# 28400 Northwestern Hwy, Southfield Retail in Southfield, Michigan. It covers 15,171 square feet on the ground. Rates calibrated October 2, 2026. Review by December 31, 2026. Updated October 27, 2026. Method propdata-estimator-v6. ## This building 28400 Northwestern Hwy, Southfield. Retail in Southfield, Michigan. Property ID spgaa5a2ne84sny. ## Facts **Facts about 28400 Northwestern Hwy, Southfield** | Fact | Value | Source | | --- | --- | --- | | Address | 28400 Northwestern Hwy, Southfield, MI 48034 | [Overture Maps addresses](https://skypsi.com/property/mi/detroit/spgaa5a2ne84sny-28400-northwestern-hwy-southfield/#how-we-know) | | Building type | Retail | [USA Structures and SkyPSI estimator](https://skypsi.com/property/mi/detroit/spgaa5a2ne84sny-28400-northwestern-hwy-southfield/#how-we-know) | | Place name | Huntington Construction | [Overture Maps places](https://skypsi.com/property/mi/detroit/spgaa5a2ne84sny-28400-northwestern-hwy-southfield/#how-we-know) | | Place type | construction services | [Overture Maps places](https://skypsi.com/property/mi/detroit/spgaa5a2ne84sny-28400-northwestern-hwy-southfield/#how-we-know) | | Footprint | 15,171 square feet | [USA Structures](https://skypsi.com/property/mi/detroit/spgaa5a2ne84sny-28400-northwestern-hwy-southfield/#how-we-know) | | Perimeter | 591.68 feet | [USA Structures](https://skypsi.com/property/mi/detroit/spgaa5a2ne84sny-28400-northwestern-hwy-southfield/#how-we-know) | | Height | 48.1 feet | [USA Structures](https://skypsi.com/property/mi/detroit/spgaa5a2ne84sny-28400-northwestern-hwy-southfield/#how-we-know) | | Height survey year | 2017 | [USA Structures](https://skypsi.com/property/mi/detroit/spgaa5a2ne84sny-28400-northwestern-hwy-southfield/#how-we-know) | | Stories | 3 stories | [USA Structures](https://skypsi.com/property/mi/detroit/spgaa5a2ne84sny-28400-northwestern-hwy-southfield/#how-we-know) | | Exterior wall area | 28,458 square feet | [SkyPSI estimator](https://skypsi.com/property/mi/detroit/spgaa5a2ne84sny-28400-northwestern-hwy-southfield/#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) | $2,500 | $4,500 | $8,000 | | Facade wash with mold or growth treatment | $3,500 | $7,000 | $12,000 | **Exterior soft wash from a boom lift and by rope access, whole building** | Service | Low | Most likely | High | | --- | --- | --- | --- | | Facade wash, conventional access | $4,500 | $8,500 | $14,000 | ### Window cleaning **Window cleaning by drone, whole building** | Service | Low | Most likely | High | | --- | --- | --- | --- | | Exterior windows only | $1,000 | $2,000 | $3,000 | | Windows inside and out | $1,500 | $3,000 | $5,500 | **Window cleaning by rope access, whole building** | Service | Low | Most likely | High | | --- | --- | --- | --- | | Exterior windows, rope access | $6,000 | $12,500 | $22,000 | | Windows inside and out, rope access | $7,000 | $13,500 | $24,500 | ## Best method - [Exterior soft wash](https://skypsi.com/estimates/exterior-soft-wash/): Drone has the lowest cost, most likely $4,500. - [Window cleaning](https://skypsi.com/estimates/window-cleaning/): Drone has the lowest cost, most likely $2,000. ## Similar buildings nearby - [Retail in Southfield](https://skypsi.com/property/mi/detroit/spq9cxav650ra8t-retail-southfield/) - [28300 Northwestern Hwy, Southfield](https://skypsi.com/property/mi/detroit/spfmwezp4s9vbce-28300-northwestern-hwy-southfield/) - [28411 Northwestern Hwy, Southfield](https://skypsi.com/property/mi/detroit/sp2e0gt55j0yy6f-28411-northwestern-hwy-southfield/) - [28505 Northwestern Hwy, Southfield](https://skypsi.com/property/mi/detroit/spvhs6xgeycy0zx-28505-northwestern-hwy-southfield/) - [28588 Northwestern Hwy, Southfield](https://skypsi.com/property/mi/detroit/sp8dp11zzebe08s-28588-northwestern-hwy-southfield/) - [25505 W 12 Mile Rd, Southfield](https://skypsi.com/property/mi/detroit/sp4pp6egfd20en6-25505-w-12-mile-rd-southfield/) - [28240 Franklin Rd, Southfield](https://skypsi.com/property/mi/detroit/spj43nndn87ftzx-28240-franklin-rd-southfield/) - [28260 Franklin Rd, Southfield](https://skypsi.com/property/mi/detroit/spmrj01dadxe8zb-28260-franklin-rd-southfield/) ## 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. 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. 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/ Page: https://skypsi.com/property/mi/detroit/spgaa5a2ne84sny-28400-northwestern-hwy-southfield/ JSON: https://skypsi.com/property/mi/detroit/spgaa5a2ne84sny-28400-northwestern-hwy-southfield.json Content license: https://skypsi.com/content-license.txt