142 144 6th ST, Seal Beach, CA 90740 (MLS # NP26126800)

Price $3,095,000
Status Active
Beds 4
Baths 4.5 Baths
Home size 3,607 sqft
Lot Size 5,877 sqft
Days on Market 2
An extraordinary opportunity to own a rare double-lot duplex in one of Southern California's most sought-after coastal communities. Opportunities like this seldom become available in the heart of coveted Old Town Seal Beach's prestigious Gold Coast neighborhood. Whether you're looking to build your dream home, complete a 1031 exchange, live in one unit while generating rental income from the other, or capitalize on a unique investment or development opportunity, this property offers exceptional flexibility in one of California's most beloved beach towns. Located just one block from the sand and ocean, this exceptional double lot presents endless possibilities for homeowners, investors, and developers alike. Potential opportunities include dividing the property into two separate lots and constructing new homes with ADUs, retaining one existing structure while developing the second lot, or preserving the charming one-bedroom beach cottage and adding an ADU above the garage (all subject to City approval). The property features two original beach cottages connected by a shared courtyard. Unit 144 is a spacious 3,047-square-foot residence (per appraisal) offering 3 bedrooms and 3 bathrooms. The main level features a generous family room, kitchen, dining area, living room, bedroom, a full bathroom and a half bathroom . Upstairs, you'll find a large den, an expansive primary suite with a walk-in closet and en-suite bathroom, as well as a secondary bedroom and an additional full bathroom. A spiral staircase leads to the rooftop deck, where breathtaking 360-degree views of the coastal town, city lights, and surrounding mountains create an unforgettable setting. Unit 142 is a charming 1-bedroom, 1-bathroom beach cottage complete with a living room, kitchen, and private outdoor yard. Each residence includes its own spacious two-car garage with access from a wide alley"”an uncommon and highly desirable feature in Old Town. This is a standout opportunity for owner-users, investors, and developers seeking a premier coastal property with exceptional versatility and long-term potential. Just moments from the beach, the boutique shops and restaurants of Main Street, and highly rated school district, this rare double-lot property offers the very best of Seal Beach coastal living.
Property Type(s): Single Family
Last Updated 6/16/2026 Tract Old Town (OLDT)
Year Built 1938 Community 1A - Seal Beach
Garage Spaces 4.0 County Orange

SCHOOLS

Elementary School McGaugh
High School Los Alamitos

Additional Details

AIR Central Air
AIR CONDITIONING Yes
APPLIANCES Dishwasher, Microwave
AREA 1A - Seal Beach
FIREPLACE Yes
GARAGE Attached Garage, Yes
HEAT Central
INTERIOR Ceiling Fan(s), Central Vacuum, Track Lighting
LOT 5876 sq ft
LOT DIMENSIONS 5876
PARKING Attached, Garage
POOL DESCRIPTION None
SEWER Public Sewer
STORIES 3+
STYLE Cottage, Mediterranean, PatioHome, Spanish
SUBDIVISION Old Town (OLDT)
VIEW Yes
VIEW DESCRIPTION City Lights, Mountain(s), Neighborhood, Panoramic
WATER Public

Location

 

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Listed with Pacific Sotheby's Int'l Realty

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Based on information from California Regional Multiple Listing Service, Inc. as of 6/17/26 5:25 AM PDT and /or other sources. All data, including all measurements and calculations of area, is obtained from various sources and has not been, and will not be, verified by broker or MLS. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information

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