Marco Island • 730 S Collier Boulevard • South Beach • Gulf-Front Condominiums
Sandcastle I Marco Island Condos for Sale
Sandcastle I is a direct Gulf-front condominium at 730 S Collier Boulevard on the desirable southern portion of Marco Island's Crescent Beach. Completed in 1982, the 16-story building contains approximately 94 residences and offers one- and two-bedroom condominiums together with selected larger and penthouse configurations.
Sandcastle I combines private beach access, broad Gulf and sunset views, a large community pool and spa, tennis, pickleball, fitness facilities, social spaces and assigned covered or under-building parking. Its South Beach location also places residents near dining, shopping and entertainment along South Collier Boulevard.
Residence size and orientation vary within the building. Current and historical property records demonstrate compact one-bedroom residences around 863 air-conditioned square feet, two-bedroom homes around 1,020 air-conditioned square feet, and larger upper-floor or penthouse configurations extending beyond 1,200 square feet.
730 S Collier Boulevard Built 1982 94 Residences 16 Stories Direct Gulf Frontage 1 & 2 Bedroom Condos Penthouse Residences Pool & Spa Fitness Center Tennis & Pickleball Covered Parking 30-Day Rental Minimum
Sandcastle I at 730 S Collier Boulevard
Sandcastle I stands directly on Marco Island's Gulf beach near the southern end of the island. Residents can move from the condominium grounds toward the sand and Gulf without crossing South Collier Boulevard.
The building's western orientation creates a strong relationship with Marco Island's white-sand shoreline, Gulf sunsets and the long arc of Crescent Beach.
Across and nearby along South Collier Boulevard, residents have access to restaurants, shops and entertainment, making Sandcastle I a practical choice for buyers who want direct beachfront living with convenient access to everyday island destinations.
Sandcastle I Residence Types
Sandcastle I should not be evaluated as though every condominium has the same floor plan or square footage.
One-Bedroom Residences Current property records include one-bedroom residences of approximately 863 air-conditioned square feet, often with one-and-one-half baths and substantial Gulf-facing outdoor space.
Two-Bedroom Residences Two-bedroom configurations include residences around 1,020 air-conditioned square feet, with approximately 1,148 square feet of published total building area in selected plans.
Larger Residences Selected unit positions provide larger living areas and different balcony arrangements, requiring same-stack comparisons whenever possible.
Penthouse Residences Upper-level and penthouse homes form a separate category, with public records showing examples above 1,200 square feet and distinct view characteristics.
One-Bedroom Sandcastle I Condos
One-bedroom Sandcastle I residences provide a comparatively efficient way to own directly on Marco Island's beach.
Current MLS and property records identify approximately 863 square feet of air-conditioned living area for this residence category, commonly with one full bath and an additional half bath.
Despite their smaller interior footprint, these homes can include large balconies or lanais, in-residence laundry, storage and direct Gulf or beach views depending on position.
Buyers should compare view exposure and balcony utility carefully because those permanent features can create meaningful value differences between otherwise similar one-bedroom residences.
Two-Bedroom Sandcastle I Condos
Two-bedroom Sandcastle I residences provide more separation for owners and guests and represent another important segment of the building's market.
Current records include two-bedroom, two-bath homes around 1,020 air-conditioned square feet with approximately 1,148 square feet of total building area.
Selected two-bedroom residences feature split-bedroom layouts, walk-in closets, in-residence laundry and large Gulf-facing balconies.
Residence position matters significantly. South-side and Gulf-facing units may emphasize long beach views, southwest light and sunset exposure, while other positions can create different combinations of Gulf, pool and island views.
Sandcastle I Penthouse & Upper-Floor Condos
Upper Sandcastle I residences can create a substantially different experience from lower-floor homes because elevation changes both the Gulf horizon and the relationship with Crescent Beach.
Public property records include penthouse examples of approximately 1,228 square feet, while other upper-level records demonstrate configurations approaching approximately 1,565 square feet.
Because these larger or unusual residences do not necessarily match the standard lower-floor plans, buyers and sellers should avoid applying ordinary building averages without first identifying the exact unit configuration.
Direct Marco Island Beach Access
Sandcastle I is a true beachfront condominium.
The building fronts Marco Island's Gulf shoreline and provides residents with access from the property toward the beach.
That permanent Gulf-front position is one of Sandcastle I's most important characteristics and should be treated separately from interior renovation when comparing value.
Gulf, Beach & Sunset Views
Sandcastle I residences can capture direct Gulf views, long Crescent Beach perspectives and western sunset exposure.
The exact outlook depends on floor height and unit position. Some residences emphasize open water, while others combine Gulf, beach, pool and island views.
Higher floors generally expand the horizon, while lower floors can create a closer visual relationship with the beach, pool and landscaped grounds.
View-comparison principle: compare the actual Gulf and beach view from the living room, primary bedroom and main balcony of the exact residence rather than relying on floor number alone.
Balconies & Outdoor Living
Private balconies and lanais are important components of Sandcastle I ownership.
