Last updated 2026-08-19
TL;DR
Colorado does not issue a statewide irrigation contractor license. Your paper cost is a stack of local contractor cards, a Secretary of State business filing (Articles of Organization have long been $50 online), a free sales tax account, insurance, and extra state credentials only if you tap potable plumbing, wells, or chemigation. Confirm every fee with the board that collects it. Timelines run from same-day filings to multi-year plumbing experience if you go that route.
How much does irrigation contractor cost in Colorado?
Colorado has no statewide irrigation contractor license fee, because the state does not issue that license. Your real cost is a pile of other paper. You pay for a business entity, a sales tax account, city or county contractor cards, insurance, and extra state credentials only if the job hits potable plumbing, wells, or chemigation.
Start with the cheap, certain numbers. The Colorado Secretary of State has long charged $50 to file Articles of Organization online for an LLC. [4] A Colorado sales tax license through the Department of Revenue carries no state fee. [5] Those two filings get you a legal entity and a tax account. They do not let you pull a permit on a Denver lot.
Local contractor licenses are where the cash and the friction live. Denver, the Pikes Peak Regional Building Department around Colorado Springs, Aurora, Fort Collins, and most other cities run their own contractor programs. Fees move. I would not budget a number I cannot point to on that city's form. Pull the current application from the city that matches your first jobs.
Connect irrigation to potable water, set or replace a backflow assembly, or do other work the plumbing statute covers, and you are in DORA Plumbing Board territory. That path has exam fees, application fees, and years of experience. Confirm the current dollar amounts on the board's applications page before you write a check. [11]
Insurance will dwarf the filing fees. General liability for a small irrigation shop is a market quote, not a state tariff. Workers' compensation is required once you have employees, with limited exceptions. [6] Nobody publishes a clean statewide average for first-year irrigation shop insurance in Colorado. Ask two agents and compare the exclusions.
Someone quotes you a single Colorado irrigation license fee? They are mixing this state up with states that actually sit an irrigator exam. Look at irrigation contractor cost in Arizona or irrigation contractor cost in California if you also bid across a state line.
Do you need a license for irrigation contractor in Colorado?
No. Colorado does not issue a statewide irrigation contractor license.
DORA licenses plumbers, electricians, and a long list of other trades. Irrigation contractor is not on that list. Title 12, Article 155 of the Colorado Revised Statutes is the plumbing practice act. It says a person shall not "engage in or work at the business, trade, or calling of a residential plumber, journeyman plumber, or master plumber in this state until the person has received a license from the board." [1] That sentence is about plumbers. It is not an irrigator card.
You still need permission to do business. Cities issue contractor licenses. The Department of Revenue issues the sales tax account. The Secretary of State records your entity. None of those is an irrigation license.
Two other state licenses sit next to irrigation work, and people mix them up. Construct water wells or install pumping equipment, and you need a license from the State Board of Examiners of Water Well Construction and Pump Installation Contractors under Title 37, Article 91. [2] Inject fertilizer or pesticide through an irrigation system, and the Chemigation Act in Title 35, Article 11 requires a permit from the Colorado Department of Agriculture. [3]
A drip retrofit that never touches the potable connection, never pulls a well, and never chemigates may only need the local contractor card plus your business filings. A new system tied into a domestic water line is a different legal object. Read the job before you decide you are unlicensed and free.
How long does irrigation contractor take in Colorado?
The entity and tax pieces can be fast. An online LLC filing with the Secretary of State is often same day once the form is accepted. [4] A sales tax account through Revenue Online is a short administrative step, not an apprenticeship. Confirm current processing on the Department of Revenue register-a-business page, because queues change and I will not invent a turnaround. [5]
City contractor licenses are the wildcard. Some building departments issue a card after an application, insurance proof, and a fee. Others want an exam, a trade affidavit, or a wait for a board date. Denver's contractor and trades licensing desk and the Pikes Peak Regional Building Department each run their own clock. [12] [13] Call the city you will actually work in. Do not borrow another city's timeline.
The long path is plumbing, and only if your work needs it. A residential, journeyman, or master plumber license under Article 155 is an experience plus exam route, not a weekend class. [1] [11] Plan in years if you are starting from zero hours, not in weeks. The board sets the experience evidence. Confirm it on the current applications page.
