This page is no longer updated; I'd be willing to help someone update and maintain such information.
Detailed sales reports since 2009 are provided in PDF format for viewing or download.
The reports are based on county data, which typically differs from that of MLS because not all sales are reported through the Hilton Head Island MLS. Beaufort MLS also serves Callawassie Island. Also, For Sale By Owner, tax sales, foreclosures, etc. are not typically included in MLS. Historically, developer sales were not typically included.
The way the county generates reports causes problems if a property changes hands several times during the year. Individual property records were used to correct such occurrences, but this is a tedious process prone to oversights and minor errors.
County data is the ultimate source, since theirs is the basis of tax records. While the Industry has access to Realist Tax info, they use MLS data to generate their sales reports, because these sales are the ones that generate real estate commissions.
As a by-product of capturing all "Sales" the county includes any property transfer, even if we would not consider it a sale. Examples include putting your property in the name of a trust, changing the owner from one spouse to another, or a bank taking ownership by foreclosure.
The following reports categorize transfers into the following:
Market Sales - MLS and FSBO sales to 3rd parties, which requires CIPOA to issue a waiver to their right of first refusal to buy the property.
Property Transfers - Totally new owners which trigger a need for a CIMC Membership. This would include foreclosures, tax sales, private sales, etc. Foreclosures generally result in a Market Sale shortly thereafter.
Estate Transfers - for which the actual owner doesn't change, and whatever membership requirement is in force, remains. This can be an individual placing a property into a trust or LLC, or a transfer to a family member, or changing of the type of ownership.