ADU for You

Roof for Two

Anna Morrison Architect + Leonardo Leiva Rivera

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Exterior Rendering

$215,000 - $275,000

1 Bedroom

1 Bathroom

406 sq. ft.

Project Information

On the prototypical NYC lot, this backyard ADU tucks against the townhouse, turning tightness into invention. With no sideyard to rely on, it inserts a fully separate unit—perfect for grown kids returning, grandparents close by, or a little extra rental income. Above, the roof becomes bonus space: a deck for the main house, doubling the project’s value. The ADU acknowledges the NYC backyard as a semi-public stage: a colorful, sculptural roof sheds water while performing for neighbors looking down. Domestic and civic, private and shared, this compact insertion makes backyard life bigger, brighter, and more New York.

ADU Type

Attached

Building Shape

Rectangular

Square Footage

406 sq. ft.

Width Maximum dimension of the building exterior

15 ft

Length Maximum dimension of the building exterior

39 ft

Building Height Maximum dimension including apex of any pitched roofs

13.5 ft

Ceiling Height Living Space

8.5 ft

Ceiling Height Bathroom

8 ft

Ceiling Height Sleeping Space

varies ft

Business Information

Business Name

Anna Morrison Architect + Leonardo Leiva Rivera

Business Designation

Not Applicable

Business Location

Brooklyn, NYBrooklynNY

anna.caledonia@gmail.com, leoleivar@gmail.comanna.caledonia@gmail.comleoleivar@gmail.com

Phone Number

Not Applicable

Registered Design Professional (RDP)

Anna Morrison

Email of Registered Design Professional

anna.caledonia@gmail.com

Phone Number of Registered Design Professional

Not Applicable

Estimated Cost

Estimates should be rounded to the nearest $10,000 and include building construction, architecture blueprints, engineering blueprints (if applicable), contractor coordination, and city coordination. This estimate does not include costs associated with establishing site connections or any anticipated site specific costs.

What is the current lowest total estimated construction cost of the ADU?

$215,000$215000

What is the current highest total estimated construction cost of the ADU?

$275,000$275000

Project Components

Appliances

Refrigerator

Construction Type

Stick-built

Architectural Features

Covered Porch

Style

Contemporary

Material and Finishes

Primary Structural System Material

Not Applicable

Facade Material

Stucco

Kitchen Flooring

Wood

Bathroom Flooring

Wood

General Flooring

Wood

Certifications

Industry certifications such as LEED certification, Passive House Certification, and a Zero Energy Ready Home (ZERH) are acquired after building construction. By checking the boxes below, the applicant certifies to the best of their knowledge that the submitted design is compatible with the following standards:

LEED v4.1 Residential: Single Family Certification

Passive House Certification

Zero Energy Ready Home (ZERH)

ENERGY STAR (75 or higher on EPA's 1–100 scale)

Other

Accessibility

Is the ADU designed with architectural barriers such as steps at the entrance or between rooms?

Not Applicable

Is the ADU designed with assistive railings (grab bars) installed in the bathroom?

Not Applicable

Is the ADU designed to accommodate a wheelchair users?

Yes

Sustainability Features and Certifications

Criteria for energy efficient mechanical systems, building envelope, material sourcing, and material circularity are met when the ADU design exceeds sustainability standards established by New York City, federal agency, and industry standards.

For sustainable design practices, please refer to existing city guidelines and standards such as:

HPD Design Guidelines for New Construction
New York City, Environmentally Preferable Purchasing (EPP), Minimum Standards for Construction
Clean and Circular: Design and Construction Guidelines (NYCEDC)

Mechanical Systems and Building Envelope

Is the ADU designed to incorporate a heat pump that operates with higher-than-minimum equipment efficiencies according to HPDs Electric Heating Policy?

Yes

Is the ADU designed to incorporate drain-water or wastewater heat recovery?

Not Applicable

Does the ADUs insulation exceed the minimum requirements for New York City Energy Conservation Code (NYCECC)?

Yes

Is the ADU designed to harvest, treat, and reuse greywater to meet a portion of the project’s non-potable water needs?

Not Applicable

Is the ADU designed with windows with a U-Factor of ≤ 0.27?

Not Applicable

Is the ADU designed with windows with a Solar Heat Gain Efficient (SHGC) of ≤ 0.4?