Well construction and pump installation licenses under Title 37 are their own multi-step board process. [2] [8] Chemigation permits track the site and the equipment, not your career calendar. [3] [7]
Stay on the landscape side of the backflow device with a city card already in hand, and you can be legally open the day the city says the license is active and your insurance binder is in. That is the honest range. There is no statewide irrigation timer because there is no statewide irrigation license.
What state licenses actually touch irrigation work in Colorado?
Three state regimes show up on real irrigation jobs. Most shops only hit one. Some hit none beyond local paper.
Plumbing is the common hook. Article 155 covers people who work as residential, journeyman, or master plumbers. [1] The potable tap, the backflow assembly on a domestic line, and other plumbing as the statute defines it sit with that board. Downstream irrigation pipe after a legal connection is a gray zone that cities treat differently. I would not guess. I would ask the building department that will inspect the job, in writing if the dollar amount is large.
Well construction and pump installation is a different trade. Title 37, Article 91 created a separate board under the Division of Water Resources. [2] [8] Drilling, altering a well, or installing pumping equipment is not something you pick up because you already trench laterals. If the customer wants a new well for a field, send it to a licensed well contractor or get that license yourself.
Chemigation is a permit, not a contractor card. Title 35, Article 11 and the Colorado Department of Agriculture program apply when fertilizer or pesticide goes through the irrigation system. [3] [7] Plenty of urban lawn contractors never need it. Agricultural and large turf jobs do.
There is still no fourth card labeled irrigation contractor at the state level. That is the fact people trip over when they copy a checklist from irrigation contractor cost in Florida or irrigation contractor cost in Georgia.
What does a Colorado plumbing license cost if your irrigation work needs one?
I will not invent DORA's current application or exam fee. Those numbers sit on the Plumbing Board applications page, and they move. [11] Budget the fee the page shows the week you apply, plus whatever the testing vendor charges to sit the exam, plus the time to assemble experience evidence.
The legal trigger is the work, not your business card. If the job is plumbing as Article 155 defines it, an unlicensed person is in the wrong place. [1] If the job is irrigation piping after a legal potable connection that a licensed plumber already made, some cities will let a locally licensed contractor finish the laterals. Some will not. Get the inspector's read before you bid the tap.
I would not sit the master plumber exam just to sell drip conversions and controller swaps. That is a long, expensive way to do work a local contractor license already covers in many Front Range towns. I would hire or subcontract a licensed plumber for the potable tie-in and the assembly, then keep the trenching and zoning if the city allows the split. Confirm that split. Do not assume it.
Already hold out-of-state plumbing hours? Ask DORA about endorsement or experience credit. The board decides. Processing time is not something I will promise.
What local contractor licenses and permits do Colorado cities require?
Colorado does not run a statewide general contractor license for this trade. Cities and regional building departments fill that hole, which is why your cost depends on your map.
Denver runs contractor and trades licensing through Community Planning and Development. [12] The Pikes Peak Regional Building Department licenses contractors for Colorado Springs and several neighboring jurisdictions. [13] Aurora, Fort Collins, Lakewood, Thornton, and county building departments each have their own packet. A Denver card does not automatically travel to El Paso County.
Expect the packet to ask for identity, entity documents, insurance, and a fee. Some desks add a trade exam or a supervisor named on the license. I have no honest statewide fee table because these are local tariffs. Confirm the current amount on that department's contractor page the week you apply.
Permits are separate from the license. A new system, a tap, a backflow replace, or work in the right of way can each need a permit even after you hold the card. Right-of-way and street-cut fees can exceed the contractor license fee on a single job. Ask before you price a tap in the parkway.
Bounce between mountain towns and the Front Range, and you should price a license in each market you will actually bill. Buying five unused city cards in January is a waste of money.
What first-year business filings and insurance cost in Colorado?
Form the entity first if you want the liability box. Articles of Organization for a Colorado LLC have long been $50 online at the Secretary of State. [4] A statement of trade name is a separate SOS filing if you operate under a name that is not the entity's legal name. Confirm that add-on fee on the SOS fee list before you file. Periodic reports keep the entity active. Miss one and you will spend more fixing it than the original filing.
Register the tax accounts next. Use the Department of Revenue business registration path for the sales tax license. The state fee for that license is $0. [5] Wage withholding and unemployment accounts show up once you have employees. Do not ignore them because you call your helper a sub. Colorado looks at the facts of the relationship.
