Mark Costello

Weatherford, Texas

Top DFW Realtor | 100+ 5-Star Reviews | Full-Service Real Estate

We’re Mark and Brandy Costello, a Weatherford-based husband-and-wife real estate team serving Parker County and the greater DFW area. Originally launched in North Dallas (Collin County), we’ve built a track record that places us in the top 10% of agents across DFW, backed by over 100 five-star reviews from clients who value our personal, hands-on approach.

While our primary focus is residential real estate, our expertise also covers farm and ranch properties, light commercial transactions, and multi-family investment sales and leasing.

Mark’s experience in residential and commercial construction and renovations provides clients with insights most agents simply can’t offer. Brandy’s background in property appraisal and eye for design help clients envision the full potential in every home or investment.

For investor clients, we offer a true full-service experience. The Costello Group is supported by Costello Property Management, providing comprehensive property management services for single-family and multi-family portfolios — ideal for clients looking to expand and protect their investments.

When you choose us, you work directly with us. We don’t delegate your journey to assistants or pass you off mid-process. From start to finish, we handle every detail with clear communication, personal attention, and proven experience.

We’re also the proud parents of three boys, and we understand how life-changing real estate can be — it transformed our family’s future, and we’re passionate about helping it transform yours.

 

Our commitment is to deliver the most current market data available, and we pride ourselves on being a team of caring, knowledgeable professionals dedicated to guiding you through every step of buying or selling your home.

Newest Listings

536 Longshore Dr, Little Elm
$1,699,000
3 Beds ⋅ 4 Baths ⋅ 21394098 MLS
Rare opportunity to own almost an acre, pie shaped lakefront lot in town! Property is on city water & city sewer, also rare for larger lake lots on Lake Lewisville & the yard is on sprinklers. This custom home is turn key, was thoughtfully planned & features the best amenities! You will love spending time overlooking the lake in your sparkling pool & spa which has recently been resurfaced, on the covered patio, on your balcony, on your screened-in porch or perhaps from the window seats. Many gorgeous architectural features inside to wow you. Lots of woodworking & custom cabinetry & beautiful quartz counters, built in refrigerator & gas stove, recirculating hot water means never having to wait for it to warm up on a cold day. Wood floors to keep allergies at bay. Master bedroom has marvelous views, is spacious & luxurious with lighted tray ceiling & 12' ceilings which are actually featured throughout the home. The master bath has marble floors, tons of counter space & a make-up area. Electricity inside the cabinets to tuck away your toothbrush, razor, etc. The shower has a rain head & big bench, deep Jacuzzi tub & 2 huge walk-in closets. Office could be a 2nd downstairs bedroom & while is currently only serviced by a half bath, there is room to build out a shower if needed. Upstairs are two more bedrooms, & baths, a game room & lots of walk out attic space. The owners considered finshing out one of the attic spaces with another 2 bedrooms & 2 baths. There is that much room, so lots of flexibility on how to finish it out, or just leave as lots of storage. All patios have travertine floors & the fireplace is gas logs but could be reverted to woodburning. Love cars? So do the owners. Its a 4 car garage complete with plug-in for your electric car. Double gates down to the lake make it a snap to mow or take your water toys down. 3 AC units for multiple zones, roof replaced 2025. The only thing that's left to do is move in and start living the lake life!

536 Longshore Dr, Little Elm
3011 Country Club Dr, McKinney
$1,499,999
4 Beds ⋅ 5 Baths ⋅ 21418584 MLS
The long awaited sale of this McKinney LEGEND is here! Welcome to one of the most recognized and iconic homes in McKinney, affectionately known as the 'McKinney White House.' This home boasts a sublime location near a small lake featuring a walking trail and greenbelt area. If your buyer is interested in the exclusive community of Village Creek, then this is the home for them. The upstairs area is perfect for a multi generational family, mother in law suite, or college student living at home. This upstairs area has its own PRIVATE ENTRANCE, FULL KITCHEN, 2 FULL BATHS, 2 BEDROOMS with balconies, LIVING AREA and LOFT. The ample first floor has a beautiful library with floor to ceiling book shelves, hardwood floors, an additional bedroom which could also be used as another home office, and large utility room with access to the primary bedroom closet for laundry day. Relax by the tranquil pool or in the peaceful atrium with Koi pond. Enjoy the views of the small lake and walking trails as you listen to the soothing water fountain. This is undoubtedly one of the most beautiful homes and subdivisions in town and now is your chance!

