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Sullivans Island Mother In Law Suites

Here are all of the homes on Sullivans Island with a mother in law suite. 

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20 Photos 409 Station 22 1/2 Street Sullivans Island, SC 29482

409 Station 22 1/2 Street
Sullivans Island, SC 29482
Residential

MLS# 25023882 / Active
2 br, 1 ba, 1000 Sqft

A Rare Sullivan's Island Offering -- charming coastal cottage offered at a fraction of typical island prices. Just a short stroll to the beach and ... 

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$1,799,000
Reduced -$26,000
Provided courtesy of Carroll Realty
30 Photos 3115 Ion Avenue UNIT A Sullivans Island, SC 29482

3115 Ion Avenue UNIT A
Sullivans Island, SC 29482
Sullivans Island
Residential

MLS# 24019953 / Active
5 br, 6 ba, 4502 Sqft

New co-ownership opportunity by Pacaso: Own one-eighth of Coastal Treehouse, a professionally managed, turnkey home. Learn more about our limited-t... 

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$899,000
Provided courtesy of Pacaso Inc.
30 Photos 3115 Ion Avenue UNIT B Sullivans Island, SC 29482

3115 Ion Avenue UNIT B
Sullivans Island, SC 29482
Sullivans Island
Residential

MLS# 23010360 / Active
5 br, 6 ba, 4502 Sqft

New co-ownership opportunity by Pacaso: Own one-eighth of Coastal Treehouse, a professionally managed, turnkey home. Learn more about our limited-t... 

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$899,000
Reduced -$27,000
Provided courtesy of Pacaso Inc.
30 Photos 3115 Ion Avenue UNIT C Sullivans Island, SC 29482

3115 Ion Avenue UNIT C
Sullivans Island, SC 29482
Sullivans Island
Residential

MLS# 23010359 / Active
5 br, 6 ba, 4502 Sqft

New co-ownership opportunity by Pacaso: Own one-eighth of Coastal Treehouse, a professionally managed, turnkey home. Learn more about our limited-t... 

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$899,000
Reduced -$27,000
Provided courtesy of Pacaso Inc.
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Broker Reciprocity The data relating to real estate for sale on this web site comes in part from the Broker ReciprocitySM Program of the Charleston Trident Multiple Listing Service. Real estate listings held by brokerage firms other than EXP Realty LLC are marked with the Broker ReciprocitySM logo or the Broker ReciprocitySM thumbnail logo (a little black house) and detailed information about them includes the name of the listing brokers. Last updated on 06-09-2026 11:02 AM EST . The broker providing these data believes them to be correct, but advises interested parties to confirm them before relying on them in a purchase decision. Copyright 2026 Charleston Trident Multiple Listing Service, Inc. All rights reserved.
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