# 501 20th Street, Knoxville Medical in Knoxville, Tennessee. It covers 15,793 square feet on the ground. Rates calibrated October 2, 2026. Review by December 31, 2026. Updated October 11, 2026. Method propdata-estimator-v6. ## This building 501 20th Street, Knoxville. Medical in Knoxville, Tennessee. Property ID spfywkyb99c4ea5. ## Facts **Facts about 501 20th Street, Knoxville** | Fact | Value | Source | | --- | --- | --- | | Address | 501 20th Street, Knoxville, TN 37916 | [Overture Maps addresses](https://skypsi.com/property/tn/knoxville/spfywkyb99c4ea5-501-20th-street-knoxville/#how-we-know) | | Building type | Medical | [USA Structures and SkyPSI estimator](https://skypsi.com/property/tn/knoxville/spfywkyb99c4ea5-501-20th-street-knoxville/#how-we-know) | | Place name | Farrukh Siddiqui, MD, MPH | [Overture Maps places](https://skypsi.com/property/tn/knoxville/spfywkyb99c4ea5-501-20th-street-knoxville/#how-we-know) | | Place type | hospital | [Overture Maps places](https://skypsi.com/property/tn/knoxville/spfywkyb99c4ea5-501-20th-street-knoxville/#how-we-know) | | Footprint | 15,793 square feet | [USA Structures](https://skypsi.com/property/tn/knoxville/spfywkyb99c4ea5-501-20th-street-knoxville/#how-we-know) | | Perimeter | 533.37 feet | [USA Structures](https://skypsi.com/property/tn/knoxville/spfywkyb99c4ea5-501-20th-street-knoxville/#how-we-know) | | Height | 101.64 feet | [USGS 3D Elevation Program](https://skypsi.com/property/tn/knoxville/spfywkyb99c4ea5-501-20th-street-knoxville/#how-we-know) | | Height survey year | 2016 | [USGS 3D Elevation Program](https://skypsi.com/property/tn/knoxville/spfywkyb99c4ea5-501-20th-street-knoxville/#how-we-know) | | Stories | 7 stories | [USGS 3D Elevation Program](https://skypsi.com/property/tn/knoxville/spfywkyb99c4ea5-501-20th-street-knoxville/#how-we-know) | | Exterior wall area | 54,212 square feet | [SkyPSI estimator](https://skypsi.com/property/tn/knoxville/spfywkyb99c4ea5-501-20th-street-knoxville/#how-we-know) | ## Cost ranges Whole-building ranges from the SkyPSI estimator, calibrated October 2, 2026. Grade C: modelled from the Texas calibration. [What the grades mean](https://skypsi.com/estimates/methodology/confidence-grades/). ### Exterior soft wash **Exterior soft wash by drone, whole building** | Service | Low | Most likely | High | | --- | --- | --- | --- | | Facade wash (drone) | $4,500 | $8,000 | $13,500 | | Facade wash with mold or growth treatment | $6,500 | $12,000 | $20,500 | **Exterior soft wash from a boom lift and by rope access, whole building** | Service | Low | Most likely | High | | --- | --- | --- | --- | | Facade wash, conventional access | $8,000 | $14,500 | $24,500 | ### Window cleaning **Window cleaning by drone, whole building** | Service | Low | Most likely | High | | --- | --- | --- | --- | | Exterior windows only | $1,500 | $3,000 | $5,500 | | Windows inside and out | $2,500 | $5,500 | $9,500 | **Window cleaning by rope access, whole building** | Service | Low | Most likely | High | | --- | --- | --- | --- | | Exterior windows, rope access | $11,000 | $21,500 | $37,500 | | Windows inside and out, rope access | $12,000 | $23,500 | $42,000 | ## Best method - [Exterior soft wash](https://skypsi.com/estimates/exterior-soft-wash/): Drone has the lowest cost, most likely $8,000. - [Window cleaning](https://skypsi.com/estimates/window-cleaning/): Drone has the lowest cost, most likely $3,000. ## Similar buildings nearby - [2001 Laurel Avenue, Knoxville](https://skypsi.com/property/tn/knoxville/spn9f40qkcksgy5-2001-laurel-avenue-knoxville/) - [2014 Highland Avenue, Knoxville](https://skypsi.com/property/tn/knoxville/spmzj5d187r0dzg-2014-highland-avenue-knoxville/) - [2100 Clinch Avenue, Knoxville](https://skypsi.com/property/tn/knoxville/sp0kmsb6b9rag1w-2100-clinch-avenue-knoxville/) ## How we know Each fact names the source it comes from. A building file carries the source of each field, and SkyPSI shows that source beside the fact. - [USA Structures](https://disasters.geoplatform.gov/USA_Structures/): Building footprints, heights and occupancy from FEMA's USA Structures. - [Overture Maps addresses](https://docs.overturemaps.org/attribution/): Street addresses from the Overture Maps addresses theme. - [Overture Maps places](https://docs.overturemaps.org/attribution/): Business and place names from the Overture Maps places theme. - [SkyPSI estimator](https://skypsi.com/estimates/methodology/sources-and-licensing/): SkyPSI's own price model, calibrated rates and building-class rules. - [USGS 3D Elevation Program](https://www.usgs.gov/3d-elevation-program): Lidar elevation data that gives building heights where other sources have none. Cost ranges come from the SkyPSI estimator, calibrated October 2, 2026. [How a SkyEstimate is built](https://skypsi.com/estimates/methodology/how-a-skyestimate-is-built/). [Request a Quote](https://skypsi.com/request-a-quote) --- Sources: USA Structures, Overture Maps addresses, Overture Maps places, SkyPSI estimator, USGS 3D Elevation Program. Building footprints: USA Structures, FEMA Response Geospatial Office, Oak Ridge National Laboratory and U.S. Geological Survey (CC BY 4.0). https://disasters.geoplatform.gov/USA_Structures/ Addresses: Overture Maps Foundation, overturemaps.org (addresses theme), including the U.S. Department of Transportation National Address Database (NAD). https://docs.overturemaps.org/attribution/ Business names: Overture Maps Foundation, overturemaps.org (places theme, CDLA Permissive 2.0). https://docs.overturemaps.org/attribution/ Building heights from the U.S. Geological Survey 3D Elevation Program (public domain). https://www.usgs.gov/3d-elevation-program Page: https://skypsi.com/property/tn/knoxville/spfywkyb99c4ea5-501-20th-street-knoxville/ JSON: https://skypsi.com/property/tn/knoxville/spfywkyb99c4ea5-501-20th-street-knoxville.json Content license: https://skypsi.com/content-license.txt