# Union San Marcos

> Union San Marcos, San Marcos, TX: 10 units from $1,124/mo. See this building's full price history, tracked daily for every unit. Studio $1,124, 1BR $1,309.

Canonical: https://average-rent.com/city/san-marcos-tx/union-san-marcos-san-marcos-tx/

![Union San Marcos apartments in San Marcos, TX](https://average-rent.com/api/photo/p/15034?w=1200)

Prices last verified October 15, 2026

4.1 (792 reviews) [Official Website](https://unionsanmarcos.com/?switch_cls[id]=67805&utm_source=gmb&utm_medium=organic)

Prices last verified October 15, 2026; availability may have changed since

10

Units Listed

$1,124

Starting at

$1,339

Average

$1,520

Highest

$2.35

Per Sq Ft

[PRO](https://whop.com/work4coins-llc/average-rent-pro/): Avg Days Listed

How does this compare? [View San Marcos 78666 rent trends](https://average-rent.com/city/san-marcos-tx/trends/78666/)

Beds

## Pricing by Bedroom

Studio

$1,227

from $1,124 · 4 units

~425 sqft avg

1 Bed

$1,415

from $1,309 · 6 units

~667 sqft avg

### Rent Distribution

The final bar groups units at that price or more when the range is wide.

### Price by Bedroom

## Price Breakdown

### Rent by Unit

### Price vs. Square Footage

## Price History

Lines hold the last known price between updates. Diamond markers show changes in quote terms.

Timeframe

### Property Price Trend

### Recorded building rent history

| Date or category | Average monthly rent (USD) |
| --- | --- |
| 2026-07-07 | 1,435 |
| 2026-07-10 | 1,435 |
| 2026-07-11 | 1,318 |
| 2026-07-12 | 1,318 |
| 2026-07-13 | 1,318 |
| 2026-07-14 | 1,318 |
| 2026-07-15 | 1,318 |
| 2026-07-16 | 1,318 |
| 2026-07-17 | 1,318 |
| 2026-07-18 | 1,318 |
| 2026-07-19 | 1,318 |
| 2026-07-29 | 1,318 |
| 2026-07-30 | 1,283 |
| 2026-08-02 | 1,283 |
| 2026-08-03 | 1,283 |
| 2026-08-05 | 1,297 |
| 2026-08-06 | 1,086 |
| 2026-08-07 | 1,086 |
| 2026-08-08 | 1,086 |
| 2026-08-09 | 1,086 |
| 2026-08-10 | 1,086 |
| 2026-08-11 | 1,086 |
| 2026-08-12 | 1,086 |
| 2026-08-13 | 1,086 |
| 2026-08-14 | 1,070 |
| 2026-08-18 | 1,070 |
| 2026-08-19 | 1,070 |
| 2026-08-20 | 1,070 |
| 2026-08-21 | 1,070 |
| 2026-08-22 | 1,070 |
| 2026-08-23 | 1,070 |
| 2026-08-26 | 1,070 |
| 2026-08-27 | 1,070 |
| 2026-08-30 | 1,070 |
| 2026-09-03 | 1,070 |
| 2026-09-06 | 1,070 |
| 2026-09-09 | 1,070 |
| 2026-09-12 | 1,070 |
| 2026-09-15 | 1,070 |
| 2026-09-18 | 1,070 |
| 2026-09-21 | 1,070 |
| 2026-09-24 | 1,070 |
| 2026-09-27 | 1,070 |
| 2026-09-30 | 1,070 |
| 2026-10-03 | 1,070 |
| 2026-10-06 | 1,070 |
| 2026-10-09 | 1,339 |
| 2026-10-12 | 1,339 |
| 2026-10-15 | 1,339 |
| 2026-10-19 | 1,339 |
| 2026-10-22 | 1,339 |

## Estimated Building Revenue

Observed Lease Revenue

$22K/mo

from 19 tracked leases; not enough coverage yet for a whole-building estimate

Effective Rent on New Leases

$1,165

vs $1,339 current asking ($174 negotiation gap)

### Recent Lease Activity

29 units tracked; 19 assumed leased, 10 listed now

See which units leased, when they left the market, and the rent they leased at.

