NAICS Code for Gutter Installation: Classification, Uses, and Filing Tips

The primary NAICS code for gutter installation is 238170, Siding Contractors. In the U.S. Census Bureau’s North American Industry Classification System, this industry includes contractors that install gutters and downspouts as part of exterior building work. A business that mainly installs gutters typically uses 238170 when selecting a code for business registration, tax forms, insurance applications, or government contracting profiles. The right classification can depend on the company’s primary activity, so businesses that also do substantial roofing or other construction work should check the official definitions and the instructions for each form.

Meta description: Find the NAICS code for gutter installation, learn why 238170 applies, and see how to choose, verify, and use the code on business and government forms.

What Is the NAICS Code for Gutter Installation?

The standard six-digit NAICS code associated with gutter installation is 238170 — Siding Contractors. The title may seem unexpected: gutter installers do not necessarily install siding. NAICS categories group businesses by their economic activity, and the Census Bureau’s industry definition for 238170 covers certain exterior-building installation work beyond siding alone, including gutter and downspout installation.

NAICS stands for the North American Industry Classification System. The United States, Canada, and Mexico use this framework to classify business establishments by the type of work they primarily perform. The code has six digits, with broader categories represented by the first two, three, four, or five digits.

For a company focused on installing, replacing, or repairing gutters and downspouts, 238170 is generally the most relevant starting point. The classification is not a license, certification, or measure of a contractor’s qualifications. It is an industry code used for statistics and administrative purposes.

What Work Does NAICS 238170 Cover?

NAICS 238170 covers establishments primarily engaged in installing siding, including related exterior work identified in the federal industry description. The category includes gutter and downspout installation, which is why it is commonly used by dedicated gutter contractors.

Typical services that may fit a gutter-installation business include:

• Installing seamless or sectional gutters on residential and commercial buildings
• Replacing existing gutters and downspouts
• Repairing, realigning, or reattaching gutter systems
• Installing downspout extensions and related drainage components
• Installing gutter guards or covers as part of a gutter service
• Providing gutter work alongside siding, soffit, or fascia installation

The code describes an establishment’s primary business activity, not every task it performs. A contractor may perform several services, but the appropriate NAICS code usually reflects the work that best represents the establishment’s principal activity under the rules of the form or program requesting it.

When Another NAICS Code May Be More Appropriate

Gutter work often overlaps with roofing and other exterior construction. The fact that a business installs gutters does not automatically make 238170 the best code in every situation. A contractor whose main business is roofing may need a roofing classification instead, while a general contractor may be classified according to broader construction activity or the particular project scope.

These examples are a guide, not a substitute for reviewing the official code descriptions. If a business installs gutters only as a small part of a roofing operation, 238160 may better describe its main activity. If gutter installation is its core service, 238170 is generally the stronger match. If it conducts multiple distinct lines of business, a form may allow a primary code and additional codes.

How to Choose the Right Code for a Gutter Business

1. List the business’s services. Include gutter installation, repairs, roofing, siding, fascia, soffit, and any other construction work.
2. Identify the principal activity. Consider which service best describes the business overall. Depending on the form, relevant factors may include revenue, receipts, or the nature of the work performed.
3. Check the official NAICS definition. Search the Census Bureau’s NAICS resources for code 238170 and review the included activities and exclusions.
4. Read the form’s instructions. A federal agency, insurer, lender, or tax form may specify how it expects businesses to classify an activity.
5. Use the same classification consistently. Keep a record of the code selected and the reasoning behind it, and update it if the business’s main services change.

There is no universal rule requiring every organization to use the same code for every purpose. A form may ask for one primary NAICS code, permit several codes, or apply its own classification method. The applicant remains responsible for answering that specific form accurately.

Where Gutter Contractors Use a NAICS Code

Business registration and tax records

Some state or local registration systems request a business activity code, and certain tax documents ask for a business classification. When a form requests a NAICS code, a gutter installer can generally consider 238170, then confirm that the description matches its primary activity and the form’s instructions. A NAICS code does not determine a company’s tax treatment by itself.