Selected residences provide substantial outdoor space overlooking the Gulf and Marco Island's beach, allowing owners to extend the living area outdoors for dining, reading and sunset viewing.
Buyers should compare balcony depth, width, exposure, privacy, railings, waterproofing, sliding doors and hurricane protection for the specific residence.
Sandcastle I Pool & Spa
Sandcastle I provides a large community swimming pool and spa within its beachfront grounds.
The pool offers an alternative to Gulf swimming while keeping residents within the coastal recreation environment.
Nearby barbecue and picnic facilities create additional space for casual outdoor dining and entertaining.
Fitness Center & Sauna
The building includes an exercise or fitness room for residents.
Current and historical property information also identifies sauna facilities within the community amenity package.
These facilities complement beach walking, swimming and racquet sports without requiring residents to leave the condominium property.
Tennis & Pickleball
Sandcastle I provides both tennis and pickleball opportunities.
Current MLS records identify tennis and pickleball among the association amenities, together with the pool, spa and exercise room.
Buyers who consider racquet sports important should confirm current court configuration, scheduling procedures and guest-use rules.
Social Room & Resident Spaces
Sandcastle I includes a community or social room for resident gatherings and permitted private functions.
Current property descriptions also identify library or computer space, outdoor gathering areas and other common facilities within the building.
Assigned Parking
Individual Sandcastle I residences are associated with assigned parking, with current records showing covered, carport or under-building arrangements depending on the unit and data source.
The exact parking right should therefore be confirmed through condominium records and title information rather than assumed from another residence in the building.
Parking due diligence: verify the exact assigned space, coverage, location, vehicle restrictions and relationship to the building entrance before purchasing.
Private Storage & Bicycle Storage
Current Sandcastle I records identify private assigned storage, bicycle storage and related common storage facilities.
These spaces can be particularly useful for beach equipment, luggage, bicycles and seasonal belongings.
Buyers should verify the exact storage space associated with the residence and confirm its location and dimensions.
Security & On-Site Management
Sandcastle I incorporates controlled building access and professional on-site management.
Current property information identifies features such as fob entry, secured lobby or garage access, elevators and resident-management services.
Security and access procedures can change, so buyers should review current rules concerning guests, contractors, deliveries and parking.
Impact Glass & Hurricane Protection
Storm protection varies by individual Sandcastle I residence.
Current listings include examples with impact-resistant windows and sliders, hurricane shutters or combinations of the two.
A buyer should verify every exterior opening rather than assuming the entire residence has the same type of protection.
Renovated vs. More Original Sandcastle I Condos
Sandcastle I was completed in 1982, and individual residences have been renovated to significantly different standards.
Current and recent sales include remodeled kitchens, updated bathrooms, replacement flooring, impact-resistant glazing, custom closets and newer mechanical equipment.
Other residences may retain more of an earlier configuration, giving buyers an opportunity to renovate around the permanent floor plan, Gulf view, balcony and floor height.
Kitchen Review cabinetry, countertops, appliances, plumbing, electrical work and changes to the original layout.
Bathrooms Compare plumbing, waterproofing, fixtures and renovation quality.
Impact Protection Verify windows, sliders, exterior doors and any remaining shutter systems.
HVAC & Water Heater Confirm equipment age, maintenance history and anticipated replacement needs.
Flooring Review material, condition and applicable association sound-control requirements.
Permits & Approval Material alterations should be reviewed for required permits and association approval.
Sandcastle I Rental Rules
Current MLS records report a 30-day minimum lease period with as many as 12 leases per year.
That structure provides substantially more rental flexibility than Marco Island buildings requiring three-month, six-month or annual leases while remaining different from the island's weekly-rental condominiums.
Current published leasing guidance: 30-day minimum with up to 12 leases per year. Buyers should verify the current condominium declaration, lease application, approval process and any seasonal restrictions before purchasing for rental use.
Sandcastle I Pet Policy
Current Sandcastle I property records are not completely consistent regarding ordinary household pets.
Several current and recent MLS-derived records report no pets. Another current data feed displays "with approval" while its accompanying restriction refers to service and emotional-support documentation.
Because that distinction is important, buyers should obtain the current written Sandcastle I pet provisions directly from the association before purchasing with an animal.
Sandcastle I Condominium Association
The legal association is The Sandcastle I Condominium Association, Inc., with its principal address at 730 S Collier Boulevard.
Florida corporate records show that the association was established in 1980 and remains active.
A purchase should include evaluation of the financial and physical condition of the association in addition to the private residence.
Operating Budget Review recurring building expenses and services included through current condominium assessments.
Reserve Funding Compare current reserve balances with anticipated repair and replacement requirements.
Master Insurance Review property and wind insurance together with major deductibles and exclusions.
Special Assessments Identify approved, pending, recently completed and reasonably anticipated assessments.
Structural Documentation Review applicable milestone inspection, engineering and Structural Integrity Reserve Study information.
