Almost every list of plumbers in Littleton is quietly wrong, and the reason is a postal accident rather than bad faith. The City of Littleton is the seat of Arapahoe County and occupies a compact footprint, but the Postal Service hung the name "Littleton" on a block of ZIP codes running from 80120 through 80130 that blankets a far larger area, most of it outside the city. Ken Caryl and Columbine sit in unincorporated Jefferson County. Roxborough and Sterling Ranch sit in Douglas County. All of them write "Littleton, CO" on their mail, and so do a great many businesses that have never held a City of Littleton contractor licence.
That distinction is not pedantry. It decides who issues your plumbing permit and who inspects the work. Inside city limits the permit comes from Littleton's own Building Division, which requires the contractor to be licensed with the city before a permit is issued. A few blocks west, in unincorporated Jefferson County, the permit comes from the county instead. A plumber who works one side of the line every day and the other side rarely is a plumber who will be learning your jurisdiction's process on your job.
So we set a harder bar than a ZIP-code match. Every company below publishes a street address whose city line reads Littleton, and we name the county that address falls in rather than letting the ZIP imply one. We then took each state licence number the company publishes and looked it up in Colorado's open licensee file, which carries the same records as the Division of Professions and Occupations lookup that blocks automated requests, and confirmed the status is Active with no revocation, suspension, surrender or restriction attached. We screened eleven companies. Five cleared. We quote no prices anywhere on this page, because none of these companies publishes a rate card and a number we could not attribute would be a guess dressed as a fact.
How We Evaluated Littleton Plumbing Companies
The Top 5 Plumbers in Littleton
2026 Rankings · Littleton, Colorado
Southside Plumbing
Southside Plumbing is the only company in this roster that publishes both halves of the Colorado credential on its own site: plumbing contractor registration PC.0001793 and master plumber licence MP.00188943. We looked up both. The contractor registration is Active, first issued in January 2008, and is recorded in the state file at a Littleton 80125 address, which matches the 8101 Midway Drive address the company publishes. The master licence belongs to Mark Friesen, Active since April 2005, with no disciplinary condition attached. That is the strongest documentary position on this page, and it took about ninety seconds to confirm because the company gave us the numbers to check.
The company dates itself to 2005 and states 4.9 stars across more than 900 Google reviews on its own site, alongside a smaller Yelp file and a Better Business Bureau accreditation opened in April 2025. Its stated service area is a tight, honest south-metro footprint: Littleton, Highlands Ranch, Lone Tree, Castle Pines, Centennial, Ken Caryl, Parker, Roxborough Village and Sterling Ranch. Read the boundary carefully before you call. Midway Drive is in Douglas County, not the City of Littleton, so a job inside city limits will be permitted by Littleton's Building Division rather than by the county this company is closest to. Ask how often they pull city permits.
Efficient Plumbing Services
Of the five, Efficient Plumbing Services has the address closest to the thing people mean when they say Littleton. Sycamore Street sits in the 80120 ZIP, the original Arapahoe County core built around the old downtown, rather than in the Jefferson or Douglas County overflow that shares the name. For a homeowner near Littleton Boulevard or Ketring Park, that proximity is the practical difference between a plumber who pulls City of Littleton permits as routine work and one who does it occasionally.
The company is a small family operation run by master plumber Brian Davis, who publishes his licence number rather than a generic badge. We checked it: MP.00188474 is Active, held by Brian Davis, first issued 28 December 2007 and recorded in the state file at a Littleton 80120 address, with no disciplinary status attached. The company describes itself as trading since 2000, which predates that licence, so read the 2000 date as the family business rather than as the individual credential. It publishes a five-year parts-and-labour guarantee on installations and a compact service list covering Littleton, Centennial, Southglenn, Englewood and Highlands Ranch. Its public review file is a fraction of the size of Southside's, which is the main reason it places second rather than first, and it is not a currently accredited BBB business.
An Affordable Plumber
An Affordable Plumber publishes both licence identifiers on its site, and both check out. Plumbing contractor registration PC.0003607 is Active in the state file, first issued 6 December 2016, recorded at a Littleton 80125 address, which corroborates the 2016 founding date the company claims rather than merely repeating it. The responsible master plumber, MP.00189299, is Travis Arbogast, Active since December 2006 with no disciplinary condition. Directory records place the business on Bear River Street in the 80125 ZIP, in Douglas County.
