A rolling ninety day window: June 1 through August 31, 2026. Inventory current as of September 18, 2026.
Lake San Marcos is a lakeside community on the west side of San Marcos in the 92078 ZIP code. Close to half of what sells there is attached, and about a fifth of the closings over the past year were in its 55 and over sections, so the mix of what happens to close moves the median more than it would in a tract of similar houses.
How this is measured, before the numbers
These figures cover the three complete months from June 1 through August 31, 2026 rather than August on its own, and they are compared with the identical three months a year earlier. A single month in a market this size swings on a handful of closings, which makes it a poor guide to where prices actually are. The median is taken from the whole pool of 35 sales in the window, not averaged from three monthly medians. Of those 35 sales, 11 closed in August 2026.
June 1 through August 31, 2026 in numbers
All figures from the September 18, 2026 pull. Sales and inventory come from the same pull.
| Measure | June 1 through August 31, 2026 | June 1 through August 31, 2025 |
|---|---|---|
| Homes sold | 35 | 27 |
| Median price | $830,000 | $1,105,000 |
| Median price per square foot | $607 | $632 |
| Median days on market | 16 | 12 |
| Sale to list price | 97.9% | 100.0% |
| Percent of original asking price | 96.8% | 99.6% |
| Closed at or above asking | 40.0% | 55.6% |
| Took a price reduction | 42.9% | 14.8% |
The median across the window was $830,000, down 24.9 percent against the same three months a year earlier. Price per square foot was $607, down 4.0 percent. The two measures disagree, so the mix of homes that sold changed. Attached homes were 43 percent of the window's closings against 30 percent a year earlier, on a median 1,456 square feet against 1,700. Read the price per square foot as the measure of value and the median as a description of what happened to close.
Homes took a median 16 days on market across the window, against 12 days in the same three months a year earlier. Sellers collected a median 97.9 percent of their final asking price and 96.8 percent of their original.
Over the full twelve months through August 2026, the median across 149 sales was $927,000, down 4.7 percent against the twelve months before it. The ninety day window shows where the market has been lately; the twelve month figure shows the longer trend.
Inventory as of September 18, 2026
There were 11 homes for sale and 7 in escrow. Against a closing pace of 12.4 sales a month over the previous twelve months, that is 0.9 months of supply. That is well under the six months usually called balanced. Inventory is a point in time rather than a window, so this snapshot is dated and belongs to this post only.
What the numbers say
There is very little standing inventory, 0.9 months of supply, and yet 42.9 percent of the window's closings had taken a reduction first and sellers collected a median 96.8 percent of their original asking price. Thin supply is not protecting an opening price set above the comparable sales.
The national rate backdrop
Nationally, the Freddie Mac thirty year fixed average barely moved through August, reading 6.69 percent on the sixth, 6.67 on the thirteenth, 6.65 on the twentieth and 6.66 on the twenty seventh. That is a four basis point range across the whole month. It is national context and not a reading of this market, and nothing above should be attributed to it.
Where to look next
Neighborhood pages for this market: Lake San Marcos, San Marcos real estate, San Elijo Hills.
The wider market, last month: What Sold in San Marcos, July 2026.
Same month, other markets: Ocean Hills Country Club.
How these figures are put together
Every figure above is calculated from closed residential sales reported to the multiple listing service in Lake San Marcos, from the pull dated September 18, 2026. The window is the three complete calendar months from June 1 through August 31, 2026, compared with June 1 through August 31, 2025. Medians are pooled from the individual sales in the window rather than averaged from monthly figures, because an average of medians is not a median and one unusual sale moves an average. Where the same home closed twice on two listings, it is counted once. Sale to list price is against the final asking price; percent of original asking price is shown separately. Active listings, pending sales and months of supply are a snapshot from the same pull and are dated above.
These are recently closed sales in the area and are not represented as transactions of The Lund Team. This is not an appraisal, a valuation, or financial advice.
Based on information from California Regional Multiple Listing Service, Inc. as of September 18, 2026 and/or other sources. All data, including all measurements and calculations of area, is obtained from various sources and has not been, and will not be, verified by broker of MLS. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information.
Tyson Lund · Broker · DRE #01385039
The Lund Team, Inc. · DRE #01394870
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