Workers' compensation is not optional once you have employees, with limited statutory exceptions. [6] CDLE's Division of Workers' Compensation is the agency. Premiums are a market product. A solo owner-operator without employees is in a different spot than a three-person crew. Get a written quote. Skipping the policy to save a month of premium is how a single knee injury closes a shop.
General liability and auto on the truck will cost more than every state filing combined. I would buy those before a new trencher. I would not buy a fancy shop suite or a wrapped fleet the first year. Rent the yard. Put the cash in insurance and a reliable used truck.
Do you need a chemigation permit or a well license for irrigation jobs?
Only if the job actually does those things.
Chemigation is the injection of fertilizer or pesticide through an irrigation system. Colorado regulates it under Title 35, Article 11. [3] The Colorado Department of Agriculture runs the permit program and posts the current packet on its chemigation page. [7] Lawn shops that never inject anything do not need this permit. A farm pivot or a sports field that fertigates does. Confirm the current permit fee with CDA. I will not invent it.
Well construction and pump installation sit under Title 37, Article 91 and the Board of Examiners at the Division of Water Resources. [2] [8] Building a well, changing a well, or installing pumping equipment is licensed work. Hooking laterals to an existing, legal source after the pump side is done is usually not the same license. The board's well construction pages are the place to confirm the line.
I would not take a well job because a customer asked the irrigation guy to "just add a pump." That is how you buy a complaint. Send it or get licensed.
What backflow and cross-connection rules affect irrigation contractors in Colorado?
Irrigation taps on potable systems are cross-connections. Colorado's Water Quality Control Commission puts the legal load on public water systems through Regulation 11 (5 CCR 1002-11), the Colorado Primary Drinking Water Regulations. [14] Systems have to run a cross-connection control program. That is why the city or the water provider will not shrug at an unprotected irrigation tap.
In practice you will see a required backflow assembly, a test, and a record. Testing is its own credential path, often an ASSE tester certification the water provider accepts. Holding a city contractor card does not make you a tester. Do not bid annual tests unless you hold what that water system accepts.
Installation of the assembly on a potable line is the kind of work that pulls you toward the plumbing statute. [1] I would treat the assembly as plumbing unless the local building official says otherwise in writing. The laterals after the assembly are the irrigation side of the argument.
CSU Extension's watering guidance is about how much landscape actually needs, not about the license. Established Colorado lawns often need on the order of an inch to an inch and a half of water a week in the heat of summer, which is why oversized clocks and unprotected taps show up on the same properties. [9] Efficient hardware does not replace a legal connection.
Are the Irrigation Association CIC and WaterSense credentials required in Colorado?
No. They are voluntary.
The Irrigation Association's Certified Irrigation Contractor credential is a national private certification. Colorado does not make it a condition of a state license, because Colorado does not issue that state license. [10] Some owners and some municipalities like seeing it on a bid. It will not replace a Denver contractor card or a DORA plumbing license.
EPA WaterSense labels certain professional certification programs as a procurement preference, not a Colorado statute. It is useful on institutional bids. It is not a substitute for local paper.
I would spend money on the city card and insurance first. Add CIC or a WaterSense-labeled program later if a bid list keeps asking. Prepaid national courses that imply Colorado has a missing state irrigator exam are a waste of money.
IrrigatorPath publishes state paper paths so you can see which states actually charge an irrigator exam fee and which ones, like Colorado, do not.
What should you budget the first year besides the paper?
Paper is the small line. The truck, the trencher, fittings, wire, valves, a locate process, and idle winter months are the real budget.
I would start with a used truck that already tows, a rented or borrowed trencher until the calendar is full, and a parts account at one supplier who will take returns. A new mini excavator before booked work is a waste of money. So is a leased shop with a lobby. Work out of a yard and a phone.
Winter on the Front Range is real. If you have no snow-related or indoor work, cash has to last from the last punch list to spring start-up. Nobody has good public data on first-year irrigation contractor survival in Colorado. Price your off-season like it will be longer than you hope.
Software can stay cheap. A shared calendar and clean invoices beat a field platform you will not open. Put the next dollar into locating habits and as-built photos. Hitting a marked line is more expensive than any filing fee in this article.
