Egress Requirements in Portland:
Basements, Bedrooms, and What the Code Actually Says

Why Egress Exists, and Why It Is Taken Seriously

Emergency egress requirements exist because fires kill people who cannot get out. The specific dimensions of an egress window, 5.7 square feet of clear opening, 24 inches minimum height, 20 inches minimum width, are not arbitrary. According to Portland’s own published documentation, these dimensions are based on the space needed for a fully-equipped firefighter wearing oxygen tanks to enter a room from outside. The same opening that lets a firefighter in lets an occupant out.

A bedroom in a basement with no compliant egress window has one way in and one way out: the door through the home to the stairs and to the exterior. If fire is in the home between that bedroom and the exit, the occupant is trapped. That is the scenario egress requirements are designed to prevent, and it is why inspectors document undersized or blocked egress as a safety finding rather than a maintenance item.

Portland and SW Washington homes, especially the older stock from the 1940s through the 1970s, frequently have basements with small windows that were not designed as sleeping rooms but are now being used as bedrooms. Understanding the specific requirements, what the historical exceptions allow, and what triggers an upgrade requirement matters for anyone buying, selling, or finishing space in an older home in this market.

Current Requirements, Oregon Residential Specialty Code R310

Oregon has adopted the International Residential Code with state-specific amendments. The egress requirements for residential properties are found in Oregon Residential Specialty Code (ORSC) Section R310, which Portland implements and enforces through Portland Permitting & Development (formerly the Bureau of Development Services). These are the current standards that apply to new construction, new sleeping rooms, and conversions of non-habitable space to habitable space.

Source: ORSC R310 & Portland.gov

Current Egress Window Requirements, Portland and Oregon (ORSC R310)

Minimum net clear opening

5.7 sq ft (5.0 sq ft for grade floor or below-grade where window well bottom is not more than 44″ below grade)

Minimum clear opening height

24 inches

Minimum clear opening width

20 inches

Maximum sill height

44 inches above finished floor

Operation

Must open from inside without keys, tools, or special knowledge

Egress path

Must open directly to a public way, yard, or court that opens to a public way, minimum 36″ unobstructed path to public way

Fall prevention devices

Permitted if compliant with ASTM F2090; must not exceed 70″ above floor

Sprinkler exception

Basement sleeping rooms in NFPA 13D-sprinklered homes may omit egress windows if two compliant means of egress per R311 are provided

Where Egress Is Required, and Where It Is Not

The ORSC and Portland’s implementing standards require at least one egress opening in the following locations:

• Every basement, regardless of whether a sleeping room is present
• Every sleeping room in any basement, each individual bedroom requires its own compliant egress opening; a single window elsewhere in the basement does not satisfy the per-room requirement
• Every sleeping room above grade, not just basements; every bedroom in the home requires compliant egress
• Habitable attics, where an attic has been converted to finished living space
• New basement additions, where a new basement is added to an existing home

Exceptions where egress is not required:

• Basements used only to house mechanical equipment, not exceeding 200 square feet of total floor area
• Storm shelters
• Existing basements undergoing alterations or repairs that do not involve creating new sleeping rooms, routine renovation of an existing basement does not trigger a new egress requirement unless a bedroom is being added
• A new basement connected to and accessible from an existing basement that already has a compliant egress opening

Window Wells, What Portland Requires

Most basement egress windows are below grade, the exterior ground level is above the bottom of the window. That means the window must have a window well: an excavated area on the exterior that creates the clear space the egress opening needs to function. An egress window installed below grade without an adequate window well does not comply, even if the window itself meets all the dimensional requirements, because the window cannot be used for exit or rescue if there is no space to climb out into.

Source: Portland.gov, Adding Windows or Replacing Windows

Window Well Requirements, Portland

Minimum clear space in front of window: 36″ x 36″

Window must open fully within well: Required

Ladder required when: Well bottom is more than 44″ below top of well

Maximum ladder rung spacing: 18″ center-to-center

Ladder projection into clear space: Up to 6″ permitted, cannot restrict window opening

Window well construction materials: Corrugated metal, concrete, concrete block, or pressure-treated lumber

The window well must be large enough that the window can open completely within it. If a window swings outward and the well is too narrow for the sash to open fully, the opening is obstructed, and an obstructed egress opening is a non-compliant egress opening. The 36-by-36-inch clear space requirement applies to the open area in front of the window, not just the excavated footprint. Those are not the same dimension if the window has any inward projection or if the window well narrows toward the top.