Capital Projects Understand exterior, balconies, elevators, pool, parking, waterproofing, roof and mechanical projects.
Flood, Wind & Sandcastle I Condo Insurance
Sandcastle I's direct Gulf-front setting makes condominium insurance an important part of buyer due diligence.
Buyers should understand the relationship between the association's master policy and individual HO-6 coverage, including wind deductibles, loss-assessment protection and responsibility for interior improvements.
Owners should also determine responsibility for windows, sliding doors, shutters and other exterior components applicable to their specific residence.
What Sandcastle I Buyers Should Compare
Residence Type Identify one-bedroom, two-bedroom, larger or penthouse configuration before choosing comparables.
Living Area Published residence sizes vary materially within the building.
Floor Height Elevation influences Gulf horizon, beach perspective and privacy.
Unit Position Building position affects southwest exposure, natural light and shoreline views.
Gulf View Compare actual open-water and beach views from primary living areas.
Balcony Evaluate size, orientation, usable depth and hurricane protection.
Parking Verify the exact assigned space and whether it is covered, carport or under-building.
Storage Confirm the private storage area associated with the residence.
Impact Protection Verify windows, sliders, exterior doors and shutters individually.
Renovation Separate decorative finishes from plumbing, electrical and mechanical improvements.
Association Financials Review budget, reserves, insurance, assessments and capital planning.
Structural Review Obtain applicable engineering, milestone-inspection and reserve-study documentation.
Rental Rules Current records report a 30-day minimum and up to 12 leases per year.
Pet Rules Obtain current written association confirmation because public data sources are inconsistent.
How to Value a Sandcastle I Condo
Sandcastle I should be valued through relevant same-building comparisons before expanding to other Marco Island beachfront condominiums.
An 863-square-foot one-bedroom residence does not compete directly with a two-bedroom condominium around 1,020 square feet or with a larger upper-floor residence.
After identifying the correct residence category, buyers and sellers should compare floor level, unit position, Gulf exposure, balcony, parking, storage, impact protection and renovation.
Sandcastle I valuation sequence: residence type → living area → unit position → floor height → Gulf and beach view → balcony → parking & storage → impact protection → renovation → association condition.
Sandcastle I Marco Island Condos for Sale
The MLS identifies the building as Sandcastle I and the subdivision as Sandcastle I, The A Condo.
Recent 2026 market activity has included both one-bedroom and two-bedroom residences within the building, demonstrating the importance of separating the different floor-plan categories when evaluating current inventory.
Use the dedicated Sandcastle I search below to view available inventory and the Marco Island waterfront condo market report for broader Gulf-front market context.
Sandcastle I Condos For Sale • Sandcastle I Map Search • Marco Island Waterfront Condo Market Report
Compare Marco Island Beachfront Condos
Explore established Marco Island beachfront condominium buildings and compare residence size, Gulf views, floor plans, balconies, parking, amenities, rental provisions and association characteristics.
Sandcastle I vs. Sandcastle II
Sandcastle I and Sandcastle II are neighboring beachfront condominium buildings but are separate condominium associations with different legal identities and street addresses.
Sandcastle I is located at 730 S Collier Boulevard, while Sandcastle II is located immediately nearby at 720 S Collier Boulevard.
Buyers should therefore keep sales, association financials, reserves, insurance, assessments, rental policies, pet provisions and building projects separated when comparing the two properties.
Selling a Sandcastle I Condo
Sandcastle I sellers should first identify the correct residence category and then compare recent same-building sales with similar living area, position and floor height.
Gulf view, balcony exposure, parking, storage, hurricane protection and renovation quality can then be used to distinguish the property from otherwise relevant comparable sales.
Separating Sandcastle I from Sandcastle II transactions is also important because they are distinct associations and should not be treated as one interchangeable condominium building.
Explore Sandcastle I With Schulz Realty
Schulz Realty can help buyers compare Sandcastle I residences by living area, residence type, floor height, Gulf and beach view, balcony, parking, storage, renovation, hurricane protection, rental provisions, association financials and relevant same-building sales before arranging private tours.
Contact Schulz Realty for Sandcastle I Listings & Private Tours
Call David Schulz at (239) 682-5800.
Sandcastle I residence sizes, floor plans, views, balcony configurations, parking and storage rights, association fees, reserve funding, insurance coverage, deductibles, assessments, structural and capital projects, amenities, rental provisions, pet policies and individual residence features may vary or change. Buyers should verify material information through current Sandcastle I condominium documents, association financial statements, applicable structural and reserve reports, insurance information, inspections, public records, title work and appropriate qualified professionals before purchasing.
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The data relating to real estate for sale on this web site comes in part from the Broker Reciprocity Program (BR Program) of M.L.S. of Naples, Inc. Properties listed with brokerage firms other than this company are marked with the BR Program Icon or the BR House Icon and detailed information about them includes the name of the listing brokers. The properties displayed may not be all the properties available through the BR Program. The information provided is for consumers’ personal, non-commercial use and may not be used for any other purpose.