3011 Country Club Dr, McKinney
8304 Western, The Colony
$1,210,000
4 Beds ⋅ 3 Baths ⋅ 21404747 MLS
Experience extraordinary lakeside resort living in this luxurious single-story ranch featuring 4 bedrooms, breathtaking lake views, a rare 5-car garage, and a spectacular backyard oasis. Inside, rich natural hardwood floors, plantation shutters, soaring ceilings, abundant natural light, and a whole-home water filtration system reflect exceptional attention to detail. The grand living room showcases dramatic vaulted ceilings, a stone fireplace, and expansive windows overlooking the pool and lake. Designed to impress, the chef-inspired kitchen boasts stainless steel appliances, double ovens, a professional-grade gas cooktop, hidden spice racks, an oversized island with farmhouse sink, and abundant cabinetry. A thoughtfully designed split-bedroom layout provides privacy, while the serene primary suite features expansive windows, a striking brick accent wall, and a spa-inspired ensuite bath. The exceptional 5-car garage with side-by-side doors offers ample room for vehicles, storage, or a home gym. Outdoors, your private paradise awaits! A heated saltwater pool and spa feature a cascading rock waterfall, grotto, and jumping ledge, surrounded by lush landscaping and generous spaces for relaxing and entertaining. With no rear neighbors, unobstructed lake views, and the shoreline just steps away, this retreat offers remarkable privacy and natural beauty. Located in the award-winning Tribute Lakeside Resort & Golf Community, residents enjoy championship golf courses, resort-style amenities, scenic nature trails, and the beauty of Lake Lewisville. From the moment you arrive, refined finishes and inviting spaces create an atmosphere of easy elegance. Whether hosting lively gatherings beside the pool, enjoying calm mornings overlooking the water, or taking advantage of the community's excellent recreational offerings, every day feels like a getaway in this beautiful lakeside setting. More than a home, this is an exceptional opportunity to embrace the finest in lakeside luxury.

8304 Western, The Colony
5921 Hawkeye Rd Unit A, Krum
$3,900,000
3 Beds ⋅ 3 Baths ⋅ 21409904 MLS
Discover your dream luxury estate in Krum, Texas! This exceptional property combines country living, luxury, and functionality with a custom home, shops, barns, a pond, a gated entrance, and an automatic-start propane generator for peace of mind during power outages. Whether you envision a private retreat or a potential wedding venue, the possibilities are endless! Event venue use is subject to applicable approvals. The main home is an entertainer’s dream, featuring custom wood floors, soaring cathedral ceilings, striking beams, and a magnificent 20-foot Austin stone fireplace visible from the kitchen and living room. The open layout creates the perfect setting for everyday living and memorable gatherings. The gourmet kitchen boasts double islands, a farmhouse sink, stainless steel appliances, a Sub-Zero refrigerator, and a Thor six-burner stove with griddle. A spacious pantry with built-ins and a generous dining room complete this inviting space. The luxurious primary suite features two separate bath spaces and two dressing areas. Additional highlights include an office, mudroom, mother-in-law suite, and custom closet built-ins. Enjoy mornings on the enclosed sun porch or relax by the custom pool and hot tub while taking in the country views. Bring your equipment and business to the 60' x 60' air-conditioned shop with living quarters! This versatile space is perfect for operating your business from home, with room for equipment, projects, and workspace. Enjoy combining your home and business in one location! Additional shop space and barns provide flexibility for storage, hobbies, and equipment, while the pond adds to the property’s country charm. Whether you’re looking for a luxury estate, a home-based business opportunity, or a potential wedding venue, this one-of-a-kind property offers space, comfort, and possibilities close to town. Don’t miss this all-in-one property! Make your country-living dreams a reality in Krum, Texas!

