts like Bel Air attracts long-term family buyers. Agricultural preservation programs in northern areas limit development, maintaining property values while creating scarcity-driven appreciation.

Transportation infrastructure significantly impacts market dynamics, with properties near I-95 commanding premiums for Baltimore commuter access, while areas along Route 1 and Route 40 serve regional commercial needs. The county's waterfront communities experience seasonal fluctuations, and rural properties often require specialized financing knowledge for acreage purchases or septic considerations that urban-focused agents might overlook.

Why Businesses Need Harford County, Maryland Agent Contact Data

The complete email accessibility of all 1,353 licensed agents creates unprecedented opportunities for service providers, lenders, and real estate technology companies to reach every active professional in this diverse market. Unlike fragmented contact databases, Harford County's comprehensive agent network allows businesses to target specific geographic specialties or demographic focuses with precision, whether reaching waterfront specialists in Havre de Grace or rural property experts in northern communities.

For businesses launching new services or expanding into Maryland markets, Harford County's manageable agent population combined with its market diversity provides an ideal testing ground. The mix of experienced agents handling luxury equestrian properties and newer agents serving first-time buyers creates opportunities for differentiated marketing approaches, while the county's growth trajectory ensures sustained engagement with business partners who establish relationships early.

Current Property Listings

As of 2/17/2026, Mark Althoff has 3 properties for sale in Bel Air and surrounding areas.

$340,000

Listed 2025-09-30

221 Glen View Ter
Abingdon, MD  21009

Beds: 3.0
Baths: 2.5
Sq Ft: 2,220
Lot: 2,178 sf
Townhomes Map
View Full Details

$475,000

Listed 2026-01-09

3204 Meadow Valley Dr
Abingdon, MD  21009

Beds: 4.0
Baths: 2.5
Sq Ft: 1,778
Lot: 7,841 sf
Single Family Map
View Full Details

$299,500

Listed 2025-09-19

406 Ford St
Aberdeen, MD  21001

Beds: 3.0
Baths: 1.5
Sq Ft: 1,616
Lot: 5,227 sf
Single Family Map
View Full Details

Current Property Rentals

Mark Althoff currently has no rental properties available in Bel Air and surrounding areas. Check back later.