Spacious Custom 3BR/3.5BA Coastal Home with Private Preserve Views | 5900 Costanero | St. Augustine, FL

Tucked against a protected state property preserve, 5900 Costanero in St. Augustine, Florida is a rare custom-built residence offering 2,833 square feet of thoughtfully designed living space — combining elevated construction standards, luxury finishes, and a setting that quietly borders unspoiled nature. Every bedroom is fully ensuite with a walk-in shower, the kitchen is outfitted with professional-grade appliances, and three private decks extend the living space outdoors toward trees, birds, and coastal air. Whether you're an outdoor lifestyle buyer, a discerning move-up buyer, or someone searching for a low-maintenance coastal retreat with serious structural bones, this home delivers on every level.

Listed by the Kim Devlin Team with Your Key to St. Augustine @ FIV Realty.

Key Property Features

• Square Footage: 2,833 sq ft of well-appointed living space across two floors
• Bedrooms & Bathrooms: 3 bedrooms, all fully ensuite with walk-in showers + 1 half bath
• Primary Suite: A true retreat — featuring a walk-in shower with center bench seating, a separate soaking tub, a private sauna, and a spacious walk-in closet
• Ensuite Bedrooms 2 & 3: Each with private walk-in showers and walk-in closets — ideal for guests, multigenerational living, or a home office suite
• Kitchen: Quartzite countertops, white soft-close wood cabinetry, walk-in pantry, 5-burner propane gas range, convection oven, Bosch and Whirlpool appliances, microwave
• Flooring: 30-inch tile on the main level; 5/8" engineered hardwood on the second floor — warm, durable, and refined
• Living Areas: Open and bright dining/living layout flooded with natural light
• Laundry Room: Large dedicated laundry room with sink and cabinetry, overlooking the preserve
• Construction Quality: Concrete block construction (10 ft), 2x6 framing on second floor, 5/8" laminated wood sheathing, wet mat — built for durability and storm resilience
• Roof: Metal roof — long-lasting and low maintenance
• Windows & Doors: Hurricane impact windows and doors throughout
• HVAC: Dual HVAC systems for zoned comfort and redundancy
• Water Heater: Circulating water heater for instant hot water delivery
• Smart Home Features: Remote-controlled/smart blinds
• Coat Closet / Future Elevator Shaft: The coat closet is pre-positioned and can be converted into a residential elevator shaft — a thoughtful future-proofing detail
• Under-Stair Storage: Built-in storage maximizes every square foot
• Garage & Parking: RV parking with dedicated RV power hookup; low-maintenance yard
• Outdoor Living: Three decks, outdoor shower, storage shed, and direct views of the state preserve and bird aviary
• Insurance: Home and flood insurance package approximately $5,000/year; flood insurance is transferable to the buyer
• Utilities: Currently on septic (plastic tank/leach field in front yard); sewer is available at the street — a future buyer can connect at their option

Location & Community Benefits – St. Augustine, FL

5900 Costanero is positioned in one of St. Augustine's most nature-connected residential settings, with direct adjacency to state-protected preserve land and a bird aviary — offering a permanent buffer of privacy and wildlife that no future development can eliminate.

• Beach Access: A short walk to beach parking and a dedicated beach walkover — one of the most coveted conveniences in coastal St. Augustine
• Outdoor Recreation: Trails, parks, and the natural coastal environment are right outside your door
• Commuter Access: Convenient access to US-1, I-95, and FL-A1A connecting St. Augustine to Jacksonville, Palm Coast, and Daytona Beach
• Shopping & Dining: Minutes from the boutiques, restaurants, and cultural attractions of Historic Downtown St. Augustine
• Schools: Served by St. Johns County School District, consistently ranked among Florida's top school systems
• Lifestyle: This location is ideally suited for buyers who want the Florida coastal lifestyle without the density — nature, privacy, and beach access in one address

Frequently Asked Questions

What makes 5900 Costanero stand out among St. Augustine homes for sale?

This property combines high-spec custom construction — concrete block, 2x6 framing, metal roof, hurricane impact windows — with luxury interior finishes including quartzite countertops, tile flooring, engineered hardwood, and a primary suite with a soaking tub and private sauna. The lot adjoins a state preserve and bird aviary, providing permanent privacy and natural beauty. With three decks, RV parking, beach walkover access nearby, and transferable flood insurance, this is an exceptionally complete package.

What are the key renovation and construction details at 5900 Costanero?

The home features solid concrete block construction with 10-foot block, 2x6 framing on the second floor, and 5/8" laminated wood sheathing. Interior upgrades include quartzite kitchen countertops, Bosch and Whirlpool appliances with a 5-burner propane gas range, soft-close white wood cabinetry, a walk-in pantry, tile flooring on the main level, engineered hardwood on the second floor, dual HVAC systems, a circulating water heater, hurricane impact windows and doors, a metal roof, and smart/remote-controlled blinds. The primary suite includes a sauna, soaking tub, and walk-in shower with bench.

What recreational amenities are near 5900 Costanero in St. Augustine?

Residents enjoy a short walk to beach parking and a beach walkover providing direct access to St. Augustine's coastline. The property directly abuts state preserve land and a bird aviary. The broader area offers trails, parks, water access, and all the cultural and dining amenities of Historic Downtown St. Augustine.

What is the septic and sewer situation at this property?

The home currently operates on a private septic system (plastic tank with a leach field located in the front yard). Municipal sewer service is available at the street, and a future buyer may connect at their discretion — providing flexibility for long-term utility planning.

Who is representing the listing at 5900 Costanero, St. Augustine?

This home is listed by the Kim Devlin Team with Your Key to St. Augustine @ FIV Realty, specializing in residential real estate throughout St. Augustine, Palm Coast, and St. Johns County, Florida.

Schedule a Showing

If 5900 Costanero sounds like the coastal lifestyle you've been looking for, connect with the Kim Devlin Team to schedule a private showing or get more details. Homes with this construction quality, setting, and location don't stay available — reach out today!