[Unlock with Pro](https://whop.com/work4coins-llc/average-rent-pro/)

## Property Intelligence

How is this calculated?

Negotiation Leverage Score (0-100)

Based on 5 observable signals from the property's listing data:

- +30 pts: 15+ units currently listed

- +25 pts: Active move-in specials

- +20 pts: Deep discounts (>$150/mo off)

- +15 pts: 5+ distinct floor plans

- +10 pts: 25+ units listed

All signals come directly from the property's own listings. Occupancy and building size appear only in the Estimated Building Revenue section, and only when the building size is stated by the property or our unit-level observation history is deep enough to model it.

Listed Units

10

Moderate availability

10 floor plans

Move-in Specials

0

No active promotions

Negotiation Leverage

Limited leverage

The available listings show few signs of room to negotiate.

### Price vs. San Marcos 78666

Neighborhood

[Millennium on Post](https://average-rent.com/city/san-marcos-tx/millennium-on-post-san-marcos-tx/): $599

[Cottages at San Marcos](https://average-rent.com/city/san-marcos-tx/cottages-at-san-marcos-san-marcos-tx/): $765

[The Lanes at Oslo Apartments](https://average-rent.com/city/san-marcos-tx/the-lanes-at-oslo-apartments-san-marcos-tx/): $800

[Savannah Club Apartments](https://average-rent.com/city/san-marcos-tx/savannah-club-apartments-san-marcos-tx/): $825

[The Ranch](https://average-rent.com/city/san-marcos-tx/the-ranch-san-marcos-tx/): $850

[Treehouse](https://average-rent.com/city/san-marcos-tx/treehouse-san-marcos-tx/): $865

[The Parlor](https://average-rent.com/city/san-marcos-tx/the-parlor-san-marcos-tx/): $869

[Encino Pointe](https://average-rent.com/city/san-marcos-tx/encino-pointe-san-marcos-tx/): $899

[Villas at Willow Springs](https://average-rent.com/city/san-marcos-tx/villas-at-willow-springs-san-marcos-tx/): $925

[Florencia Villas](https://average-rent.com/city/san-marcos-tx/florencia-villas-san-marcos-tx/): $1,000

Union San Marcos

$1,124

Comparing 11 apartments in San Marcos 78666. Click any bar to view that building.

[See San Marcos 78666 rent trends on the San Marcos, TX map](https://average-rent.com/city/san-marcos-tx/rent-map/) [Explore San Marcos, TX on the interactive map](https://average-rent.com/search/#city=san-marcos-tx)

## Available Units

Sort

10 units

Select a unit to see its price history and link to the rental site.

These prices were last verified on October 15, 2026. We have not been able to confirm current availability since, so some units may no longer be listed.