Not Applicable

What is the Window to Wall Ratio (WWR) of the ADU?

9 %

Material Sourcing and Circularity

Is the ADU design specified to use building materials or products have been extracted, harvested or recovered, as well as manufactured within a 500-mile radius of the project site?

Not Applicable

If the ADU is designed to use wood as a construction material, is it designed to use wood from a sustainable forest?

Yes

If the ADU is designed to use concrete as a construction material, is it designed to use low-carbon concrete?

Not Applicable

If the ADU is designed to use steel as a construction material, is it designed to use recycled steel and/or steel from electric arc furnaces (EAFs)?

Not Applicable

$215,000 - $275,000

1 Bedroom

1 Bathroom

406 sq. ft.

Project Information

ADU Type

Attached

Building Shape

Rectangular

Square Footage

406 sq. ft.

Width Maximum dimension of the building exterior

15 ft

Length Maximum dimension of the building exterior

39 ft

Building Height Maximum dimension including apex of any pitched roofs

13.5 ft

Ceiling Height Living Space

8.5 ft

Ceiling Height Bathroom

8 ft

Ceiling Height Sleeping Space

varies ft

Business Information

Business Name

Anna Morrison Architect + Leonardo Leiva Rivera

Business Designation

Not Applicable

Business Location

Brooklyn, NYBrooklynNY

anna.caledonia@gmail.com, leoleivar@gmail.comanna.caledonia@gmail.comleoleivar@gmail.com

Phone Number

Not Applicable

Registered Design Professional (RDP)

Anna Morrison

Email of Registered Design Professional

anna.caledonia@gmail.com

Phone Number of Registered Design Professional

Not Applicable

Estimated Cost

What is the current lowest total estimated construction cost of the ADU?

$215,000$215000

What is the current highest total estimated construction cost of the ADU?

$275,000$275000

Project Components

Appliances

Refrigerator

Construction Type

Stick-built

Architectural Features

Covered Porch

Style

Contemporary

Material and Finishes

Primary Structural System Material

Not Applicable

Facade Material

Stucco

Kitchen Flooring

Wood

Bathroom Flooring

Wood

General Flooring

Wood

Certifications

LEED v4.1 Residential: Single Family Certification

Passive House Certification

Zero Energy Ready Home (ZERH)

ENERGY STAR (75 or higher on EPA's 1–100 scale)

Other

Accessibility

Is the ADU designed with architectural barriers such as steps at the entrance or between rooms?

Not Applicable

Is the ADU designed with assistive railings (grab bars) installed in the bathroom?

Not Applicable

Is the ADU designed to accommodate a wheelchair users?

Yes

Sustainability Features and Certifications

For sustainable design practices, please refer to existing city guidelines and standards such as:

HPD Design Guidelines for New Construction
New York City, Environmentally Preferable Purchasing (EPP), Minimum Standards for Construction
Clean and Circular: Design and Construction Guidelines (NYCEDC)

Mechanical Systems and Building Envelope

Is the ADU designed to incorporate a heat pump that operates with higher-than-minimum equipment efficiencies according to HPDs Electric Heating Policy?

Yes

Is the ADU designed to incorporate drain-water or wastewater heat recovery?

Not Applicable

Does the ADUs insulation exceed the minimum requirements for New York City Energy Conservation Code (NYCECC)?

Yes

Is the ADU designed to harvest, treat, and reuse greywater to meet a portion of the project’s non-potable water needs?

Not Applicable

Is the ADU designed with windows with a U-Factor of ≤ 0.27?

Not Applicable

Is the ADU designed with windows with a Solar Heat Gain Efficient (SHGC) of ≤ 0.4?

Not Applicable

What is the Window to Wall Ratio (WWR) of the ADU?

9 %

Material Sourcing and Circularity

Is the ADU design specified to use building materials or products have been extracted, harvested or recovered, as well as manufactured within a 500-mile radius of the project site?

Not Applicable

If the ADU is designed to use wood as a construction material, is it designed to use wood from a sustainable forest?

Yes

If the ADU is designed to use concrete as a construction material, is it designed to use low-carbon concrete?

Not Applicable

If the ADU is designed to use steel as a construction material, is it designed to use recycled steel and/or steel from electric arc furnaces (EAFs)?

Not Applicable