5921 Hawkeye Rd Unit A, Krum
5921 Hawkeye Rd, Krum
$4,500,000
3 Beds ⋅ 3 Baths ⋅ 21386288 MLS
This can be your dream luxury estate—or a picturesque setting for a potential wedding venue—close to town in the heart of Krum, Texas! Featuring two custom homes, two shops, barns, a pond, a gated entrance, and an automatic-start propane generator, this exceptional property offers endless possibilities for multigenerational living, entertaining, and country luxury. Wedding and event venue use would be subject to applicable approvals. The main house is an entertainer’s dream, featuring custom wood floors, soaring cathedral ceilings, striking beams, and a magnificent 20-foot Austin stone fireplace visible from the kitchen and living room. The gourmet kitchen boasts double islands, a farmhouse sink, stainless steel appliances, a Sub-Zero refrigerator, and a Thor six-burner stove with griddle. A spacious pantry and dining room complete this inviting space. The luxurious primary suite features two separate bath spaces and dressing areas. An office, mudroom, mother-in-law suite, and custom closet built-ins add convenience. Enjoy coffee on the enclosed sun porch or relax by the custom pool, hot tub, and outdoor living area while taking in the peaceful views. The second custom home offers additional space for family or guests. Bring your equipment and your business to the 60 x 60 air-conditioned shop! With living quarters on the property, it’s perfect for anyone wanting to run a business right at home. The additional shop and barns provide versatile space for equipment, storage, and projects. With its peaceful pond, spacious grounds, convenient location, and automatic-start propane generator for added peace of mind during power outages, this property offers endless potential as a private estate, home-based business, or possible wedding venue. Don’t miss out on this all-in-one property!

5921 Hawkeye Rd, Krum
12024 Blake Pl, Frisco
$5,000,000
6 Beds ⋅ 8 Baths ⋅ 21388935 MLS
Rare lakefront luxury in an exclusive gated community of one-of-a-kind custom homes in Frisco! Built in 2024, this nearly 7,000-square-foot retreat offers 6 bedrooms, 8 baths, 11-foot main-level and 10-foot upper-level ceilings, and breathtaking Lake Lewisville views throughout. Walls of glass frame sunsets, an oversized infinity-edge pool, 10-person spa and fire pit. A floating dock offers direct lake access for boating and watersports, near miles of wooded trails. A private wellness retreat features a gym, sauna and cold plunge. An 8-foot linear fireplace anchors a 21-foot architectural mantel. Highlights include an expansive upstairs game room, custom-built office, theater, whole-home audio, hardwired security cameras, primary bath atrium, pool bath and third-floor eagle’s nest. A four-car garage with soaring two-story height was designed for a custom indoor half basketball court or recreation space. Set on approximately half an acre, minutes from Frisco’s premier amenities.

12024 Blake Pl, Frisco
6491 Peden Rd, Fort Worth
$1,900,000
3 Beds ⋅ 3 Baths ⋅ 21417351 MLS
Boasting 70 feet of open-water frontage on Eagle Mountain Lake, a private boat dock, and a swimming pool and spa, 6491 Peden Road offers an exceptional waterfront setting on 0.99 acres of fully fenced property. With direct lake access, nearly an acre of land, and two separate residences, this property offers a rare combination of privacy, space, and versatility. The main residence features three bedrooms, three full bathrooms, and a spacious floor plan designed for comfortable everyday living and entertaining. A first-floor primary suite provides convenience and privacy, while two dining areas offer flexibility for both casual meals and larger gatherings. Upstairs, a generous bonus room provides additional space for a game room, media room, or secondary living area. Complementing the main residence is a separate guest house featuring two bedrooms, a full bathroom, kitchen, living and dining areas, dedicated office, and laundry room. Offering its own complete living accommodations, the guest house is ideal for hosting extended family and overnight visitors while maintaining privacy between the two residences. The property's private boat dock makes enjoying Eagle Mountain Lake effortless, whether heading out for a day on the water or returning home to relax by the pool and spa. With 70 feet of open-water frontage, expansive fully fenced grounds, and the flexibility of a separate guest residence, 6491 Peden Road offers a distinctive opportunity to enjoy lakefront living with space for family, guests, and entertaining.