The ladder requirement for deep wells (bottom more than 44 inches below grade) is a practical safety provision. A person exiting through an egress window into a deep well needs a means to climb out of the well itself. The ladder must be permanently attached, not a removable ladder stored inside, and the rung spacing ensures that it is usable under emergency conditions.

Alternatives to Windows, Doors and Skylights

Windows are the most common form of egress opening in Portland basements, but they are not the only option. Portland’s Building Code Guide 96-12 recognizes two alternatives that are worth understanding, particularly for buyers looking at older basements where window installation would be difficult or expensive.

Exterior Doors as Egress

An exterior door can satisfy the egress requirement in a Portland basement when it meets these specific criteria per Building Code Guide 96-12:

• Minimum height of 6 feet 2 inches
• Minimum width of 30 inches
• The door threshold must be located at least one step below the level of the floor above
• No limit on the bottom of the clear opening height (the 44-inch sill height maximum does not apply to doors)

This is a meaningful alternative for walkout basements or basements with a door opening to a stairwell leading to grade. A walkout basement door that is 6 feet 2 inches tall and 30 inches wide, with a threshold at least one step below the first floor level, satisfies the egress requirement for the basement space it serves. It does not satisfy the per-room requirement for individual sleeping rooms that do not have direct access to that door, each bedroom still needs its own egress opening unless the door is directly accessible from within that specific room.

Skylights as Egress

A skylight can serve as an egress opening in a Portland basement where it meets the standard dimensional requirements: 5.7 square feet minimum clear opening, 24-inch minimum height, 20-inch minimum width, sill height not more than 44 inches above the floor. One important difference from windows: a permanently installed step below the skylight cannot be used to achieve the 44-inch maximum sill height. The step accommodation that applies to windows does not apply to skylights. The skylight itself must be within 44 inches of the floor without a step assist.

Existing Homes and BCG 96-12, Portland’s Alternative Standards

This is the section that most buyers, sellers, and even some contractors do not fully understand. Portland has a specific Building Code Guide, BCG 96-12, titled “Habitable Spaces”, that establishes alternative standards for converting non-habitable space to habitable space in existing one and two-family dwellings. These alternatives allow some flexibility that the base ORSC code does not, specifically for older homes where strict code compliance would make conversion impractical or impossible.

Source: Portland Building Code Guide 96-12, portland.gov

BCG 96-12 applies when:

• Non-habitable space is being converted to habitable space (for example, finishing an unfinished basement)
• The habitable use of a space is changing within an existing one or two-family dwelling
• The structure was constructed with a permit

BCG 96-12 does not apply to new construction, additions, the creation of ADUs, or duplexes.

The Step Accommodation

One of the most practically useful alternatives in BCG 96-12 is the step accommodation for existing windows. When an existing window is used for emergency egress in a converted basement, the sill height maximum is still 44 inches, but a single permanently installed step can be used to effectively lower the sill height to 44 inches. The step must meet all of these conditions:

• No higher than 12 inches and not less than 12 inches deep
• Extends the full width of the window
• Provides a minimum of 6 feet of clearance from the top of the step to the ceiling

This is meaningful for basements where the existing window sill is 50 or 52 inches above the floor, a condition that would otherwise require either a new window installation or a window well modification. A correctly constructed fixed step brings the effective sill height into compliance without touching the window or the exterior.

What BCG 96-12 Cannot Do

The alternative standards in BCG 96-12 only apply to alterations using existing elements in existing structures. They cannot be used to justify installing a new window that is smaller than current code requires. A new egress window installed as part of a basement conversion must meet current ORSC dimensions, 5.7 square feet (or 5.0 for eligible below-grade applications), 24-inch height, 20-inch width, 44-inch sill maximum. The step accommodation and existing-window flexibility only apply to using what is already there, not to new installations.

