Additions, Remodels and Conversions

Size, scope and what already exists decide how much of the Energy Code applies to a home project. These pages cover additions by size and type, enclosures and conversions, remodel checklists and the questions that come up when existing systems serve new space.

In this section

• Addition size (6)
• Types of additions (6)
• Enclosures and conversions (15)
• Remodel checklists (10)
• Existing systems and compliance method (9)

Addition size

How the square footage of an addition changes the requirements, from small additions to those over 1,000 sq ft.

1. Does a Room Addition Need Title 24?
2. 300 Sq Ft Addition Title 24 Requirements
3. 500 Sq Ft Addition Title 24 Requirements
4. 700 Sq Ft Addition Title 24 Requirements
5. 1,000 Sq Ft Addition Title 24 Requirements
6. Addition Over 1,000 Sq Ft: Title 24 Requirements

Types of additions

Second stories, primary bedrooms, family rooms and kitchen expansions: what each adds to the compliance picture.

1. Second-Story Addition Title 24 Requirements
2. Does a Sunroom Need Title 24?
3. Second-Story Addition: Ducts, Stairwell and Solar Under Title 24
4. Primary Bedroom Addition Title 24 Requirements
5. Kitchen Expansion Title 24 Requirements
6. Family Room Addition Title 24 Requirements

Enclosures and conversions

Turning a sunroom, patio, porch, carport, basement, attic, shed or studio into living space.

1. Does an Attic Conversion Need Title 24?
2. Does a Basement Conversion Need Title 24?
3. Do Shipping Container Homes Need Title 24?
4. Sunroom Conversion Title 24 Requirements
5. Patio Enclosure Title 24 Requirements
6. Porch Enclosure Title 24 Requirements
7. Carport Conversion Title 24 Requirements
8. Basement Conversion Title 24 Requirements in California
9. Attic Conversion to Living Space: Title 24 Requirements
10. Bonus Room Over a Garage: Title 24 Requirements
11. Shed Conversion to Living Space: Title 24 Requirements
12. Detached Studio Conversion to Living Space: Title 24 Requirements
13. Pool House Conversion to Living Space: Title 24 Requirements
14. Guest House Conversion Title 24 Requirements
15. Title 24 for Legalizing an Old Garage Conversion

Remodel checklists

When a kitchen or bathroom remodel triggers Title 24, and what to prepare for remodels that combine windows, HVAC, water heaters and insulation.

1. Does a Kitchen Remodel Need Title 24?
2. Does a Bathroom Remodel Need Title 24?
3. Does a Remodel Need Title 24?
4. Whole-House Remodel Title 24 Checklist
5. Kitchen Remodel: When Title 24 Is Triggered
6. Bathroom Remodel: When Title 24 Is Triggered
7. Remodel With New Windows and HVAC: Title 24 Checklist
8. Remodel With New HVAC and Water Heater: Title 24 Checklist
9. Remodel With New Insulation and Windows: Title 24 Checklist
10. Remodel With Roof and Attic Insulation Changes: Title 24 Checklist

Existing systems and compliance method

Whether existing windows, HVAC and water heaters can serve an addition, and how the prescriptive and performance methods compare.

1. Does Adding Central Air Need Title 24?
2. Prescriptive vs Performance Compliance
3. Can Existing Windows Stay During a Home Addition?
4. Can Existing HVAC Serve a New Home Addition?
5. Can an Existing Water Heater Serve a New Addition?
6. Home Addition With a Mini-Split: Title 24 Design Guide
7. Home Addition With a Heat Pump Water Heater: Title 24 Guide
8. Existing + Addition + Alteration: How the Performance Method Works
9. Prescriptive vs Performance Compliance for Home Additions

For the bigger picture, see everything you need to know about Title 24, the requirements overview and all Title 24 questions.