6491 Peden Rd, Fort Worth
3097 Whispering Oaks Dr, Highland Village
$1,975,000
4 Beds ⋅ 4 Baths ⋅ 21397152 MLS
Stunning waterfront Mediterranean estate on Lewisville Lake! Located on a premium 0.43-acre cul-de-sac lot in the prestigious Overlook at Highland Shores, this 4BR, 3.5BA, 4,215 sq ft home offers unparalleled privacy and unobstructed panoramic water views. Inside features dramatic vaulted ceilings, rich hardwoods, and elegant decorative lighting. The gourmet kitchen boasts quartz countertops and a massive eat-in island that opens seamlessly to a family room with a floor-to-ceiling stone fireplace. Main floor hosts the private primary suite, custom closets alongside a dedicated executive office, craft room or Bedroom 5. Upstairs, find 3 spacious bedrooms, a media room with striking lake vistas. The open-concept living room anchored by a floor-to-ceiling stone gas fireplace surrounded by elegance. The resort-style backyard includes a massive tiered patio looking out onto pristine water. Pull your boat right up to your own 30 foot EZ removable floating dock with 2 Jet Ski roller lifts, and Kayak. Seller will sell his Pontoon Boat currently at nearby Eagle Point Marina. 3-car garage - A rare chance to own the shoreline!

3097 Whispering Oaks Dr, Highland Village
7012 Da Vinci, Colleyville
$1,599,900
5 Beds ⋅ 5 Baths ⋅ 21409593 MLS
Your backyard extends with views of the community POND, PARK, walking TRAILS and GREENBELT! Nestled in the highly desirable Reserve at Colleyville, this stunning Mediterranean-style residence offers timeless elegance and exceptional curb appeal. Beautifully landscaped grounds welcome you into an impressive entry featuring soaring ceilings and rich hardwood flooring. Thoughtfully designed for both everyday living and entertaining, the open-concept floor plan showcases a private office, plantation shutters, and an inviting living room with a fireplace and expansive windows overlooking the lush backyard. The spacious eat-in kitchen features granite countertops, stainless steel appliances, a gas cooktop, and an oversized island with breakfast bar seating. The main level offers a convenient powder bath, private guest bedroom with full bath, and a luxurious primary suite featuring a spa-inspired bath with a jetted soaking tub, oversized walk-in shower, and generous space to unwind. Upstairs, enjoy a spacious game room, a bedroom with an ensuite bath, and two additional bedrooms connected by a Jack-and-Jill bath. Step outside to your own private backyard retreat, complete with a sparkling pool, covered patio, and charming cabana—perfect for relaxing or entertaining in style. Combining sophisticated interiors, exceptional outdoor living, and a beautiful setting, this remarkable home offers luxury living in one of Colleyville's most sought-after communities. Conveniently located between Dallas and Fort Worth, minutes from the DFW International Airport. Nearby Southlake Town Square and Historic Downtown Grapevine offer endless dining and shopping options! You can join the Keller ISD or apply for Grapevine Colleyville ISD. This is a rare location and a gem of a home!

7012 Da Vinci, Colleyville
5110 Park Ln, Dallas
$8,875,000
21402281 MLS
1.67 acres in the heart of Preston Hollow, where rolling terrain is threaded by a meandering creek and sheltered beneath a native canopy of bald cypress, cedar, live oak, and red oak. A double line of bald cypress announces the drive, and from the first turn onto the property the scale of the land is unmistakable. The ground is as workable as it is beautiful. Some 23,000 square feet of manicured turf opens across the site — room enough for a pool, a tennis court, and a pickleball court at once, with land to spare for the residence that overlooks them. The creek and the rise and fall of the terrain give the parcel what flat lots cannot: natural privacy, elevation, and a sense of arrival that no amount of landscaping can manufacture. The site has already proven what it can carry. The existing residence — a limestone-and-copper nautilus by architect Michael Murphy — totals more than 17,000 square feet across the main house and attached natatorium, with infrastructure in place. A buyer may restore it, reimagine it, or begin again on a canvas few Dallas parcels can match. Preston Hollow’s coveted location provides immediate access to Highland Park Village and Inwood Village, top private schools, and Love Field Airport, connecting residents to both neighborhood amenities and the broader metroplex.

5110 Park Ln, Dallas
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Listings provided by North Texas Real Estate Information Systems (NTREIS). Listing data has been deemed reliable but is not guaranteed to be accurate by the MLS.

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