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Stylish 3-Bedroom Duplex with Spacious Two-Story Floor Plan
4.8
Plan Number:

AB5973-A

Rated 4.8
Plan Number:

AB5973-A

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Floor Plan
stylish 3-bedroom duplex with spacious two-story floor plan
floor plan
floor plan
stylish 3-bedroom duplex with spacious two-story floor plan

Stylish 3-Bedroom Duplex with Spacious Two-Story Floor Plan

Colbourne Springs 29378 is a two-story duplex house plan featuring a total of 4,128 square feet of heated living area, designed with a symmetrical side-by-side layout. Each unit occupies a footprint of 28 feet in width and 50 feet in depth, allowing the structure to fit on a lot with a total width of 56 feet. This configuration balances density with individual privacy, providing a practical solution for multi-family living or rental income opportunities.

The main level of each unit encompasses 1,618 square feet, anchored by an open-concept kitchen equipped with a central island and a designated dining area. A fireplace serves as the central focal point of the living space, while a dedicated home office provides a quiet zone for remote work. The floor plan includes two full bathrooms and a half bath, ensuring adequate facilities for residents and guests alike.

With 2,510 square feet allocated to the second floor, the design maximizes vertical space to accommodate three bedrooms, including a primary suite with an ensuite bath and walk-in closet. The 9-foot ceilings on the first floor and 8-foot ceilings on the second floor create distinct height profiles for each level, contributing to the overall interior volume and light distribution throughout the living areas.

Construction details for this duplex include a slab foundation and 2x6 exterior wall framing, providing a robust structural base. The roof is defined by an 8:12 pitch and a maximum building height of 32 feet, which gives the exterior a traditional profile. The integrated 4-car garage covers 966 square feet, offering secure parking and additional storage capacity for both units.

Key Features: two-story duplex, 4,128 total sq ft, 3-bedroom units, 4-car garage, slab foundation, 2x6 framing, 8:12 roof pitch, kitchen island, fireplace, home office, primary suite with walk-in closet.

Review plan layouts, available formats, and customization options for the Colbourne Springs 29378 duplex today.

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What's Included in the House Plan:
  • Cover Page – Front elevation, general notes, design criteria, abbreviations, and symbols
  • Elevations – Scaled front, rear, and side views, plus roof aerial
  • Foundation Plans – Engineered for slab or basement
  • Main Floor Plan – Fully dimensioned for framing, with wall thickness notes
  • Second Floor Plan – Same detail as main floor
  • Electrical & Sections – Separate page with electrical layout and typical wall/stair sections
  • Technical Support – Plan-related assistance included
What's Not Included:
  • Architectural or Engineering Stamp: Handled locally if required.
  • Site Plan: Created locally when needed.
  • Mechanical Drawings: Heating, air equipment, and ductwork to be designed by subcontractors.
  • Plumbing Drawings: Pipe sizes and locations to be determined by subcontractors.
  • Energy Calculations: Handled locally if required.

House Plan Specifications

  • Total Living (heated area):  4128 sq ft
    All Unheated Under-Roof Areas  966 sq ft
    Total Structure  5094 sq ft
    1st Floor:  1618 sq ft
    2nd Floor:  2510 sq ft
  • Garage:  966 sq ft
    Garage Bays:   4
    Garage Load:   Front
  • Bedrooms:   6
    Bathrooms:   6
    Half Bathrooms:   2
  • Foundation:   Slab
    Wall Framing:   2x6
    Roof Pitch:  6:12
  • Width of House:  56'0''
    Depth of House:  50'0''
    Building Height:  32'0''
  • First Floor Ceiling Height:  9'
    Second Floor Ceiling Height:  8'

Key Features

  • Fireplace
  • Formal Dining Room
  • Home Office/Study
  • Kitchen Island
  • Patio
  • Second Floor Master Suite
  • Walk In Closets
Modify this plan to make it perfect
Our hassle-free process makes it easy to modify your dream home. To receive an estimate please submit your request using the link below.
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Plan Number: AB5973-A
Stylish 3-Bedroom Duplex with Spacious Two-Story Floor Plan
6 Bedrooms
6 Full Baths
2 Half Baths
4128 SQ FT
2 Stories
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Stylish 3-Bedroom Duplex with Spacious Two-Story Floor Plan
floor plan
floor plan
Bonus Room
Stylish 3-Bedroom Duplex with Spacious Two-Story Floor Plan
House Plan Formats Explained

PDF (Single Build)

A complete set of working drawings delivered in digital PDF format. This option comes with a license to build ONE home and includes a copyright release for printing unlimited sets of plans and making modifications.

CAD + PDF (Single Build)

A complete set of working drawings delivered in digital DWG and PDF formats. AutoCAD files are used by design professionals to make significant modifications or engineering calculations to the plan. This option comes with a license to build ONE home and includes a copyright release for printing unlimited sets of plans and making modifications.

