The 78 Corridor Discount

Drive ten minutes inland from Carlsbad on the 78 and the price of a house drops by about a third.

Carlsbad's three month median is about $1.50M. San Marcos is about $950K and Vista about $887K (SDAR / CRMLS InfoSparks, Sep 2026). Some of that is the beach and some of it is house size, so look at price per square foot, which takes the size out: Carlsbad sold at $641 a square foot in September, San Marcos at $496 and Vista at $491. That is still a discount of more than 20% per square foot for a home a few exits up the freeway.

Neither city is running hot right now. Both are roughly flat against a year ago on the three month median, and supply is under three months in both, so homes that are priced right still sell. San Marcos homes took a median 31 days in September; Vista's took 16.

What could change the gap is North City, the new downtown going up beside Cal State San Marcos: about 3,400 homes on 200 acres, a $2 billion build, with about 400 of them affordable (Voice of San Diego, Apr 2026). San Marcos chose to put its density there rather than spread it through the single family neighborhoods, which keeps those neighborhoods what they are while the district fills in.

San Marcos and Vista both have their own monthly reports now. San Marcos →   Vista →

Where Sellers Have the Edge

Countywide, detached homes had about 2.4 months of supply in September and sold in a median 16 days, down about 31% and 20% from a year ago, and the detached median was about $1,075,000, up 7.1% (SDAR / CRMLS InfoSparks, Sep 2026). Those are September closings, mostly contracts written before rates crossed 7%, so October is the month to watch. The tightest pockets in September were detached homes in Carmel Valley (about 1.0 month of supply), San Carlos (1.1), Lemon Grove (1.4), Rancho Peñasquitos (1.5) and La Costa (1.6) (SDAR / CRMLS InfoSparks, Sep 2026). One month of supply means that, at the current pace, every listing would be gone in about four weeks. Single month readings bounce around in small markets, so treat any one of these as a pocket worth a closer look, not a guarantee.

Where the Investor Math Works

Rent does not rise with price one for one, so cash flow still works best inland and in the urban core. Entry-tier areas like North Park, El Cajon, Lemon Grove and National City trade far below the coast and tend to pencil at better rent to price ratios, while La Jolla and Del Mar win on appreciation and lose on monthly cash flow. With the county detached median around $1.08M (SDAR / CRMLS InfoSparks, Sep 2026), the coast sits well above it and those inland pockets well below. At 7.28% on the 30-year fixed, the financing side of every one of those deals just got harder, which makes the purchase price matter even more. We describe the pattern the data supports; we do not make buy recommendations.

What's Moving Right Now

The rate is the story. The 30-year fixed went from 7.03% to 7.28% in one week, the highest since November 2023, with the 10-year Treasury around 5.2% (Freddie Mac, Oct 1 2026; Fox Business). A year ago it was 6.34%. On a $900,000 loan that difference is roughly $560 a month in principal and interest. September's county numbers do not show it yet: detached homes sold in a median 16 days on about 2.4 months of supply (SDAR / CRMLS InfoSparks, Sep 2026), and most of those deals were signed in August. October closings are where a 7% rate shows up first, in days on market before price.

The Outlook: What's Coming

Not predictions, just the calendar and what the forecasters said. The Fed meets October 27 to 28, its first meeting since the September 16 hike to 3.75% to 4.00% (Federal Reserve). The Mortgage Bankers Association expects the 30-year fixed around 6.8% at the end of 2026 and the end of 2027 (MBA, Sep 2026). Fannie Mae has 6.8% for the end of this year and 6.7% next, with national home prices up about 2.3% in 2026 and 1.0% in 2027 (Fannie Mae ESR, Sep 11 2026). Both of those were made before rates crossed 7%, so read them as the range forecasters expected, not where we are today. C.A.R. has not published its next-year California forecast yet.

One to Watch, One to Weigh

Worth the optimism: supply is still thin across most of the county, and the national median has now risen year over year for 38 straight months (NAR, Aug 2026). Even the forecasters who cut their numbers still have prices inching up, not falling.

Worth the caution: the 30-year fixed is above 7% for the first time since 2023, and on October 15 the FAIR Plan's average 29.1% rate increase takes effect for more than 675,000 California policyholders (Freddie Mac; KQED; CDI). Payment and insurance together now decide more deals than price does. Run both before you fall for a house.