# Minn. R. 1309.0305: SECTION R305, CEILING HEIGHT > Minnesota · Regulations · In force URL: https://www.frixlaw.com/law-library/statutes/STATE_MN_ADR_1309_0305 ## Section - **Citation:** Minn. R. 1309.0305 - **Heading:** SECTION R305, CEILING HEIGHT - **Jurisdiction:** Minnesota - **Kind:** Regulations - **Status:** In force - **Text as of:** August 14, 2026 - **Source:** Compiled text - **Location:** Minnesota Administrative Rules / DEPARTMENT OF LABOR AND INDUSTRY / Chapter 1309 / Part 1309.0305 ## Text IRC section R305 is amended to read as follows: R305.1 Minimum height, new buildings. Habitable space, hallways, bathrooms, toilet rooms, laundry rooms, and portions of basements containing these spaces shall have a ceiling height of not less than 7 feet (2134 mm). The required height shall be measured from the finish floor to the lowest projection from the ceiling. Exceptions: 1. For rooms with sloped ceilings, at least 50 percent of the required floor area of the room shall have a ceiling height of at least 7 feet (2134 mm) and no portion of the required floor area may have a ceiling height of less than 5 feet (1524 mm). 2. Bathrooms shall have a minimum ceiling height of 6 feet 8 inches (2032 mm) at the center of the front clearance area for water closets, bidets, or sinks. The ceiling height above fixtures shall be such that the fixture is capable of being used for its intended purpose. A shower or tub equipped with a showerhead shall have a minimum ceiling height of 6 feet 8 inches (2032 mm) above a minimum area 30 inches (762 mm) by 30 inches (762 mm) at the showerhead. R305.1.1 Basements, new buildings. Portions of basements that do not contain habitable space, hallways, bathrooms, toilet rooms, and laundry rooms shall have a ceiling height of not less than 6 feet 8 inches (2032 mm). Exception: Beams, girders, ducts, or other obstructions may project to within 6 feet 4 inches (1931 mm) of the finished floor. R305.2 Alterations to existing building basements. Alterations to portions of existing basements shall comply with the provisions of this section. R305.2.1 Minimum ceiling height, existing buildings. Alterations to existing basements or portions thereof shall have a ceiling height of not less than 6 feet 4 inches (1931 mm), including beams, girders, ducts, or other obstructions. R305.2.1.1 Bathroom plumbing fixture clearance. Bathrooms shall have a minimum ceiling height of 6 feet 4 inches (1931 mm) at the center of the front clearance area for water closets, bidets, or sinks isting buildings. Alterations to existing basements or portions thereof shall have a ceiling height of not less than 6 feet 4 inches (1931 mm), including beams, girders, ducts, or other obstructions. R305.2.1.1 Bathroom plumbing fixture clearance. Bathrooms shall have a minimum ceiling height of 6 feet 4 inches (1931 mm) at the center of the front clearance area for water closets, bidets, or sinks. A shower or tub equipped with a showerhead shall have a minimum ceiling height of 6 feet 4 inches (1931 mm) above a minimum area 30 inches (762 mm) by 30 inches (762 mm) at the wall where the showerhead is placed. The ceiling may have slopes or soffits that do not infringe on the height required for the plumbing fixture. R305.2.2 Minimum stairway headroom, existing buildings. Alterations to existing basement stairways shall have a minimum headroom in all parts of the stairway not less than 6 feet 4 inches (1931 mm) measured vertically from the sloped line adjoining the tread nosing or from the floor surface of the landing or platform on that portion of the stairway. Exception: Where the nosings of treads at the side of a flight extend under the edge of a floor opening through which the stair passes, the floor opening shall be allowed to project horizontally into the required headroom a maximum of 4-3/4 inches (121 mm). ## Nearby sections - [Minn. R. 1309.0010 ADOPTION OF INTERNATIONAL RESIDENTIAL CODE (IRC) BY REFERENCE](https://www.frixlaw.com/law-library/statutes/STATE_MN_ADR_1309_0010.md) - [Minn. R. 1309.0020 REFERENCES TO OTHER ICC CODES](https://www.frixlaw.com/law-library/statutes/STATE_MN_ADR_1309_0020.md) - [Minn. R. 1309.0030 ADMINISTRATIVE PROCEDURE CRITERIA](https://www.frixlaw.com/law-library/statutes/STATE_MN_ADR_1309_0030.md) - [Minn. R. 1309.0100 CHAPTER 1, ADMINISTRATION](https://www.frixlaw.com/law-library/statutes/STATE_MN_ADR_1309_0100.md) - [Minn. R. 1309.0201 SECTION R201, GENERAL](https://www.frixlaw.com/law-library/statutes/STATE_MN_ADR_1309_0201.md) - [Minn. R. 1309.0202 SECTION R202, DEFINITIONS](https://www.frixlaw.com/law-library/statutes/STATE_MN_ADR_1309_0202.md) - [Minn. R. 1309.0300 SECTION R300, CLASSIFICATION](https://www.frixlaw.com/law-library/statutes/STATE_MN_ADR_1309_0300.md) - [Minn. R. 1309.0302 SECTION R302, FIRE-RESISTANT CONSTRUCTION](https://www.frixlaw.com/law-library/statutes/STATE_MN_ADR_1309_0302.md) - [Minn. R. 1309.0303 SECTION R303, LIGHT, VENTILATION, AND HEATING](https://www.frixlaw.com/law-library/statutes/STATE_MN_ADR_1309_0303.md) - [Minn. R. 1309.0305 SECTION R305, CEILING HEIGHT](https://www.frixlaw.com/law-library/statutes/STATE_MN_ADR_1309_0305.md) - [Minn. R. 1309.0307 SECTION R307, TOILET, BATH, AND SHOWER SPACES](https://www.frixlaw.com/law-library/statutes/STATE_MN_ADR_1309_0307.md) - [Minn. R. 1309.0309 SECTION R309, GARAGES AND CARPORTS](https://www.frixlaw.com/law-library/statutes/STATE_MN_ADR_1309_0309.md) - [Minn. R. 1309.0310 SECTION R310, EMERGENCY ESCAPE AND RESCUE OPENINGS](https://www.frixlaw.com/law-library/statutes/STATE_MN_ADR_1309_0310.md) - [Minn. R. 1309.0311 SECTION R311, MEANS OF EGRESS](https://www.frixlaw.com/law-library/statutes/STATE_MN_ADR_1309_0311.md) --- Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/STATE_MN_ADR_1309_0305. Check the current official text before relying on it. Not legal advice.