Richardson, TX · Updated June 2026
Water Heater Repair & Installation in Richardson: 2026 Rankings
Most Richardson homes built during the slab-on-grade boom of the 1960s-70s tucked their water heater into a small garage or hallway closet, which is exactly the kind of tight space where a tank swap needs a drain pan and expansion tank to meet current Texas plumbing code, or where a switch to tankless can actually free up real storage room. Two of the five companies below are physically headquartered in Richardson; the rest are area plumbing outfits with dedicated Richardson water heater service pages. We ranked them on local presence and stated years of plumbing experience rather than star counts, since not every company publishes those consistently for this specific service.
How we ranked these five
Water heater work is really a plumbing specialty, so we weighted this list toward a physical Richardson address first, then toward companies with a dedicated tank-and-tankless service page (rather than a generic plumbing page mentioning water heaters in passing), and finally toward any independently stated years of experience.
What we weighed: physical Richardson address 35% · dedicated water heater service page 30% · stated years of plumbing experience 25% · same-day or emergency service offered 10%.
Water heater companies serving Richardson, ranked
Koen Plumbing, Inc. Editor's Pick
- Physical Richardson address on N. Bowser Road
- Operating since 1946, the longest history on this list
Dean's Plumbing
- Second Richardson-headquartered company on this list
- Publishes both tank and tankless replacement with same-day service
Horizon Plumbing Services
- 50-plus years of stated plumbing experience, per its own site
- Dedicated Richardson water heater repair page
AugerPros Plumbing and Drain LLC
- Dedicated Richardson water heater installation/repair page
- Holds Texas Master Plumber License M-39680
Richardson water heater companies compared
| Company | Based in | Standout credential |
|---|---|---|
| Koen Plumbing, Inc. ★ | Richardson | Since 1946 |
| Dean's Plumbing | Richardson | Tank & tankless, same-day |
| Horizon Plumbing Services | Plano | 50+ yrs experience |
| AugerPros Plumbing and Drain LLC | Allen | License M-39680 |
| Genzel Plumbing Company | McKinney | Dedicated Richardson page |
Figures from public business websites as of June 2026; verify current details with each company.
Tank vs. tankless in a Richardson garage closet
Many Richardson homes from the 1960s-70s boom have a compact garage or hallway water heater closet sized for a standard tank, and switching to tankless can reclaim that space, though it usually requires upgraded gas line sizing and venting. Get quotes for both before deciding.
Frequently asked questions about water heaters in Richardson
Who is the best water heater company in Richardson, TX?
For 2026, our top pick is Koen Plumbing, Inc., headquartered on N. Bowser Road in Richardson and operating since 1946. Dean's Plumbing, also Richardson-based, is a strong second option, publishing both tank and tankless replacement with same-day service.
Does a water heater replacement in Richardson need a permit?
Yes, in most cases. Texas plumbing code generally requires a permit and inspection for water heater replacement, including a drain pan and expansion tank where applicable. A licensed plumber typically pulls the permit as part of the job.
Is tankless worth it for an older Richardson home?
It depends on the home. Many older Richardson houses have a compact garage or closet water heater setup, and a tankless conversion can free up that space, but it often requires larger gas line sizing and new venting, which adds to the upfront cost compared to a like-for-like tank swap.
How much does water heater replacement cost in Richardson?
A standard 40-50 gallon tank replacement typically runs $1,200-$2,500 installed in North Texas, while tankless conversions run higher, often $3,000-$6,000, depending on gas line and venting work required.