By Aidan Sowa · October 2026 · St Simons Island, GeorgiaA homeowner determines value on St Simons Island by answering two questions separately and then combining the answers honestly: what is the lot worth to a builder, and what, if anything, will a household buyer add for the house standing on it. The starting evidence is unusually clear in this market. A sample of 17 older homes in ZIP code 31522, built in 1980 or earlier, sold at an average of 23.1 percent of the price of new construction on a comparable lot, and builders acquired 9 of those 17 homes (Frontier Capitals, 2026). New construction on standard lots has sold from 1,100,000 dollars to 1,900,000 dollars (Redfin, 2026). Any valuation method that ignores that structure will produce a number the market will correct later, at the seller cost.
The method in this report has five steps an owner can complete without paying for an appraisal: gather the parcel record, read recent deeds split by build era, run the residual calculation from a finished home price, test the household premium honestly, and subtract the costs of the chosen selling route. Each step uses public or published evidence rather than opinion. Owners who also wonder about timing should read the assessment of the risks of waiting another year to sell alongside the valuation, because a value left untested for a year is a value exposed to insurance repricing and carrying costs throughout that year.
No single online figure can do this work. An estimate can start a conversation, but value on a barrier island turns on flood position, buildable footprint, tree canopy and frontage, none of which an island wide model weighs the way a buyer standing on the lot weighs them. The steps below replace the single figure with a defensible range, and a range an owner can explain is worth more in negotiation than a precise number nobody can support.
Key Findings
- Sampled older homes averaged 23.1 percent of comparable new build prices, and builders bought 52.9 percent of the sample (Frontier Capitals, 2026).
- New construction on standard lots has sold from 1,100,000 dollars to 1,900,000 dollars, setting the finished end of the calculation (Redfin, 2026).
- The research residual illustration leaves land value near 550,000 dollars to 650,000 dollars on a 1,500,000 dollar finished sale, before site preparation (Frontier Capitals, 2026).
- Flood zone designations and lot dimensions are recorded parcel by parcel and directly limit buildable area (Glynn County Board of Assessors, 2026).
- Automated estimates blend build eras and cannot substitute for deed evidence split between older and new homes (Zillow, 2026).
What documents should an owner gather first?
The parcel record comes first, because it defines the asset being valued. Parcel and permit records state lot dimensions, the recorded footprint and the permit history that any buyer will check (Glynn County Tax Assessor, 2026). The sample minimum lot was 6,098 square feet, but the surveyed area is only the beginning: flood zone designations and setbacks recorded against the parcel decide how much of that area can hold a new house (Glynn County Board of Assessors, 2026). An owner who knows the buildable envelope, rather than the headline lot size, already values more accurately than most listing descriptions do.
Flood and permit documents come next. Flood zone maps and permit records for the island show both the constraint and the history of what the county has allowed on the parcel (Glynn County, 2026). Building permit and tree protection requirements shape what a builder can plan around the live oak canopy, and a parcel with protected trees or a tight envelope supports a different finished home, and therefore a different land value, than a clear open lot of the same size (Glynn County Community Development, 2026). Insurance follows the same facts. Under current federal flood pricing methodology, elevation and flood position change the cost of insuring the property, and buyers price that annual cost into their offers (Federal Emergency Management Agency, 2026).
Finally, an owner should note the tax dimension of value before a sale is contemplated. For a long held primary residence, the gain calculation at sale interacts with the federal exclusion for sellers who meet the ownership and use tests, which allow up to 250,000 dollars of gain to be excluded, or 500,000 dollars on a joint return (Internal Revenue Service, 2026). Value determined today becomes the reference point for that later calculation, which is one more reason to build it from records rather than from a portal estimate.
How should recent sales be read?
Recent sales should be read as two separate records, never as one blended list. The first record is finished and new construction sales, which on standard lots run from 1,100,000 dollars to 1,900,000 dollars (Redfin, 2026). That record answers the question of what the lot could support. The second record is older home sales on comparable lots, which produced the 23.1 percent average in the sample (Frontier Capitals, 2026). That record answers the question of what buyers have actually paid for houses like the owner own house, on lots like the owner own lot. Blending the two records into a single average per square foot is the most common valuation error on the island, and it flatters older homes systematically.
Within the older home record, an owner should split sales again, between builder purchases and household purchases. Recorded deeds identify the buyer and the price that actually transferred, and they can be checked in county records (Glynn County Clerk of Superior Court, 2026). Builder purchases cluster around land value. Household purchases of genuinely livable homes can sit above that cluster. Knowing which cluster a house belongs to is the valuation. The geographic split matters too: values in the Village, the Beachfront Blocks, the Marsh-View Corridors and mid-island do not move as one, a point developed in the comparison of homes in north and south parts of the island, where location bands are weighed directly.
