# 21137 Boulder Flats, San Antonio, TX 78266 > **TL;DR:** 4bd/2ba single family, $383,500 ($216/sqft), built 2025, 1,778 sqft. > A/C, 2-car garage. Est. $3,011/mo. ## Property at a Glance | Attribute | Value | |-----------|-------| | Price | $383,500 | | Price/sqft | $216 | | Bedrooms | 4 | | Bathrooms | 2 full | | Square Feet | 1,778 | | Year Built | 2025 | | Lot Size | 6,098 sqft (0.14 acres) | | Garage | 2-car | | Property Type | Single Family (Other) | | Status | Active | | Days on Market | 0 | ## Estimated Monthly Costs | Category | Amount | |----------|--------| | Principal & Interest (20% down, 30-year at 6.5%) | $1,939 | | Estimated Insurance | $112 | | HOA | $960 | | **Total** | **$3,011** | ## Nearby Schools - **Elementary:** Bulverde - **Middle:** Tex Hill - **High:** Johnson ## Key Amenities - A/C - 2-car garage ## Property Highlights - Built in 2025 - 0.14 acre lot ## Description ### Agent Description 5% lender incentive offered with the use of the seller's in-house lender, Incentive may be used towards buyer closing costs and/or rate buy-down, subject to lender approval and buyer qualification. **Tour this home anytime - no appointment or agent needed. Simply verify your ID at the door and explore on your own schedule, 7 days a week. The Gaven floorplan - This thoughtfully designed single-story home offers a well-balanced open-concept layout ideal for modern living. Featuring 4 bedrooms and 2 bathrooms, the home provides flexible space for families, guests, or a home office. The kitchen flows seamlessly into the dining and family room, creating a bright and inviting central space perfect for everyday living and entertaining. The kitchen includes quartz countertops, a center island, stainless steel appliances, gas range, and ample cabinetry. The private primary suite is located at the rear of the home and features an en-suite bath with walk-in shower, dual vanities, and a spacious walk-in closet. Secondary bedrooms are well-positioned for added privacy. Additional highlights include smart home technology, energy-efficient construction, a covered patio, full landscaping with irrigation, and convenient access to major highways, shopping, dining, and local amenities. ## Location - **Address:** 21137 Boulder Flats, San Antonio, TX 78266 - **County:** Bexar - **Coordinates:** 29.637071, -98.385338 - **Google Maps:** https://www.google.com/maps?q=29.637071,-98.385338 ## Virtual Tour & Media - **Video Tour:** https://www.zillow.com/view-imx/5802b88b-05bb-4e34-9ecb-855e0b64fbba?wl=true&setAttribution=mls&initialViewType=pano ## Listing Agent - **Name:** Christopher Marti - **Brokerage:** KELLER WILLIS SAN ANTONIO INC - **Phone:** (210) 696-9996 - **Broker Phone:** (210) 696-9996 - **Listing URL:** [View original listing](https://www.realtor.com/realestateandhomes-detail/21137-Boulder-Flts_San-Antonio_TX_78266_M95917-50179?f=listhub&s=SABORTX&m=1961978&c=propsimple) ## Photos ![21137 Boulder Flats - Photo 1](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f2799402482r.jpg) ![21137 Boulder Flats - Photo 2](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f1107302823r.jpg) ![21137 Boulder Flats - Photo 3](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f1181813094r.jpg) ![21137 Boulder Flats - Photo 4](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f4068073082r.jpg) ![21137 Boulder Flats - Photo 5](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f1879911797r.jpg) ![21137 Boulder Flats - Photo 6](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f3369543688r.jpg) ![21137 Boulder Flats - Photo 7](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f671791628r.jpg) ![21137 Boulder Flats - Photo 8](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f639654403r.jpg) ![21137 Boulder Flats - Photo 9](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f2640977142r.jpg) ![21137 Boulder Flats - Photo 10](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f2596629028r.jpg) ![21137 Boulder Flats - Photo 11](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f2144016406r.jpg) ![21137 Boulder Flats - Photo 12](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f1253647621r.jpg) ![21137 Boulder Flats - Photo 13](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f1529849760r.jpg) ![21137 Boulder Flats - Photo 14](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f3724968344r.jpg) ![21137 Boulder Flats - Photo 15](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f3856760547r.jpg) ![21137 Boulder Flats - Photo 16](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f2602859142r.jpg) ![21137 Boulder Flats - Photo 17](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f4058079324r.jpg) ![21137 Boulder Flats - Photo 18](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f4243467237r.jpg) ![21137 Boulder Flats - Photo 19](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f2919545589r.jpg) ![21137 Boulder Flats - Photo 20](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f4280292775r.jpg) ![21137 Boulder Flats - Photo 21](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f1234127061r.jpg) ![21137 Boulder Flats - Photo 22](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f2241628534r.jpg) ![21137 Boulder Flats - Photo 23](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f281075230r.jpg) ![21137 Boulder Flats - Photo 24](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f3147985994r.jpg) ![21137 Boulder Flats - Photo 25](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f1773804984r.jpg) ![21137 Boulder Flats - Photo 26](http://lh.rdcpix.com/94e99d06a44d923d7825347c5b76408el-f386500271r.jpg) --- **MLS#:** 1961978 | **Updated:** 2026-09-22 **Source:** listhub *Copyright © 2026 LERA MLS. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.* [View on PropertySimple](https://www.propertysimple.ai/listing/21137-boulder-flats-san-antonio-tx-78266-1961978) --- ## Structured Data ```json { "@context": "https://schema.org", "@type": "RealEstateListing", "@id": "https://www.propertysimple.ai/listing/21137-boulder-flats-san-antonio-tx-78266-1961978#listing", "url": "https://www.propertysimple.ai/listing/21137-boulder-flats-san-antonio-tx-78266-1961978", "name": "21137 Boulder Flats, San Antonio, TX 78266", "description": "5% lender incentive offered with the use of the seller's in-house lender, Incentive may be used towards buyer closing costs and/or rate buy-down, subject to lender approval and buyer qualification. **Tour this home anytime - no appointment or agent needed. Simply verify your ID at the door and explore on your own schedule, 7 days a week. The Gaven floorplan - This thoughtfully designed single-story home offers a well-balanced open-concept layout ideal for modern living. Featuring 4 bedrooms and 2 bathrooms, the home provides flexible space for families, guests, or a home office. The kitchen flows seamlessly into the dining and family room, creating a bright and inviting central space perfect for everyday living and entertaining. The kitchen includes quartz countertops, a center island, stainless steel appliances, gas range, and ample cabinetry. The private primary suite is located at the rear of the home and features an en-suite bath with walk-in shower, dual vanities, and a spacious walk-in closet. Secondary bedrooms are well-positioned for added privacy. 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