Studio

$1,124/mo

425 ft² · $2.64/ft²

Available: Contact for availability

Studio

$1,129/mo

425 ft² · $2.66/ft²

Available: Contact for availability

1 Bed

$1,309/mo

650 ft² · $2.01/ft²

Available: Contact for availability

1 Bed

$1,319/mo

683 ft² · $1.93/ft²

Available: Contact for availability

Studio

$1,324/mo

425 ft² · $3.12/ft²

Available: Contact for availability

| Unit | Floor Plan | Bed/Bath | Sqft | Price | $/Sqft | Available | Listed | Details |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| -- | | Studio / --ba | 425 | $1,124 | $2.64 | -- | [Pro](https://whop.com/work4coins-llc/average-rent-pro/) | |
| -- | | Studio / --ba | 425 | $1,129 | $2.66 | -- | [Pro](https://whop.com/work4coins-llc/average-rent-pro/) | |
| -- | | 1bd / --ba | 650 | $1,309 | $2.01 | -- | [Pro](https://whop.com/work4coins-llc/average-rent-pro/) | |
| -- | | 1bd / --ba | 683 | $1,319 | $1.93 | -- | [Pro](https://whop.com/work4coins-llc/average-rent-pro/) | |
| -- | | Studio / --ba | 425 | $1,324 | $3.12 | -- | [Pro](https://whop.com/work4coins-llc/average-rent-pro/) | |
| -- | | Studio / --ba | 425 | $1,329 | $3.13 | -- | [Pro](https://whop.com/work4coins-llc/average-rent-pro/) | |
| -- | | 1bd / --ba | 650 | $1,410 | $2.17 | -- | [Pro](https://whop.com/work4coins-llc/average-rent-pro/) | |
| -- | | 1bd / --ba | 683 | $1,420 | $2.08 | -- | [Pro](https://whop.com/work4coins-llc/average-rent-pro/) | |
| -- | | 1bd / --ba | 650 | $1,510 | $2.32 | -- | [Pro](https://whop.com/work4coins-llc/average-rent-pro/) | |
| -- | | 1bd / --ba | 683 | $1,520 | $2.23 | -- | [Pro](https://whop.com/work4coins-llc/average-rent-pro/) | |

## Garages and parking

Parking, wellness and pet policy details for this building are available to Pro members: garage type and any monthly fee, bike storage, EV charging, amenities such as a sauna or cold plunge, and stated pet rent and weight limits.

[Unlock with Pro](https://whop.com/work4coins-llc/average-rent-pro/)

## Train activity

### Trains close by

Freight line 1,995 ft away · 12 trains/day

- 6 daytime, 6 overnight

- No road crossing within earshot. Horns unlikely.

- Operator: UP

[Why this matters →](https://average-rent.com/how-it-works/#train-noise)

City Club

## Resident Notes & Access Codes

Real tips from people who lived at this property: what leasing and daily living are actually like, plus the gate, parking, and entry codes you only learn once you move in. [See all San Marcos, TX notes](https://average-rent.com/city/san-marcos-tx/resident-access/)

No resident notes for this property yet.

## Similar Apartments in San Marcos, TX

[The Lanes at Oslo Apartments](https://average-rent.com/city/san-marcos-tx/the-lanes-at-oslo-apartments-san-marcos-tx/): ![The Lanes at Oslo Apartments apartments](https://average-rent.com/api/photo/p/22681?w=640) From $800/mo 4.1 rating 6 units 2.4 mi away · 29% below

[SYNC at Purgatory Creek](https://average-rent.com/city/san-marcos-tx/sync-at-purgatory-creek-san-marcos-tx/): ![SYNC at Purgatory Creek apartments](https://average-rent.com/api/photo/p/22679?w=640) From $1,295/mo 4.3 rating 20 units 3.0 mi away · 15% above

[The Local Downtown](https://average-rent.com/city/san-marcos-tx/the-local-downtown-san-marcos-tx/): ![The Local Downtown apartments](https://average-rent.com/api/photo/p/15032?w=640) From $1,034/mo 4.6 rating 4 units 1.2 mi away · 8% below

[Ashford Wellington Apartments](https://average-rent.com/city/san-marcos-tx/ashford-wellington-apartments-san-marcos-tx/): ![Ashford Wellington Apartments apartments](https://average-rent.com/api/photo/p/22685?w=640) From $1,149/mo 4.8 rating 4 units 2.7 mi away · 2% above

[Stone Brook Seniors](https://average-rent.com/city/san-marcos-tx/stone-brook-seniors-san-marcos-tx/): ![Stone Brook Seniors apartments](https://average-rent.com/api/photo/p/22692?w=640) From $1,475/mo 4.2 rating 9 units 3.2 mi away · 31% above

[Cabana Beach San Marcos](https://average-rent.com/city/san-marcos-tx/cabana-beach-san-marcos-san-marcos-tx/): ![Cabana Beach San Marcos apartments](https://average-rent.com/api/photo/p/22682?w=640) From $1,255/mo 3.4 rating 2 units 3.2 mi away · 12% above

### San Marcos 78666 Rent Trends

See how rent prices are changing in San Marcos 78666 and across San Marcos, TX.

[View Trends](https://average-rent.com/city/san-marcos-tx/trends/78666/)