78070 / Spring Branch, TX: A Real Estate Guide for Buyers, Sellers, and Investors

Four Sub-Markets, Not One ZIP Code

A single “median price for Spring Branch” hides more than it reveals. As of March 2026, Mystic Shores carried a median list price of $1.1875 million across 161 active listings and 127 days on market; West Canyon Lake ran $752,450 across 186 listings at 114 days; Cypress Cove, which advertises park access toward the Guadalupe River, sat at $385,000 across 58 listings and 86 days; Rebecca Creek listed at $394,500 across 42 listings and just 45 days; Rivermont listed at $480,000 across 18 listings and 114 days, down 12.56% year over year (data compiled by Sunrise Realty Group from Realtor.com and Zillow figures).

Rebecca Creek’s 45-day average is less than half of Mystic Shores’ 127 days; a buyer comparing offer strategy across these two submarkets with one blended DOM figure would misjudge both.

Schools: Confirm Your District Before You Offer

Comal Independent School District is the default for 78070. The district’s own materials describe covering all 589 square miles of Comal County and name Spring Branch among its ten core communities, with Smithson Valley High and Middle among the schools serving the area, per Comal ISD’s own site. But the ZIP is not contained entirely within Comal County: ZIP-Codes.com’s geographic profile confirms 78070 is “primarily assigned to Comal County” while also covering mailboxes in Blanco County and Kendall County. A parcel that falls in the Blanco County sliver of 78070 can sit outside Comal ISD’s attendance boundary even while sharing the same ZIP code and the same Spring Branch mailing address. A Blanco ISD listing next to a Spring Branch address is not always an error; it can be a genuine county-line effect. Confirm attendance zone by parcel address through Comal ISD’s own locator before an offer is contingent on a specific school.

Is 78070 in Comal ISD or Blanco ISD? Most of the zip is Comal ISD, whose boundary covers the entire county. A smaller portion of 78070 crosses into Blanco County, where the applicable district can differ. Confirm by parcel, not by ZIP code, before writing an offer contingent on a specific school.

What the Current Market Data Shows

Independently checked in July 2026, HAR.com reports a June 2026 average price of $495,395 for the 78070 zip at $260 per square foot. Homes.com’s city guide reports a trailing-12-month median sale price of $525,000 for the broader Spring Branch, TX area, down 2% from the prior 12 months, with homes selling in 107 days on average against a 57-day national benchmark. Realtytrac separately counts 568 active 78070 listings against 483 sales in the trailing 12 months.

Why do home-price figures for Spring Branch differ between sites? Different platforms scope to different boundaries (a ZIP code versus a city name) and report different statistics (average versus median). A $30,000 gap between two current figures usually reflects that.

At roughly 14 months of supply against a 57-day national benchmark, this reads as a buyer-favorable market at the ZIP level; a seller in the fast-moving Rebecca Creek submarket at 45 days is operating in the opposite condition from a seller in Mystic Shores at 127 days.

Investing in 78070: Short-Term Rentals, Land, and Tax Valuation

For the Canyon Lake portion of 78070, a legal guide to the area’s short-term rental rules describes a three-party governance structure: the City of New Braunfels’ extraterritorial jurisdiction often applies even to Canyon-Lake-addressed properties and functions as the first permitting gate; Comal County’s Engineer’s Office treats converting a home to a commercial STR as a “change in use” that can trigger a septic system upgrade if advertised guest capacity exceeds the original design; and the Water Oriented Recreation District, known locally as W.O.R.D., collects a 3% lodging user fee on gross rental income, paid quarterly, separate from any city tax. New Braunfels itself levies a 7% hotel occupancy tax on qualifying short-term rentals, with filings due the 20th of each month and escalating penalties for late filing.

An STR buyer on Canyon Lake is stacking three separate approvals, not one: city zoning, a county septic review, and a district tax registration, each with its own office and its own timeline.

For land-value plays, the Comal Appraisal District’s open-space guidelines set a minimum of three animal units for a qualifying livestock operation and specify per-operation acreage standards; a vineyard operation, for instance, needs roughly 3 acres. One compliance guide reports that Comal County typically expects at least 10 acres for most general agricultural operations to qualify, though the appraisal district’s own guidelines note the exact minimum is set per operation type rather than as one countywide figure. Comal County’s 2024 exemption schedule sets the general residence homestead exemption at 20% of value or $5,000, whichever is greater. Converting an existing ag valuation to a wildlife-management valuation, per the Texas Parks and Wildlife Department’s legal summary, requires the land to already carry a 1-d-1 open-space ag valuation, implementation of at least three of seven listed wildlife practices such as habitat control or supplemental water, and, per multiple advisory sources, five years of prior ag-valuation history; there is no acreage floor unless the tract has been reduced in size since the prior tax year. Applications for either valuation type are due to the appraisal district by May 1 of the tax year.

Can I legally run a short-term rental in Comal County? In the Canyon Lake area, expect three separate approvals: the City of New Braunfels’ ETJ zoning process, a Comal County septic (OSSF) review if you’re advertising more guests than the system was designed for, and W.O.R.D. registration for the 3% lodging fee. Elsewhere in the 78070 zip, confirm with the county directly, since STR rules are set locally and vary by exact parcel.

Infrastructure and the Cost of Getting Rural Property Wrong

Guadalupe River corridor properties carry a documented, dated flood history. On July 4 to 5, 2025, the National Weather Service issued a Flood Warning specifically for the Guadalupe River at Spring Branch, forecasting a crest into moderate flood stage overnight. In the same week, Canyon Lake rose from 46% full to nearly 62% full, according to Texas Water Development Board data reported by Texas Public Radio. Comal County’s Engineer’s Office administers Floodplain Development Permits under the county’s Flood Damage Prevention Order, and a FEMA Elevation Certificate is required for qualifying construction in Zone AE and related flood zones before a structure can be properly insured. Comal County received $1 million in December 2025 under Texas Senate Bill 5 to expand its outdoor flood-warning siren network after the 2025 event, according to the Herald-Zeitung.

No source captured in this research states an exact percentage of 78070 parcels inside a mapped 100-year floodplain, or a typical flood-insurance premium range for the area. A buyer on the river corridor should verify that directly through FEMA’s Flood Map Service Center and a licensed insurance agent before waiving a flood contingency.

Does my property need flood insurance? Lenders require it in FEMA-mapped high-risk zones; outside those zones it’s optional but not irrelevant, given the documented 2025 flood reached Spring Branch itself. Confirm the parcel’s flood-zone designation through FEMA’s map service before closing.

Recreation and Community

78070 keeps most day-to-day life close to Smithson Valley: groceries at an H-E-B plus roughly seven miles south on 281, a second store about ten miles north, and casual dining that includes Mariscos El Paisa, a Mexican and seafood spot about five miles north of Smithson Valley known locally for its fish tacos. Canyon Lake itself sits roughly 20 miles north of the interior neighborhoods, close enough for a day trip.