Automated estimates belong at the end of this step, as a check rather than a source. Published home value data is useful for spotting whether a deed based range is wildly out of line with modelled values (Zillow, 2026). Where the model sits far above the deed based range for an older home, the usual explanation is contamination from nearby new construction closings. The study of how accurate Zillow estimates are on the island examines that gap property type by property type, and owners who rely on an estimate alone should read it before they set a price.
How does the residual calculation turn a finished price into a lot value?
The residual calculation works backwards from a finished sale the lot could realistically support. Take the documented illustration. A new home sells for 1,500,000 dollars. Hard and soft construction costs take roughly 620,000 dollars. A builder margin near 20 percent compensates the capital and the risk of a long coastal build. What remains is a residual land value near 550,000 dollars to 650,000 dollars, before site preparation costs of 20,000 dollars to 35,000 dollars (Frontier Capitals, 2026). The illustration is simplified and the research labels it as such, but the direction of the arithmetic is how every serious builder bid on the island is built.
An owner running this calculation should use the finished price for the segment the lot actually sits in, not the island maximum. A mid-island interior lot supports a finished price nearer the lower part of the 1,100,000 dollar to 1,900,000 dollar corridor than a beachfront lot does (Redfin, 2026). The owner should then adjust for the parcel facts gathered in step one: a constrained envelope, difficult elevation work or heavy tree protection all reduce what the finished home can be, and therefore reduce the residual. Conversely, a clean, elevated, well proportioned lot in a premium segment can support a residual above the illustration range, and competition among builders is how that premium gets discovered.
The residual is a ceiling zone for a builder offer, not a promise. It tells an owner whether an offer is inside the defensible band or below it, and it explains why two builders can bid differently on the same house without either bid being dishonest: they may assume different finished prices, different construction costs or different margins. The test for whether a property is worth more as land applies this same calculation as a decision tool, comparing the residual against the best household outcome an owner could reasonably expect.
When does the house itself add value above the lot?
The house adds value when a household buyer can live in it without a programme of work, and the research defines that exception precisely. A genuinely livable, well kept home with updated systems and no functional obsolescence can capture a live-in buyer premium by being sold as a home rather than as a homesite. Updated systems are the test: roof, structure, plumbing, electrical and cooling that a buyer does not need to replace on arrival. An owner whose house passes that test should value the structure as a real addition to the lot value and should consider the listed route seriously.
Most older island homes do not pass the full test, and partial updates do not create partial premiums of the same size. The research renovation illustration spends 75,000 dollars on a 1968 cottage and finds a likely price lift of 50,000 dollars to 65,000 dollars for a live-in buyer, which is less than the spend, and no lift at all where the buyer acquires the lot (Frontier Capitals, 2026). The lesson for valuation is to credit existing condition honestly and to refuse to credit planned spending at more than the documented return. An owner valuing a house with an old roof and original systems should place it in the land value cluster and treat any household interest as upside, not as the base case.
A small number of properties beat their modelled values outright, usually because the lot is stronger than the model knows or because the house is more current than its build year suggests. The review of which island properties are most likely to sell above their current estimated value identifies those characteristics. For the typical 1950s to 1970s ranch or cottage, however, the disciplined answer remains: value the lot from the residual, value the structure only where its systems earn it, and let competing bids arbitrate the remainder.
What is the property worth after selling costs are counted?
Gross value and net value are different numbers, and an owner has only determined the first until selling costs are subtracted. The research ledger, worked on a 550,000 dollar sale, shows the scale. A conventional listing carries commission at 5 to 6 percent and seller closing costs at 1 to 2 percent, together 33,000 dollars to 44,000 dollars, plus repair credits that routinely run 10,000 dollars to 25,000 dollars and carrying costs of 15,000 dollars to 35,000 dollars over three to six months on market. A listed older home commonly takes 60 to 120-plus days, which is what makes the carrying line real. The worksheet for calculating net proceeds from a sale lets an owner run those lines against any gross figure.
A direct sale removes several of those lines, and the five benefits define the alternative clearly. Privacy: zero showings, zero open houses, no public marketing period and no public record until the deed transfers, valuable on an island where a sale is quickly public knowledge. Flexible closing: 7 to 21 days when speed matters, or months out with a leaseback, instead of the long listed timeline. No commissions: the 5 to 6 percent charge, 27,500 dollars to 33,000 dollars on the 550,000 dollar example, is not paid. No seller closing costs: the further 1 to 2 percent is removed as well, for a combined saving of 33,000 dollars to 44,000 dollars on that example. No inspections or repairs: the as-is sale carries no repair credits, because a buyer purchasing for the land performs no structural inspection.
Frontier Capitals buys directly from sellers and sources off-market deals to builders as a wholesaler, without presenting itself as a builder. An owner testing a direct offer should apply the same documentary discipline used for valuation: proof of funds in the buyer name dated within the last 30 days, and recorded deeds in the buying entity name from closed purchases, checkable in county records (Glynn County Clerk of Superior Court, 2026). Value determined by method can then be compared across routes on a net basis, which is the only comparison that respects the evidence gathered in the earlier steps.