Historical Code Requirements, What Older Bedrooms Were Permitted Under

This is where Portland’s approach gets more layered than most buyers expect. Portland explicitly recognizes that window requirements for sleeping rooms have changed significantly over time, and that an existing sleeping room window may legally remain in place if the room was legally permitted as a bedroom under the code requirements in effect when it was originally permitted.

This is documented directly on Portland.gov’s window requirements page: “Existing sleeping room windows may remain if the room was legally permitted as a bedroom previously and if the windows meet the historical code requirements in effect at the time that the bedroom was originally permitted.”

Portland also publishes the specific historical requirements on its short-term rental permits page, which provides the most detailed historical breakdown available from the City:

Source: Portland.gov, Short Term Rental Permits / Historical Code Requirements

Era

Sleeping Room Window Requirements

Pre-1956

No standardized minimum egress window dimension on record for this period. Rooms permitted as sleeping rooms under earlier codes may have had no specific window size requirement. Consult permit records and Portland’s historical code documentation.

1956

All rooms used for sleeping shall have windows with a total area of 12 square feet or one-eighth of the floor area of the room, whichever is greater. At least half of the required window area must be openable. Fixed windows acceptable if mechanical ventilation producing one air change per 5 minutes is provided. No minimum sill height specified.

1973

Sleeping rooms must have a window with a net clear openable area of not less than 5 square feet. No dimensions less than 22 inches in any direction. Sill height may not be more than 48 inches above the floor.

1976

Sleeping rooms must have a window with a net clear opening of not less than 5.7 square feet. Minimum net clear opening height: 24 inches. No maximum sill height specified in this version.

1995 – present

Net clear opening not less than 5.7 square feet. Minimum height: 22 inches (later updated to 24 inches). Minimum width: 20 inches. Sill height not more than 44 inches above the floor. Current standards align with ORSC R310.

What this means in practice: a bedroom in a Portland home built in 1958 with a window that provides 12 square feet of total glass area (half openable) and no specific sill height may be a legally permitted bedroom that fully complied with the code at the time it was permitted. It does not meet current 5.7 square foot egress standards. But if it was permitted as a bedroom under the 1956 code requirements, it does not automatically require an upgrade simply because the home is being sold.

The operative question, and this is important, is whether there is a permit record establishing the room as a legal bedroom. If permit records confirm the room was originally constructed or converted as a bedroom under historical code, the historical standard applies. If there is no permit record, or if the room was never permitted as a sleeping room, the analysis is different.

What This Looks Like in Portland Homes

The egress finding on inspection reports in Portland and SW Washington takes several distinct forms. Understanding which form you are looking at determines what the finding actually means.

Older Home, Windows Too Small, Room Never Permitted as a Bedroom

The most common scenario in Portland’s older housing stock. A basement room has been finished and is being used as a bedroom. The windows are small, typical of basement windows from the 1950s or 1960s, often 16 by 24 inches or similar. There is no permit record for the space as a bedroom. The current owner may have lived there for years, or the finish may be recent.

In this case, current egress standards apply because the room was not legally permitted as a bedroom. The windows do not meet current egress dimensions, and the safety concern is real.

The path forward depends on what the buyer intends to do with the space. If the room will be used as a bedroom, egress compliance is needed, either a new compliant egress window with a window well, or a compliant exterior door if the configuration allows. If the space will not be used as a sleeping room, the non-compliant window is still worth noting but the urgency is different.

Older Home, Windows Too Small, Room Permitted as a Bedroom Under Historical Code

A basement bedroom in a 1955 home that was permitted and inspected as a bedroom at original construction. The windows meet the 1956 code (12 square feet total, half openable) but not current standards. There is a permit record confirming the original bedroom designation.

In this case, Portland’s historical code recognition means the existing windows may legally remain for a continuing bedroom use. The inspection report may still note that windows do not meet current egress standards, because they do not, but the legal status of the space as a bedroom is established by the original permit.

This distinction matters for buyers who want to understand whether a finding requires correction or simply reflects a condition of the building’s age.

Basement with a Single Egress Window but Multiple Bedrooms

One compliant egress window exists in a basement family room or common area, but the basement also has two bedrooms, and neither bedroom has its own egress opening. This is a common layout in Portland homes where a basement was converted incrementally over years.

One egress window in the common area does not satisfy the per-room requirement. Each sleeping room must have its own compliant egress opening. Both bedrooms are non-compliant regardless of the window in the hallway or common area.