Hire, and you add workers' compensation, unemployment, and wage accounts before the first paycheck. [6] Paying people as fake independents to dodge that stack is how you meet CDLE the hard way.
How does Colorado compare with other states on irrigation contractor cost?
Colorado is cheap on state irrigation paper and messy on local paper. States that sit a dedicated irrigator exam charge you for that exam and then still want local cards. Colorado skips the exam and leaves you with cities.
That is not automatically easier. A shop that works Denver, Aurora, and unincorporated Adams County can spend more time on three local packets than a shop in a single-board state spends on one exam. Compare the stack, not the slogan.
Keep a crew in the Intermountain West and you should read irrigation contractor cost in Idaho. Chase winter work south, and irrigation contractor cost in Arizona is the closer analog on climate, not on licensing. Illinois and Florida are useful only as a reminder that some states really do put irrigation on a state board. See irrigation contractor cost in Illinois before you assume every state works like Colorado.
Where do you confirm current fees before you pay anything?
Confirm with the board that collects the money. Do not confirm with a blog, including this one, for a dollar amount that can change.
Secretary of State filings: the current business document fee list. [4] Department of Revenue tax accounts: the register-a-business page. [5] DORA plumbing: the Plumbing Board applications page. [11] Chemigation: the Colorado Department of Agriculture chemigation program page. [7] Wells and pumps: the Division of Water Resources well construction service page. [8] Workers' compensation duties: CDLE's employer pages. [6] Denver work: Denver contractor and trades licensing. [12] Colorado Springs area work: Pikes Peak Regional Building Department contractor licensing. [13]
Print the fee screen the day you pay. Boards update PDFs. Your receipt is the number that mattered.
Sit an irrigator exam later in a state that actually has one, and the $149 State Irrigator Exam Kit is at /start. For Colorado, start with the boards named above. IrrigatorPath is an independent publisher, not a law firm and not a licensing service. No one here can approve your card or promise a date.
Frequently asked questions
Do you need a license for irrigation contractor in Colorado?
No statewide irrigation contractor license exists. You still need local contractor cards in most cities, a business entity if you form one, and a sales tax account if you make taxable sales. Plumbing, well construction, and chemigation are separate state credentials that apply only when the job actually includes that work. Confirm the local card with the city that will inspect you.
How much does irrigation contractor cost in Colorado?
There is no single state irrigation fee. A Colorado LLC filing has long been $50 online at the Secretary of State, and the state sales tax license is $0. City contractor licenses, DORA plumbing fees if you need them, chemigation permits, well licenses, and insurance are extra and must be confirmed with each board. Insurance will usually dwarf the filings.
How long does irrigation contractor take in Colorado?
Entity and tax filings can be same day or a few days once accepted. City contractor cards follow that city's calendar, which you confirm with Denver, PPRBD, or the town you will bill. A plumbing license, if you need one, is an experience plus exam path measured in years from zero. There is no statewide irrigation timer because there is no statewide irrigation license.
Does Colorado have a state irrigation contractor exam?
No. DORA does not sit an irrigation contractor exam. The state exams that sit next to this work are plumbing exams under the State Plumbing Board and the well contractor exams under the Division of Water Resources board. Voluntary credentials such as the Irrigation Association CIC are private. They are not a Colorado license.
Can I install irrigation in Colorado without a plumbing license?
Sometimes, if the job never becomes plumbing as Title 12, Article 155 defines it and the local building department allows a locally licensed contractor to do the laterals. The potable tap and the backflow assembly are the usual plumbing hooks. Ask the inspecting department before you bid the connection. Do not take internet permission over an inspector.
How much is a Colorado LLC for an irrigation business?
Articles of Organization have long been $50 to file online with the Colorado Secretary of State. Confirm the amount on the current SOS fee list the day you file. A trade name, periodic report, and registered agent setup are separate. The LLC is not a contractor license and does not let you pull city permits by itself.
Do I need workers' compensation as a solo irrigation contractor in Colorado?
If you have employees, Colorado generally requires workers' compensation coverage, with limited exceptions. A true solo owner-operator without employees is in a different spot than a crew. CDLE's Division of Workers' Compensation publishes the employer duties. Get a written quote before you hire, including relatives you pay.
What cities in Colorado require a contractor license for irrigation?
