The estimate calculator is for informational purposes only and may not reflect the final cost of your project.
For a detailed and accurate quote, please contact us directly.
The main factors that impact ADU construction costs
The cost of creating an ADU is determined by a variety of criteria, including size, kind of ADU, construction difficulty, materials, and other features. We will help you understand the approximate cost of your ADU project in Los Angeles County with our ADU financing calculator.
ADU size
ADU size is one of the most important factors in evaluating the ADU estimate. Choosing the right size depends on your needs, space availability and budget. When choosing your ADU size, use our ADU calculator to estimate the cost of projects. Learn more about how ADU size affects costs and capabilities.
ADU size | Details |
|---|---|
Studio (300-400 sq ft) | Ideal for small living spaces or rental units. |
1-Bedroom (400-600 sq ft) | Includes a bedroom, kitchen and living area. |
2-Bedroom (600-800 sq ft) | Larger units with more living space. |
Type of ADU
The type of ADU affects not only the cost of the project, but also its complexity and impact on the entire design of your property. Each type of ADU has distinct characteristics and benefits to suit a variety of uses and conditions. With our ADU cost calculator you can understand the approximate price for your project. It's important to note that depending on the area, the price may vary. Explore all the options and choose the one that best suits your needs.
ADU type | Description |
|---|---|
Junior ADU (JADU) | A smaller unit (up to 500 sq ft) that's part of the main home. |
Garage conversion ADU | Converts an existing garage into a livable space, commonly used for ADUs. |
Attached ADU | Built as an extension to the main house. |
Detached ADU | A standalone structure built on the same property but separate from the main house. |
Lot slope
The lot slope can affect the cost of ADU construction. Building on a level site is easier and less expensive, whereas building on a sloping site requires additional engineering solutions, which increases costs. Additional costs may include foundations, support structures, and drainage systems to ensure the stability and safety of the building.
Design complexity
ADU projects can range from simple to complex, depending on your preferences and budget. We provide both ADUs with simple designs and customized options that are specially made to meet the needs of the customer. Each choice affects the total cost of the ADU.
Design element | Description | Cost impact |
|---|---|---|
Simple layout | Basic design with minimal custom features. | Lower costs. |
Custom design | High-end finishes, unique features like vaulted ceilings or skylights. | Higher costs. |
Materials and finishes
Materials and finishes determine the appearance and longevity of your ADU, as well as a significant portion of the cost. Choosing between standard and premium finishes depends on your budget and preferences. Learn about the different finishes and their impact on comfort and cost.
Material | Description |
|---|---|
Standard finishes | Basic materials (laminate, vinyl flooring. |
High-end finishes | Premium materials (hardwood, granite, custom cabinetry. |
Additional features
Additional features make your ADU more functional, energy efficient and attractive. Solar panels, smart home integration, landscaping and fire sprinklers may increase building costs, but they add significant value to your project.
Feature | Details |
|---|---|
Landscaping and outdoor space | Custom landscaping, patios, walkways and fencing. |
High-end finishes | Custom cabinetry, luxury countertops, designer fixtures. |
Smart home integration | Automated lightning, security, and climate control. |
Solar panel installation | Reduces energy bills and provides sustainable power. |
It's important to remember that the cost of permits and taxes can differ based on the city in Los Angeles County which also has an impact on the project's total cost.
Permit type | Description |
|---|---|
Building permit | Required for all new ADU construction. |
Impact fees | Fees related to infrastructure impacts. |
Utility connection fees | Connecting ADU to existing utilities. |
Financing options for Your ADU
We offer ADU financing solutions to help you realize your project. Learn more about HELOC loans, ADU-specific loans, and cash-out refinancing options to make your dream a reality.
Contingency
Additional expenses may arise during the construction process, such as improving utilities or fixing unexpected soil problems. This is why it’s recommended to allow for a contingency reserve of at least 10% to cover unexpected costs.