The service map is the most precisely drawn of any company here, and it is worth reading as a signal in itself. Rather than claiming the metro, the company draws a boundary: south of Hampden Avenue, west to E-470, east to Parker, south to Castle Rock, naming Roxborough, Ken Caryl, Chatfield Farms, Louviers, Sterling Ranch, Trailmark and Westridge inside it. A firm willing to say where it does not go is generally telling the truth about where it does. It places third rather than higher because its site publishes no street address and no aggregate review figure, so the address had to be corroborated from outside sources.
Drain Terrier
Drain Terrier publishes a Littleton headquarters at 6515 S. Allison Street in the 80123 ZIP, alongside a second address in Wheat Ridge. The 80123 ZIP is one of the more confusing on the map: it straddles unincorporated Jefferson County, the Columbine area and a sliver of far southwest Denver, and the Allison Street address falls on the Jefferson County side rather than inside City of Littleton limits.
The company is a drain and sewer specialist rather than a general plumbing shop, which is the right shape for the problem most Littleton homeowners actually call about: mature cottonwoods and silver maples over clay sewer laterals in neighbourhoods platted in the 1950s and 1960s. It states more than thirty years of trading and more than a thousand positive reviews across platforms, and third-party aggregation puts its Google file near 4.7 stars across roughly 390 reviews, with a separate Yelp file above a hundred. It ranks fourth on one specific gap rather than on workmanship: it publishes no Colorado licence or contractor registration number anywhere on its site, so nothing here could be verified against the state file the way the three companies above could. Ask for the number before you book.
Western Plumbing Solutions & Remodels LLC
Western Plumbing Solutions is the smallest operation on this page and the most transparent about it. Owner Wesley Hargrove is the licensed plumber, works the jobs, and publishes both numbers: master plumber MP.3001972 and plumbing contractor registration PC.0005413. Both are Active in the state file, and both are recorded at a Littleton 80127 address matching the Quail Circle address on the site. That address sits in the Ken Caryl area of unincorporated Jefferson County, so work there is permitted by the county rather than by the City of Littleton.
One fact belongs in the open, because it is the reason for the fifth position and a reader would want it: both licences were first issued in 2025, making this the newest registration in the roster by a wide margin. A recent licence date is not a defect, and a master plumber licence is not handed out casually, but it does mean there is far less public history to weigh here than for a firm trading since 2005. The third-party review file is correspondingly small, around 4.8 stars from roughly two dozen reviewers. Treat this as the option for a homeowner who wants the licence holder personally on site, and ask for references on work comparable to yours.
Frequently Asked Questions
Is my Littleton address actually in the City of Littleton?
Often not. The City of Littleton is the seat of Arapahoe County and also reaches small distances into Jefferson and Douglas counties, but the Postal Service assigned the name Littleton to a much larger block of ZIP codes running from 80120 to 80130 plus several PO Box ranges. Communities including Ken Caryl, Columbine, Roxborough and parts of Highlands Ranch use a Littleton mailing address while sitting entirely outside city limits, in unincorporated Jefferson or Douglas County. The practical test is not your ZIP code but your permit authority: if your building permits come from Littleton's Building Division you are inside the city, and if they come from the county building division you are not. Check before you hire, because the two processes are separate.
Who issues a plumbing permit in Littleton, and do I need one?
Plumbing work that installs, alters or replaces a system generally requires a permit and an inspection, and the issuing authority depends on which side of the city line the property sits on. Inside City of Littleton limits, permits come from the city's Building Division through its eTRAKiT portal, and the city requires a contractor to hold a city licence or registration certificate before a permit will be issued to them. For an address in unincorporated Arapahoe, Jefferson or Douglas County, the county building division issues the permit instead and applies its own contractor requirements. In every case the state expects the work to be performed by a plumber licensed by the Colorado State Plumbing Board. A contractor who cannot say which authority will permit your job is telling you something useful.
How do I check a Littleton plumber's Colorado licence myself?
