# Room & Space Standards

## Residential Room Sizes

### Bedrooms
| Room Type | Minimum Size | Recommended | Notes |
|-----------|--------------|-------------|-------|
| Master Bedroom | 120 SF | 180-250 SF | Walk-in closet adds 25-50 SF |
| Secondary Bedroom | 100 SF | 120-150 SF | |
| Guest Bedroom | 100 SF | 120-150 SF | |
| Child's Bedroom | 80 SF | 100-120 SF | Code minimum 70 SF |

### Bathrooms
| Room Type | Minimum Size | Recommended | Notes |
|-----------|--------------|-------------|-------|
| Full Bath | 40 SF | 50-75 SF | Tub + toilet + lav |
| 3/4 Bath | 36 SF | 40-50 SF | Shower + toilet + lav |
| Half Bath | 18 SF | 20-30 SF | Toilet + lav only |
| Master Bath | 60 SF | 100-150 SF | Double vanity typical |

### Kitchen
| Kitchen Type | Minimum | Recommended | Work Triangle |
|--------------|---------|-------------|---------------|
| Galley | 70 SF | 100 SF | Max 26' total |
| L-Shape | 100 SF | 150 SF | Max 26' total |
| U-Shape | 150 SF | 200 SF | Max 26' total |
| Island Kitchen | 175 SF | 250+ SF | 42"-48" around island |

### Living Spaces
| Room Type | Minimum | Recommended | Notes |
|-----------|---------|-------------|-------|
| Living Room | 150 SF | 200-300 SF | |
| Family Room | 150 SF | 250-400 SF | |
| Dining Room | 100 SF | 150-200 SF | |
| Home Office | 80 SF | 100-150 SF | |

### Utility Spaces
| Room Type | Minimum | Recommended | Notes |
|-----------|---------|-------------|-------|
| Laundry Room | 35 SF | 50-80 SF | Side-by-side or stacked |
| Mud Room | 30 SF | 50-80 SF | |
| Pantry | 20 SF | 40-60 SF | Walk-in |
| Closets | 6 SF | Per bedroom needs | |

---

## Clearances & Circulation

### Door Clearances
| Location | Clearance Required |
|----------|-------------------|
| In front of door swing | 36" minimum |
| Behind door (at wall) | 0" OK |
| Between doors face-to-face | 48" minimum |

### Fixture Clearances
| Fixture | Front | Side |
|---------|-------|------|
| Toilet | 21" (24" accessible) | 15" to CL (18" accessible) |
| Lavatory | 21" | 4" to wall |
| Tub | 21" | Per fixture |
| Shower | 24" | Per fixture |

### Kitchen Clearances
| Location | Minimum | Recommended |
|----------|---------|-------------|
| Between counters | 42" | 48" |
| At island with seating | 42" traffic + 24" seating | 48" + 24" |
| Dishwasher clearance | 21" | 24" |
| Oven door swing | 21" | 30" |

### Hallway Widths
| Type | Minimum | Recommended |
|------|---------|-------------|
| Main hallway | 36" | 42" |
| Secondary | 32" | 36" |
| Accessible route | 36" | 44" |

---

## Ceiling Heights

### Residential
| Room Type | Minimum | Typical | Luxury |
|-----------|---------|---------|--------|
| Living areas | 8'-0" | 9'-0" | 10'-12' |
| Bedrooms | 7'-6" (code: 7'-0") | 8'-0" | 9'-10' |
| Bathrooms | 7'-0" | 8'-0" | 8'-9' |
| Hallways | 7'-0" | 8'-0" | 9' |
| Garage | 7'-0" | 8'-0" | 10'+ |
| Basement | 7'-0" (finished) | 8'-0" | 9' |

### Ceiling Features
| Feature | Typical Height |
|---------|----------------|
| Tray ceiling step | 12" above main |
| Coffered ceiling | 10"+ finished depth |
| Cove lighting | 6"-12" drop |

---

## Stair Standards

### Stair Dimensions
| Element | Code Minimum | Comfortable |
|---------|--------------|-------------|
| Width | 36" | 42" |
| Riser height | 7-3/4" max | 7" |
| Tread depth | 10" min | 11" |
| Headroom | 6'-8" | 7'-0" |
| Landing depth | Width of stair | Width + 6" |

### Stair Run Calculation
For floor-to-floor of 9'-0" (108"):
- At 7" risers: 108 ÷ 7 = 15.4 → Use 16 risers at 6.75"
- Treads = Risers - 1 = 15 treads
- Run = 15 × 11" = 165" = 13'-9"

### Handrail Heights
| Location | Height |
|----------|--------|
| At stairs | 34" - 38" from nosing |
| At landings | 34" - 38" AFF |
| Guards (open side) | 36" residential / 42" commercial |

---

## Door Sizes

### Interior Doors
| Location | Width | Height |
|----------|-------|--------|
| Bedroom | 2'-8" | 6'-8" |
| Bathroom | 2'-6" or 2'-8" | 6'-8" |
| Closet | 2'-6" | 6'-8" |
| Utility | 2'-8" | 6'-8" |
| Double doors | 5'-0" or 6'-0" pair | 6'-8" or 8'-0" |

### Exterior Doors
| Location | Width | Height |
|----------|-------|--------|
| Main entry | 3'-0" | 6'-8" or 8'-0" |
| Secondary entry | 2'-8" or 3'-0" | 6'-8" |
| Sliding glass | 6'-0" or 8'-0" | 6'-8" |
| Garage entry | 2'-8" | 6'-8" |

### Accessible Doors
| Requirement | Dimension |
|-------------|-----------|
| Clear width | 32" minimum |
| Maneuvering clearance | 18" pull side, 12" push side |
| Threshold | 1/2" max (1/4" for sliding) |

---

## Window Standards

### Window Sizing
| Room | Glazing Area | Sill Height | Head Height |
|------|--------------|-------------|-------------|
| Bedroom | 8% of floor area (egress) | 24"-36" | 6'-8" |
| Living room | 8% of floor area | 18"-30" | 6'-8" |
| Kitchen | 8% of floor area | 42" (above counter) | 6'-8" |
| Bathroom | Varies | 48"+ (privacy) | 6'-8" |

### Egress Window Requirements (Bedrooms)
- Minimum opening: 5.7 SF
- Minimum width: 20"
- Minimum height: 24"
- Maximum sill height: 44" AFF

---

## Garage Standards

### Vehicle Sizes
| Vehicle | Length | Width |
|---------|--------|-------|
| Compact car | 15' | 6' |
| Sedan | 17' | 6.5' |
| SUV | 18' | 6.5' |
| Truck | 19' | 6.5' |

### Garage Sizes
| Type | Interior Size | Notes |
|------|---------------|-------|
| 1-car | 12' × 22' | Tight fit |
| 1-car + storage | 14' × 24' | Better |
| 2-car | 22' × 22' | Minimum |
| 2-car comfortable | 24' × 24' | Recommended |
| 3-car | 32' × 24' | |

### Garage Door Sizes
| Configuration | Width | Height |
|---------------|-------|--------|
| Single car | 8' or 9' | 7' or 8' |
| Double car | 16' or 18' | 7' or 8' |
