Original Thornton, around 88th Avenue and Washington Street, is where the city began. Sam Hoffman's planned community went up here from 1953, and the first shopping center at 88th and Washington opened in 1955. Homes in this part of Thornton (ZIP 80229) are mostly ranch and split-level houses from the 1950s into the 1980s, so many are close to 70 years old.
What homeowners see: a main line that backs up every few months, gurgling toilets, brown water on the first draw of the day, and water heaters with a rusty or wet base. The causes are usually the original sewer lateral, with roots in a joint or a bellied section, and supply pipe that has corroded inside. Stop running water when a drain backs up, and do not keep plunging or pouring chemical opener into a main line problem. We run a camera through the line before recommending digging. See drain cleaning for clogs and sewer line repair when the camera finds damage.
Thornton water is hard. The city reports an average of about 200 mg/L (11.7 grains per gallon), and it can climb toward 250 mg/L in summer. That hardness builds scale and sediment on the lower element and tank floor, which is why water heaters here rumble, run out of hot water, or leak at the tank. If water is pooling under the tank, shut the cold supply on top of it and turn off the gas or power, then see water heater repair.
Call when sewage is coming up a drain, when a leak will not stop after you shut the main, or when a tank is leaking. If you smell gas, leave the house and call the gas utility first. We explain what we find and put a written scope and price in front of you to approve before work begins. Call (720) 856-5811, Monday to Saturday, 9am to 6pm.
Around Original Thornton
We regularly work near:
- 📍Site of the Thornton Shopping Center, northeast corner of 88th Avenue and Washington Street
- 📍Community Park
- 📍Thornton City Pool
- 📍Thornton Community Center
Plumber in Original Thornton · Local Notes
- •Thornton began as a planned community in 1953 and was incorporated in 1956. The Thornton Shopping Center at 88th and Washington opened in May 1955, so the oldest housing here is nearly 70 years old.
- •South Thornton homes are mostly split-level and ranch houses built from the 1950s to the 1980s. Original sewer laterals and supply pipe from that period are likely to be near the end of their service life.
- •The City of Thornton supplies water from the South Platte River and Clear Creek. Thornton Water reports hardness averaging about 200 mg/L (11.7 grains per gallon), from roughly 140 mg/L in winter to 250 mg/L in summer.
- •The Colorado Geological Survey lists expansive soils as a major hazard across the Denver metro and Front Range, including disruption of sewer lines and pipelines.