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Back$1,399,0004 bd4 ba2,429 sqft

$1,399,000For sale

519 Proton Place

San Marcos, CA 92078 · MLS# NDP2609182

Listing courtesy of Knopp Coastal Realty
  • 4Beds
  • 4Baths
  • 2,429Sq Ft
  • 2025Year Built

About This Home

BRAND-NEW LUXURY HOME WITH CITY VIEWS, MULTIGENERATIONAL LIVING & SUSTAINABLE DESIGN! Welcome to The Hill District in San Marcos, where innovative design, modern amenities, and a commitment to sustainability come together to create an exceptional modern lifestyle. This never-lived-in, 4-bedroom, 3.5-bathroom, three-story home offers 2,429 square feet of thoughtfully designed living space with luxury finishes throughout—and no carpet! This energy-conscious home features owned solar panels, wall batteries, an EV charger, and a Halo-5 whole-home water filtration system. Additional highlights include luxury vinyl flooring, designer window coverings, city and mountain views, an outdoor kitchen, and one of the largest yards in the neighborhood. FIRST FLOOR: Designed with flexibility in mind, the private bedroom and full bathroom can function as a guest suite, home office, gym, in-law suite, or multigenerational living space. The area can be closed off from the main residence and offers the potential for an attached junior ADU-style setup. It includes direct garage access, a washer/dryer, sink, and private access to the backyard and full outdoor kitchen. The outdoor kitchen features a built-in BBQ, 2-burner cooktop, mini refrigerator, and microwave. A spacious patio with luxury pavers and low-maintenance landscaping creates a sunny and inviting outdoor retreat. SECOND FLOOR: The heart of the home features a spacious open-concept great room with a beautifully appointed luxury kitchen and an impressive 23-foot-wide covered patio. The kitchen showcases white shaker cabinetry, white quartz countertops, stainless-steel appliances, an electric induction cooktop, smart refrigerator, reach-in pantry, and a large island with stainless-steel sink and seating for up to four. THIRD FLOOR: Three additional bedrooms, two full bathrooms, and a dedicated laundry room provide plenty of space and privacy. The spacious primary suite features a private balcony, two walk-in closets, a luxurious freestanding soaking tub, and a walk-in shower. The formal laundry room includes a brand-new washer and dryer set. And yes—there are two laundry areas, one serving each living space. The attached garage includes a covered driveway, providing the ability to accommodate two additional vehicles in front of the home. Outside, enjoy one of the neighborhood's largest yards, complemented by views of San Marcos city lights and surrounding mountains. The Hill District in North City is a thoughtfully planned community featuring innovative architecture, modern amenities, and sustainability-focused design. Planned and developing amenities include a luxury community center, pool, sports courts, and future parks. Conveniently located with immediate freeway access and close to restaurants, shopping, and everyday conveniences. Enjoy approximately 15 minutes to North San Diego County beaches, 30 miles to downtown San Diego, and 60 miles to Orange County. Brand-new construction, flexible living spaces, exceptional outdoor amenities, and modern sustainability features—this is the opportunity to experience a new standard of living in San Marcos.

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Property at a Glance: 519 Proton Place

This single family residence property at 519 Proton Place, San Marcos, CA 92078 is for sale at $1,399,000. The home has 4 bedrooms, 4 bathrooms and 2,429 square feet of living space. It was built in 2025. That comes to about $576 per square foot. Reach out to set up a showing or ask for more details about this home.

Snapshot

Status
For sale
Price
$1,399,000
Bedrooms
4
Bathrooms
4
Full Baths
3
Half Baths
1
Property Type
Single Family Residence
Year Built
2025
Square Feet
2,429
Days on Market
15
MLS #
NDP2609182
Price per Sq Ft
$576
County
San Diego

Nearby Schools

  • Elementary SchoolSan Marcos
  • Middle SchoolSan Marcos
  • High SchoolMission Hills

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Property Details

Building
Property Type: Single Family Residence
Year Built: 2025
Stories: 2
Land
View: City Lights, Hills, Mountain(s), Neighborhood
Lot Features: 0-1 Unit/Acre
Money
HOA Fee: $268 monthly
County: San Diego
Association: First Service
Rooms
Cooling: Central Air, Electric
Interior: Bedroom on Main Level, Entrance Foyer, Primary Suite, Utility Room, Walk-In Closet(s)
Fireplace: None
Laundry: Inside, In Garage, Laundry Room, See Remarks, Stacked, Upper Level
Structures
Garage Spaces: 2
Parking: Covered, Door-Multi, Direct Access, Driveway, Garage Faces Front, Garage, Garage Door Opener, Private, Side By Side
Pool: Community, Fenced, In Ground, See Remarks, Association

Living in San Marcos, CA

519 Proton Place is in San Marcos, CA, in San Diego County. It is served by San Marcos, San Marcos and Mission Hills. Ask Brad & Karen Mattonen about other homes for sale in San Marcos and what nearby homes have sold for.

Location

519 Proton Place, San Marcos, CA 92078 Open in Google Maps

Mortgage Calculator

Estimated Monthly Payment$7,074
$1,119,200Loan Amount
$279,800Down Payment
$1,427,478Total Interest

Principal and interest only. Taxes, insurance and HOA dues are extra.

Brad & Karen Mattonen Can Answer Your Questions About This Home

Why Work With Brad & Karen Mattonen?

Buying a home in San Marcos, CA goes better with a local agent on your side. Brad & Karen Mattonen can set up private showings, pull the latest numbers for the area, and guide you through the offer and the closing. Call 858-518-2875 to get started. Whether 519 Proton Place is the one or you would like to see other homes nearby, reach out any time.

Local facts

Facts and context beyond the MLS description

What the numbers say about 519 Proton Place and the San Marcos area around it.

Current market context

How this home compares in San Marcos

  • $576This home per sq ft
  • $523Median per sq ft
  • 58Homes for sale like it
  • 1Average days on market

At $576 per square foot, 519 Proton Place is priced about 10% above the $523 median for 4 bedroom homes for sale in San Marcos now.

Nearby sold homes

Recent sold homes near this property

Homes that sold within 1.25 miles of 519 Proton Place in the last 6 months, at a median price of $963,000.

AddressSoldHomeSold priceDistance
647 Fahrenheit DriveMay 8, 20263 bd · 4 ba · 1,504 sqft$835,0000.2 mi
477 Village GreensAug 12, 20264 bd · 3 ba · 1,931 sqft$1,000,0000.3 mi
492 ClubhouseOct 11, 20263 bd · 3 ba · 1,931 sqft$1,050,0000.3 mi
587 Gateway LaneSep 24, 20265 bd · 5 ba · 3,453 sqft$1,655,0000.4 mi
524 Avenida OrtegaJul 31, 20264 bd · 3 ba · 2,397 sqft$1,235,0000.4 mi
630 Sonoma StreetAug 28, 20264 bd · 3 ba · 2,052 sqft$926,0000.5 mi
428 San Marcos 162Apr 27, 20262 bd · 3 ba · 1,187 sqft$579,0000.6 mi
215 Westlake Drive 2Aug 26, 20262 bd · 3 ba · 931 sqft$499,0000.6 mi

Every home is different. Ask for a full price review before you make an offer.

Listing timeline

Price and status history

DateEventPrice
Oct 16, 2026Active$1,399,000

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