Colorado licenses plumbers at the state level rather than the municipal level, through the State Plumbing Board within the Division of Professions and Occupations. The board's own online lookup is the official route, though it blocks automated queries. The same records are also published as open data through the Colorado Information Marketplace as the Professional and Occupational Licenses in Colorado dataset, refreshed nightly, which anyone can search by name or licence number. Ask the company for its master plumber number and its plumbing contractor registration number, then look up both. What you want to see is a status of Active. The file also records Revoked, Suspended, Voluntary Surrender, Active - Restricted and Active - With Conditions, and any of those warrants a conversation before you sign anything.
What is the difference between a master plumber, a journeyman and a plumbing contractor in Colorado?
They are different things and a company needs more than one of them. Master plumber, journeyman plumber and residential plumber are individual licence classes issued to people by the Colorado State Plumbing Board, earned through documented experience and examination, with the master licence carrying the broadest scope. A plumbing contractor registration is issued to the business, not the person, and a registered contractor must have a responsible master plumber attached to it. That is why the strongest listings on this page publish two numbers rather than one: a PC number for the firm and an MP number for the licence holder standing behind it. A business advertising only that it is licensed and insured, with no number attached, has told you nothing checkable.
What plumbing problems are most common in Littleton homes?
The housing stock shapes the call list. Much of central Littleton and the Columbine and Ken Caryl subdivisions was platted between the 1950s and the 1970s, which puts a lot of original clay and cast-iron sewer lateral under forty to seventy years of cottonwood, silver maple and elm roots, so root intrusion and lateral collapse are disproportionately common and often need a camera inspection rather than a guess. Older homes in the same vintage frequently still carry galvanized supply lines nearing the end of their service life. Newer construction in Roxborough and Sterling Ranch shifts the problem set toward pressure regulation and water heater and fixture service instead. If a company proposes a sewer replacement without showing you camera footage of the line, ask to see it.
Sources & References
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Colorado DORA, Division of Professions and Occupations
Colorado State Plumbing Board — licensing of master, journeyman and residential plumbers and registration of plumbing contractors
The licensing authority for every plumber on this page. The board's own lookup returns HTTP 403 to automated requests, so licence status was verified through the state's open data file instead.
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Colorado Information Marketplace, Colorado DORA
Professional and Occupational Licenses in Colorado (dataset 7s5z-vewr)
The open licensee file carrying the same records as the DORA lookup. Every MP and PC number cited on this page was checked here for status, first-issue date and city of record, and screened for revoked, suspended, surrendered or restricted status.
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City of Littleton, Colorado
Contractor Licensing and Renewal — Building and Development
Backs the statement that a city licence or registration certificate is required to obtain a permit for work inside Littleton city limits. Returns HTTP 403 to automated requests; verify in a browser.
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Arapahoe County, Colorado
Licenses, Permits and Approvals — Public Works and Development
Backs the point that the county building division permits unincorporated areas only, which is what separates a Littleton mailing address from a City of Littleton address. The site's robots.txt disallows automated fetching; it returns HTTP 200 in a browser.
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Jefferson County, Colorado
Permits — Planning and Zoning
The permitting authority for the Ken Caryl and Columbine addresses in the 80123, 80127 and 80128 ZIP codes that carry a Littleton mailing address. Returns HTTP 403 to automated requests.
Our Recommendation
Southside Plumbing is the pick on documentation. It publishes both its contractor registration and its master plumber licence, both verify as Active with no disciplinary history, its registration has been in force since 2008, and it carries the largest published review file of any company here. For a homeowner in the 80120 core, near the old downtown, Efficient Plumbing Services is the closer answer: an Arapahoe County address, a master licence verified in the owner's own name, and a five-year installation guarantee stated on the site. An Affordable Plumber is the strongest choice for the Roxborough and Sterling Ranch side of the map, and the only company here whose stated founding year is corroborated by the date on its state registration.
Whichever you call, ask two questions before the truck is dispatched. First: which authority permits my address, the City of Littleton or the county? A plumber who works your jurisdiction weekly will answer instantly. Second: what are your master plumber and plumbing contractor numbers? Both are public records, both take a minute to check against the state's open licensee file, and a company that hesitates over either has answered a different question than the one you asked.
Denver Dean's List maintains editorial independence. We do not accept payment for rankings or accept advertising from the companies we evaluate. Rankings are based on publicly available records, verified state licence data, and editorial research. No prices, hourly rates, or estimate policies are quoted on this page unless the company publishes them itself. Company information should be independently verified before making hiring decisions.