Government contracting and vendor registration

Federal contracting systems use NAICS codes to describe the industries associated with solicitations and businesses. A gutter contractor registering as a vendor may list codes relevant to its actual services, including 238170 when appropriate. A code does not guarantee eligibility for a contract; each solicitation includes its own scope, qualifications, and eligibility requirements.

For certain federal contracting programs, NAICS codes are also connected to Small Business Administration size standards. A size standard is a separate determination based on the applicable SBA rule and the firm’s circumstances. Businesses should check the current SBA table for the code and program rather than assume that a NAICS code alone establishes small-business status.

Insurance, lending, and market research

Insurers and lenders may request an industry code to help categorize a company. The code can help describe the business, but it does not replace an accurate description of the work, payroll, subcontracting, or operational risks requested in an application. For market research, NAICS classifications help organize industry data, although a broad category may include businesses that do not provide exactly the same services.

NAICS 238170 Compared With Similar Codes

The most common source of confusion is the difference between gutter installation and roofing. Both trades work on the building envelope, and gutter work may be sold by roofing companies. The classification should follow the business’s main activity rather than the fact that a service takes place near or on a roof.

• 238170 — Siding Contractors: A common fit for businesses primarily installing gutters, downspouts, siding, or related exterior components covered by the industry definition.
• 238160 — Roofing Contractors: A code to review when roof installation and repair are the company’s principal work.
• Other construction codes: These may apply to businesses whose main activity is broader construction or another specialized trade. The official NAICS descriptions and the requesting organization’s rules should guide the choice.

A business should not choose a code solely because it appears more favorable for a bid, insurance quote, or application. Inaccurate classification can create confusion, lead to inconsistent records, or require a correction later.

Does the NAICS Code Change by State or Business Type?

The federal NAICS classification is a standardized system, but how a code is requested or used can differ across state and local systems, agencies, and private organizations. Some forms may use a different industry taxonomy, require a more detailed business description, or ask for a principal activity using their own list.

The business’s legal structure—such as a sole proprietorship, partnership, or corporation—does not by itself determine its NAICS code. The code describes the business activity, not its ownership form. A company may also have more than one code if it operates multiple lines of business and a registration or program allows additional classifications.

How to Verify NAICS Code 238170

The U.S. Census Bureau’s NAICS website is the primary source for official industry titles and definitions. Search for “238170” in the relevant NAICS edition and read the full description, including notes about included and excluded activities. Because NAICS is periodically updated, the applicable edition can depend on the form or data source.

The SBA’s table of size standards is the appropriate place to check whether a particular small-business size standard applies to a code for federal contracting purposes. The code and the size standard answer different questions: the NAICS code identifies the industry, while the size standard determines whether a firm meets a program’s size threshold under applicable rules.

When a form’s instructions conflict with a general directory or a third-party website, the instructions from the organization requesting the information should be reviewed first. For complex cases—especially businesses with substantial roofing, siding, and gutter operations—an accountant, business adviser, or contracting specialist can help interpret the relevant requirements.

Common Questions About the Gutter Installation NAICS Code

Is 238170 the NAICS code for gutter installation?

Generally, yes. NAICS 238170, Siding Contractors, is the standard code to review for a business primarily engaged in gutter and downspout installation. Confirm the official description and the instructions for the specific filing or application.

Is gutter installation classified as roofing?

Not automatically. A dedicated gutter-installation business generally looks to 238170. A company whose primary activity is roofing may use 238160, depending on its operations and the requirements of the form requesting a code.

Can a gutter contractor use more than one NAICS code?

Some registration and contracting systems allow businesses to list multiple codes. The company should include only codes that accurately represent services it provides and follow the system’s instructions for selecting a primary code.

Does 238170 provide a contractor license?

No. NAICS is an industry classification system, not a license or credential. State and local governments may have separate licensing, registration, insurance, or permit requirements for construction work.

Key Takeaway

For most businesses focused on gutter and downspout installation, the relevant classification is NAICS 238170 — Siding Contractors. The title is broader than the service, but the industry definition includes gutter installation. Contractors that primarily perform roofing or other construction work should compare their main activity with the official code descriptions and follow the rules of the agency or organization requesting the information.