Methodology and limitations
The method in this report rests on the sample of 17 older homes in 31522, 9 acquired by builders, compiled for this research (Frontier Capitals, 2026). The 23.1 percent average and the residual illustration are sample based tools, not appraisals, and the illustration is simplified by design. Finished price corridors come from recent sold and new construction records (Redfin, 2026), and modelled value behaviour from published home value data (Zillow, 2026). Parcel, flood and permit facts are drawn from county sources as cited (Glynn County Tax Assessor, 2026; Glynn County Board of Assessors, 2026; Glynn County, 2026; Glynn County Community Development, 2026).
No property was inspected for this report and no individual valuation is offered in it. Flood pricing effects are described through federal methodology rather than through quotes for specific addresses (Federal Emergency Management Agency, 2026). Tax references describe the federal exclusion framework only (Internal Revenue Service, 2026) and are not tax advice. Owners who need a certified value for lending, estate or legal purposes should obtain a formal appraisal in addition to the market method described here.
Conclusion
A St Simons Island homeowner determines value by splitting the property into its two real components: a lot valued backwards from finished prices of 1,100,000 dollars to 1,900,000 dollars through the residual calculation, and a structure valued only where updated systems and genuine livability earn a household premium (Frontier Capitals, 2026; Redfin, 2026). Deeds, parcel records and flood documents supply the evidence, automated estimates supply at most a check, and selling costs convert the gross answer into the net figure that should drive the decision. Owners who follow that order rarely overprice, rarely undersell, and can explain their number to any buyer who challenges it.
Owners who want the method applied to a specific island property can telephone Frontier Capitals at 401-219-4207 or email [email protected].
If you valued your lot and your house separately tomorrow morning, which of the two numbers would surprise you more?
Frequently Asked Questions
What is the fastest reliable way to get a first value range?
Run the residual from the finished price your segment supports, then check the result against recent older home deeds. The sample average of 23.1 percent of a comparable new build price gives a quick cross-check (Frontier Capitals, 2026). An owner whose two methods land near each other has a defensible starting range.
Should an owner trust the county assessment as the value?
No. Parcel records are essential for dimensions, flood designations and permit history (Glynn County Board of Assessors, 2026; Glynn County Tax Assessor, 2026), but an assessed figure is produced for tax administration, not for a sale. Buyers price from deeds and residuals, and an owner should do the same.
How much does flood position change the answer?
Flood position changes both the buildable envelope and the insurance cost a buyer inherits, and insurance is priced under federal Risk Rating 2.0 methodology (Federal Emergency Management Agency, 2026). Two similar cottages at different elevations can support materially different values for that reason alone. Elevation documentation should be part of any valuation file.
Can planned renovations be counted in the value today?
Only at their documented return, not at their cost. The research illustration found a 75,000 dollar update lifting price by 50,000 dollars to 65,000 dollars for a live-in buyer and by nothing for a lot buyer (Frontier Capitals, 2026). Counting unspent renovation money at full cost overstates value in almost every case.
When is a formal appraisal still necessary?
An appraisal is necessary where a lender, court or tax filing requires a certified opinion, and it is wise for estate matters. The federal exclusion framework also makes the gain calculation at sale worth professional advice for long held homes (Internal Revenue Service, 2026). The market method in this report complements an appraisal; it does not replace one where the law or a lender requires it.
Sellers in St Simons Island also ask Is Selling a St Simons Island Home in 2026 Better Than Waiting Until 2027?
Sources
- Frontier Capitals, 2026. 189 neighborhood builder acquisition sample: 17 homes sampled in 31522, 9 acquired by builders, average older home price 23.1 percent of new build. Market data.
- Redfin, 2026. Recently sold homes and new construction, ZIP code 31522, St. Simons Island GA. Market data.
- Zillow, 2026. Home values and recently sold, 31522. Market data.
- Glynn County Board of Assessors, 2026. Parcel records, flood zone designations, and lot dimensions for St Simons Island. Official record.
- Glynn County Tax Assessor, 2026. Parcel and permit records, St. Simons Island GA. Official record.
- Glynn County Clerk of Superior Court, 2026. Recorded deeds and plat records for 31522. Official record.
- Glynn County Community Development, 2026. Building permit and tree protection requirements for St Simons Island. Official record.
- Glynn County, 2026. Flood zone maps and permit records for St Simons Island. Official record.
- Federal Emergency Management Agency, 2026. National Flood Insurance Program: Risk Rating 2.0 methodology and elevation certificate requirements. Government data.
- Internal Revenue Service, 2026. Publication 523: Selling Your Home, Section 121 exclusion rules. Government data.