For Sale: 519 Proton Place, San Marcos, CA 92078. 4-bedroom 3.5-bath, 2429 sf, 2025 Hill District $1,399,000 begin new search
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Overview

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.

Address 519 Proton Place

San Marcos, CA 92078
Listing Status ACTIVE
Asking Price $1,399,000
On Market Date $1,399,000 @ Oct 1, 2026
Rooms
Primary Bedroom, Primary Bathroom, Foyer, Primary Suite, Laundry, Main Floor Bedroom, Office, Living Room, Family Room, Formal Entry, Great Room, Entry, Multi-Level Bedroom, Kitchen, Utility Room, Walk-In Closet
Square Footage 2429 sf
Bedrooms 4
Full Bathrooms 3
Half Baths 1
Interior
Bathrooms Total Integer4
Beds4
Est SF2,429
Full Bathrooms3
Laundry YN1
Living Area SourceAssessor
Main Level Bathrooms3
Main Level Bedrooms3
Half Bathrooms1
Rooms Total0
Serchbl RmsPrimary Bedroom,Primary Bathroom,Foyer,Primary Suite,Laundry,Main Floor Bedroom,Office,Living Room,Family Room,Formal Entry,Great Room,Entry,Multi-Level Bedroom,Kitchen,Utility Room,Walk-In Closet
Tot Bds0
Location
Address519 Proton Place
Addr Number519
Addr StreetProton
Add Srch Num519
CitySan Marcos
DirUse GPS. Follow signs past Shea's model homes in the back of the community to find Proton Street.
Elementary SchoolSan Marcos
Elementary School URLSMOELE
Geo Latitude33.133218
Geo Longitude-117.167578
Geo Match Code0
Geo Matched Method0
Geo Quality0
Geo Zoom Level0
High SchoolMission Hills
High School DistrictSan Marcos Unified
Market Area92078 - San Marcos
Middle SchoolSan Marcos
Middle School URLSNMMID
NeighborhdHill District
StateCA
Street SuffixPlace
Waterfront YNNo
Zip92078
Condominium
AssessmentNone
Assessments YN0
Association Dues 20
Association Fee20
Association Fee FrequencyMonthly
Association YN1
HOA Fee$268.00
Financial
Electric Expense0
Fuel Expense0
Gross Income0
Insurance Expense0
Land Lease YNNo
Lease Amount0
Maintenance Expense0
Manager Expense0
Net Operating Income0
Other Expense0
Professional Management Expense0
Tax Annual Amount$0.00
Tax Year0
Trash Expense0
Water Sewer Expense0
Seller Consider Concession YN0
Sale History
Concessions Amount0
Sold Price0
Exterior
Cmplx Units35
Entry Location1
Ent Stps1
Excl Yrd0
Lot Features0-1 Unit/Acre
Lot SFApx0.00
Lot Size Acres0
Lot Size SourceEstimated
Lot Size UnitsSquare Feet
Patio YN0
PoolAssociation,In Ground,Fenced,Community,See Remarks
Pool Private YN0
Property Attached YNNo
Spa0
StyleSingle Family Residence
Total Stories3
ViewMountain(s),City Lights,Neighborhood,Hills
Lot Size Area0
Horse YNNo
Parking
Attached Garage YNYes
Carport Spaces0
Number Remotes1
Parking FeaturesGarage,Covered,Direct Garage Access,Garage Faces Front,Driveway,Private,Side by Side,Garage Door Opener,Garage - Two Door
Parking Garage Spaces2
Parking Non Garage2.00
Parking Total4
Parking YN1
Garage YNNo
Carport YNNo
Basement
Below Grade Finished Area0
Basement YNNo
Features
Additional Parcels YNNo
Appliances YN0
Asctn AmntsCall for Rules,Hiking Trails,Management,Biking Trails,Pet Rules,Pickleball,Pool,Outdoor Cooking Area,Barbecue,Recreational Park,Clubhouse,Maintenance Front Yard,Playground
Common WallsNo Common Walls
Complx FtrsCurbs,Biking,Dog Park,Hiking,Street Lights,Storm Drains,Sidewalks,Suburban,Park
CoolingElectric,Central Air
Cooling YN1
Direction FacesEast
Fireplace0
FPNone
Heating YN0
High School2MMHHS
Keyword0
Landry LctnInside,Individual Room,In Garage,Upper Level,See Remarks,Stackable
LevelsTwo
Living Area UnitsSquare Feet
New Construction YNNo
Number Of Units Total0
Sprinklers YN0
View YN1
Well Depth0
Well Gallons Per Minute0
Well Pump Horsepower0
Well Report YN0
Condition
Yr Blt2,025
Yr Built SrcBuilder
Listing Information
Assoc IDNorth San Diego County
LA1 First NmGino
LA1 Last NamTinucci
IDXContact Infoginosellsre@gmail.com
Listing History
Timeline Notes
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Public Records
County San Diego
Assessor Parcel# 2201720728
Zoning R1
Geographic Areas

Community College District: Palomar CC

Zip Code: 92078

Highway Locator

West of I-15

East of I-5

North of I-8

North of SR-52

North of SR-56

South of SR-78

Ocean Distance 9.0 miles
Monthly Payment Calculator
Property Tax estimate of 1% of listing price does not include local voter-approved bonds/assessments, supplemental taxes for new construction or ownership changes, extra local fees, etc.
Listing Source
Platform CRMLS
AOR North San Diego County
MLS Number NDP2609182
Courtesy of
Listing Agent Gino Tinucci
ginosellsre@gmail.com
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