Were onsite charges for assembling prefabricated radio-frequency rooms taxable?

Short answer Yes when the room remained movable and unattached: the contract sold tangible personal property and onsite kit assembly was taxable. Permanently affixed rooms could instead be construction contracts.
State
CA
Ruling
Annotation 190.0630
Tax type
Sales and Use Tax
Issued
1979-07-12
Issued by
California State Board of Equalization
Requested by
L--- M---, Inc.

Apply this to your situation

This page answers the general question as of 1979. Ask about yours and see what current California tax law says, with citations.

Currency note: this ruling is from 1979
Subsequent statutory amendments, regulation changes, court decisions, or later rulings may have changed the analysis. Treat this page as historical context, not current tax advice. Verify current law before relying on any specific rule, rate, or position mentioned here.
Disclaimer: This Decision and Recommendation concerns a 1974-1976 audit of prefabricated radio-frequency shielding rooms. The hearing officer signed it July 12, 1979, although continuation headers display July 26; the signed date is used here. The result depended on whether each room was permanently attached and on the onsite work being assembly of kit parts. Modern modular systems require their own attachment, intent, fabrication, and contract analysis.
About this page: The plain-English summary, reader guidance, and Q&A below were written by Ezel based on the official state tax ruling. The original ruling (linked on this page as a PDF) is the authoritative source for any reliance.
View original ruling (PDF)

Plain-English summary

Permanently affixed modular shielding rooms could be improvements to realty under construction contracts. Movable rooms not attached to the building remained tangible personal property.

For the unattached rooms at issue, assembling prefabricated kit components onsite was taxable assembly labor, not nontaxable installation. The worker's construction classification and the seller's contractor license did not change the nature of the work.

The hearing officer also rejected comparisons to transactions structured differently. Tax depended on how this seller performed the transaction, not on whether a customer might assemble the kit itself or hire someone else.

Common questions

What separated a construction contract from a property sale?

Permanent attachment to realty and intent to make a permanent addition.

Was onsite kit assembly installation labor?

No. For movable, unattached rooms it was taxable assembly producing tangible personal property.

Did holding a contractor license make the labor nontaxable?

No.

Citations and references

  • California Revenue and Taxation Code section 6011(c)(3) — installation-labor exclusion discussed by the decision
  • California Revenue and Taxation Code section 6006(b) and California Code of Regulations, title 18, section 1526 — third-party fabrication or assembly treatment
  • California Code of Regulations, title 18, section 1521 — construction-contract and realty-attachment framework
  • Business Taxes Law Guide Annotations 435.0020, 435.0040, and 435.0060 — assembly authorities cited by the hearing officer
  • Freeman v. Commissioner, 303 F.2d 580 — transaction-as-performed principle cited in the decision

Source

Original ruling text

STATE OF CALIFORNIA
BOARD OF EQUALIZATION

In the Matter of the Petition
for Redetermination of State
and Local Sales and Use Taxes
L--- M---, INC.

)
)
)
)

190.0630

DECISION AND RECOMMENDATION
OF HEARING OFFICER

)

Petitioner

)
)
)

Account No. SS -- XX XXXXXX

The above-referenced matter came on regularly for hearing on June 14, 1979, in Los Angeles, California. H. L. Cohen, Hearing Officer.

Appearing for Petitioner:

Appearing for the Sales and
Use Tax Department:

Mr. F--- N---, President

Mr. Arthur Brown, Principal Auditor
West Los Angeles District

PROTEST
Petitioner protests the assertion of tax on assembly charges. Tax was asserted on the basis of an audit covering the period from January 1974 through December 31, 1976. A determination was issued on August 15, 1978. The amount upon which the protested tax is based in $27,991. CONTENTION Petitioner contends that the charges upon which tax was asserted are charges for installation which are not subject to tax. SUMMARY 1. Petitioner is a corporation engaged in manufacturing and selling shielded rooms and enclosures. It commenced in business May 1, 1967. There has been no prior audit.

L--- M---, Inc.
SS -- XX XXXXXX

-4-

July 26, 1979
190.0630

2.
Petitioner builds and sells prefabricated, modular enclosures or rooms which provide shielding from radio frequency radiation. The rooms are sold in kit form unassembled or are assembled on-site by petitioner. A separate charge is made for installation. The assembled rooms may or may not be attached to the floor of the buildings in which they are installed. The auditor regarded the assembled rooms which were not attached to the building as tangible personal property, and the charges for onsite work as taxable assembly labor. Petitioner contends that all manufacturing is done in the factory and that the onsite workers are construction workers who do no fabrication. Petitioner holds a construction contractor license. Half of the purchasers assemble the kits themselves. Petitioner also contends that manufacturers of similar items, such as ovens, humidity and salt spray test rooms, commercial refrigerators, paint booths and guard houses are not taxed on installation labor. Petitioner states that large units are regarded by the Board as improvements to realty, therefore the small units which are sold should be regarded the same. 3. Petitioner argues that it is unfair to tax his charges when no tax applies if the buyer assembles the property or contracts with a third party to assemble the property. ANALYSIS AND CONCLUSIONS 1. Sales and Use Tax Regulation 1521 provides that construction contractors are consumers of materials used in the performance of contracts for making improvements to realty. The contractor must pay sales tax reimbursement or use tax on the cost of the materials. A key element in deciding whether a contract is a construction contract or a contract for the sale of tangible personal property is whether the item which is the subject of the contract is attached to realty in a permanent manner. If the item is movable and not attached to realty, the contract is one for the sale of tangible personal property. The distinction made by the auditor in this respect is correct. 2. Section 6011(c)(3) provides that charges for installing property sold are not to be included in the sales price which is subject to tax. The Board has historically distinguished between exempt installation labor and taxable assembly labor. Installation does not include the assembly of prefabricated components. See Business Taxes Law Guide, Annotations 435.0020, July 19, 1950 (Assembly of Steel Lockers and Shelving); 435.0040, July 25, 1967 (Assembly of Knocked-Down Furniture); and 435.0060, March 15, 1966 (Assembly of Shelving). Petitioner’s work at the customer’s site consists of the assembling of parts which is a step in a series of operations resulting in the production of tangible personal property. Charges made for this operation are not charges for installation; they are charges for assembly, thus subject to tax. The classification of the workers performing the work is not determinative of whether the work is assembly or installation, nor is the fact that petitioner holds a contractor’s license have any special significance. 3. While it is true that no tax applies to the assembly labor if a customer does this work itself, this is not a basis for not taxing petitioner’s charges. The application of tax is based on

L--- M---, Inc.
SS -- XX XXXXXX

-4-

July 26, 1979
190.0630

how the transaction is carried out, not on how it could be carried out. See Freeman v. Commissioner, 303 F.2d 580. If a customer hires a third party to assemble the property, charges by the third party are subject to tax. See Section 6006(b) and Sales and Use Tax Regulation 1526. RECOMMENDATION Redetermine without adjustment.

________
H. L. COHEN, HEARING OFFICER

July 12, 1979
________
Date

Reviewed for Audit:

________
Principal Tax Auditor

________
Date

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