New Bedroom Created in an Existing Basement

An owner finishes a basement room as a new bedroom, new framing, new drywall, new closet, without a permit. The window does not comply with current standards. This scenario requires current code compliance. BCG 96-12’s alternative standards for existing elements do not apply to newly created sleeping rooms, even in an existing basement. A new bedroom requires a new compliant egress opening.

What Correction Actually Looks Like, and What It Costs

When egress is non-compliant in a basement that will continue to be used as a sleeping room, correction requires either installing a compliant egress window with a window well or installing a compliant exterior door. The right approach depends on the specific layout, the exterior grade conditions, and the structural configuration of the foundation wall.

New Egress Window Installation

Installing a new egress window in a basement foundation wall requires cutting an opening through the concrete or masonry foundation, installing appropriate structural support (a lintel above the opening), installing the window unit, and excavating and constructing a window well on the exterior. In Portland and SW Washington, this is permitted work, a building permit is required for adding a new window opening in the foundation.

The typical process involves a concrete cutting contractor for the foundation opening and a window installer for the unit and well. Some window contractors handle both scopes. The exterior window well may be a pre-manufactured corrugated metal well (for shallower installations) or a custom-constructed concrete, concrete block, or pressure-treated lumber well (for deeper or larger installations).

Typical cost in the Portland metro and SW Washington: $2,500 to $6,000 for a single egress window installation with window well, depending on the foundation wall thickness, the depth of excavation required, and whether the window well needs a ladder. This is general guidance, actual costs vary based on site-specific conditions. A written estimate from a licensed contractor is the only reliable number for a specific property.

Alternative: Compliant Exterior Door

Where a basement can accommodate a walkout door or a bulkhead-style door to an exterior stairwell, this can satisfy the egress requirement at lower cost than a window installation if the rough opening already exists or can be created more easily than a window well. The door must be 6 feet 2 inches high, 30 inches wide, and the threshold must be at least one step below the first floor level.

Permits Required

Any new window opening in a foundation wall requires a building permit from Portland Permitting & Development. A permit for an interior bedroom conversion also triggers egress review. Working without a permit on egress-related work can create issues at a future sale and with insurance claims. Unpermitted work does not show up in the permit record, and the condition of the space may raise questions at a future inspection.

Egress Above Grade, Not Just a Basement Issue

While the focus in Portland’s older housing stock tends to be on basements, egress requirements apply to every sleeping room in the home, including those above grade. A second-floor bedroom with a window that does not meet the dimensional requirements for egress is non-compliant, regardless of how many other exits the home has.

Above-grade egress non-compliance is less common because most above-grade windows are adequately sized for egress by default, double-hung and casement windows in standard residential sizes typically meet or approach the requirements. What trips up above-grade sleeping rooms are non-standard situations: very old homes with small double-hung windows that were not updated, rooms with high sills due to architectural features, rooms with windows that cannot be opened from the inside without tools, and rooms where windows have been painted or swollen shut.

Habitable attic bedrooms present their own egress considerations. Skylights may serve as egress openings in attic sleeping rooms when they meet the dimensional requirements. Dormer windows that open to the exterior with adequate dimensions also work. The sill height restriction, 44 inches maximum above the finished floor, is the most common compliance issue in attic bedrooms where the floor slopes with the roof line and windows are positioned high on the wall.

Egress in SW Washington, What Buyers There Need to Know

SW Washington, Vancouver, Camas, Washougal, Ridgefield, Battle Ground, follows the Washington State Building Code, which has adopted the 2021 International Residential Code. The egress window requirements are substantively the same as Oregon’s: 5.7 square feet minimum net clear opening, 24-inch minimum height, 20-inch minimum width, 44-inch maximum sill height. Window well requirements are also aligned: 36 by 36 inch minimum clear area, ladder required when well depth exceeds 44 inches.

The primary difference in SW Washington is that permit history and historical code records are maintained by Clark County or by the City of Vancouver (depending on jurisdiction) rather than by Portland Permitting & Development. Buyers looking at older homes in SW Washington should verify permit records through the appropriate jurisdiction, Clark County or the relevant city, rather than through Portland’s permit lookup system.