Most larger cities do. Denver and the Pikes Peak Regional Building Department (Colorado Springs area) publish contractor programs. Aurora, Fort Collins, and many counties do too. A card from one city does not travel automatically. Confirm with the building department for each place you will pull a permit or get inspected.
Is the Irrigation Association CIC required in Colorado?
No. CIC is a private national certification. Colorado does not require it because Colorado does not issue a state irrigation contractor license. Some owners like seeing it on a proposal. Buy it later if bids keep asking. It does not replace a city contractor license, a plumbing license, or a well license.
Do I need a chemigation permit to inject fertilizer in Colorado?
Yes, if you apply fertilizer or pesticide through an irrigation system. That is the Chemigation Act, Title 35, Article 11, administered by the Colorado Department of Agriculture. Confirm the current permit fee and equipment rules on CDA's chemigation page. Ordinary lawn irrigation that never injects chemicals is outside that permit.
What if I only do drip repairs and no potable tie-in?
You still need whatever local contractor license the city requires, plus ordinary business filings and insurance. You likely do not need a chemigation permit or a well license for a simple drip repair. You still need a legal backflow situation on any potable source. Ask the water provider and the building department if the repair stays on the irrigation side of an existing assembly.
How do I confirm current DORA plumbing fees?
Use the Colorado DORA State Plumbing Board applications page and the testing vendor bulletin linked from it. Do not use a fee you memorized last year. Application, exam, and renewal lines are separate. If your work is not plumbing, do not pay this stack just because a national checklist told you every irrigator needs a plumber card.
Does a well pump job need a different Colorado license?
Yes. Constructing a water well or installing pumping equipment is licensed under Title 37, Article 91 by the State Board of Examiners of Water Well Construction and Pump Installation Contractors at the Division of Water Resources. An irrigation contractor card from a city does not cover that work. Confirm classifications and current fees with that board.
Can I work statewide with one Denver contractor license?
No. Colorado has no statewide contractor passport for this trade. Denver's card covers Denver's program. Other cities and the Pikes Peak Regional Building Department run their own. If you chase jobs across the Front Range, budget a license packet for each market you will actually bill, and skip the cities you will not reach this year.
Sources
- Colorado General Assembly, Colorado Revised Statutes Title 12 (Professions and Occupations), Article 155 Plumbers: Colorado licenses residential, journeyman, and master plumbers under Title 12, Article 155 and requires a board license before engaging in that trade.
- Colorado General Assembly, Colorado Revised Statutes Title 37, Article 91 Water Well Construction and Pump Installation Contractors: Colorado separately licenses water well construction and pump installation contractors under Title 37, Article 91.
- Colorado General Assembly, Colorado Revised Statutes Title 35, Article 11 Chemigation Act: Colorado requires a chemigation permit to apply fertilizer or pesticide through an irrigation system.
- Colorado Department of Revenue, Register a business: Colorado issues business tax accounts including the sales tax license through the Department of Revenue registration process, and the sales tax license carries no state fee.
- Colorado Department of Labor and Employment, Division of Workers' Compensation employer information: Colorado generally requires employers to carry workers' compensation coverage for employees, with limited exceptions.
- Colorado Department of Agriculture, Chemigation program: The Colorado Department of Agriculture administers chemigation permits and posts the current program requirements.
- Colorado Division of Water Resources, Well construction and pump installation: The Division of Water Resources staffs the well construction and pump installation contractor board and publishes licensing information for that trade.
- Colorado State University Extension, Watering Established Lawns (fact sheet 7.199): CSU Extension publishes Colorado-specific lawn watering rates used by contractors when sizing and scheduling irrigation.
- Irrigation Association, Certification programs: The Irrigation Association CIC credential is a private national certification, not a Colorado state license.
- Colorado DORA State Plumbing Board, Applications: Current Colorado plumbing application and exam fees must be confirmed on the DORA Plumbing Board applications page.
- Pikes Peak Regional Building Department, Contractor licensing: The Pikes Peak Regional Building Department licenses contractors for Colorado Springs and participating jurisdictions.
- Colorado Secretary of State, 5 CCR 1002-11 Colorado Primary Drinking Water Regulations (Regulation 11): Regulation 11 requires public water systems to operate cross-connection control programs that drive backflow rules on irrigation taps.