5 or 8 Prints (Single Build)

Five or eight printed sets of working drawings shipped to you. This option comes with a license to build ONE home.

5 Prints + PDF (Single Build)

Five printed sets of working drawings shipped to you, plus a digital version in PDF format. This option comes with a license to build ONE home and includes a copyright release for printing unlimited sets of plans and making modifications.

PDF (Multi Build)

A complete set of working drawings delivered in digital PDF format. This option comes with a license to build an UNLIMITED number of homes and includes a copyright release for printing unlimited sets of plans and making modifications. This option may not be available for all house plans, or may require a specific format to be purchased. Please call 770-831-6363 for more information.

CAD + PDF (Multi Build)

A complete set of working drawings delivered in digital DWG and PDF formats. AutoCAD files are used by design professionals to make significant modifications or engineering calculations to the plan. This option comes with a license to build an UNLIMITED number of homes and includes a copyright release for printing unlimited sets of plans and making modifications. This option may not be available for all house plans, or may require a specific format to be purchased. Please call 770-831-6363 for more information.

Choose a building foundation for your home. The foundation provides stability to a home's structure from the ground up.

Slab - This concrete foundation is reinforced with steel rods and suitable for flat ground.

Crawl Space - This foundation is raised off the ground with low walls resting on footings, providing space for wiring, plumbing, and storage.

Basement - This foundation is entirely or partially below ground and offers storage or living areas.

Walkout Basement - This foundation is typically suited for rear-sloping lots and provides storage or living areas. Walkout basements have doors that provide access to the outside.

Readable Reverse
An option to reverse the plan including texts and dimensions to make them readable.
2x4 or 2x6 Conversion
Convert the exterior framing other than the standard framing included in the plan.
Multi Build Licence (CAD required) Gives the buyer the legal right to build the house plan multiple times
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JoAnne and the entire staff was extremely helpful and patient with us while we decided between 2 homes. This home has outstanding curb appeal and a great layout perfect for us. I work from home so having the home office off the foyer is fantastic. I converted the wet bar into a storage closet for my office. We also extended the laundry room into the porch and created a multipurpose laundry/mud room. I would buy from archival designs again and again.
Rita Long
Milwaukee, WI
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It took almost a year to pick a plan. Since my husband and I retired a few years ago we wanted this last house had to have everything we wanted and needed. The kitchen is my favorite part of the house. I can see what’s happening in my neighborhood through my kitchen window and watch my husband garden in the back yard. Our children think we made a smart decision when we picked this house for our senior years.
Elaine SmithsonPierre
South Dakotaomer
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We’ve had an amazing experience with our new home and are excited to be moved in. The customer service we received during our modifications was exceptional. We are loving the open layout of the kitchen and family room. It feels spacious and I’m already planning on hosting holiday dinners at home. We recommend Archival Designs to anyone interested in building the home they’ve always wanted!
Sandra Hawkins
Montgomery, AL
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We absolutely adore the Kildare Place house plan. Made some modifications to make this home ours! Our house is the talk of the neighborhood. We host big parties every holiday and still get compliments from our friends and family. We searched for months and looked through hundreds of floor plans and this one had almost everything we wanted, and with the help of the great staff at Archival Designs we got exactly what we wanted!
Nick Lazzari
Bakersfeild, CA
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FAQ

Can I modify this Stylish 3-Bedroom Duplex with Spacious Two-Story Floor Plan now or later?

Absolutely. We offer in-house modification services to adjust layouts, room sizes, or expand garages before purchase. If you prefer to make adjustments during the construction phase, purchasing the CAD file package allows your local builder or architect to make on-site changes. Simply click 'Request a Modification' for a free quote.

How much will it cost to build this Stylish 3-Bedroom Duplex with Spacious Two-Story Floor Plan and why aren't exact costs shown? 

Construction costs vary significantly ($150–$300+ per sq. ft.) based on your location, material choices, and local labor rates. Because site preparation and regional codes differ, it is hard to provide a universal cost always.

Will this Stylish 3-Bedroom Duplex with Spacious Two-Story Floor Plan fit my lot, and can I add a basement or flip the layout?

You can check the 'Modifications' tab for width and depth requirements. To fit your site's orientation, most plans are available in a 'Right Reading Reverse' (mirrored) format. We also offer slab, crawlspace, and basement foundation adjustments for every design.

Do your plans meet building codes in my area and do I need a professional stamp?

Our plans meet or exceed national IRC (International Residential Code) standards. However, due to varying local requirements regarding seismic, wind (hurricane), or snow loads, house plans do not come with a professional architect’s or engineer’s seal. Most municipalities require a review and stamp by a local licensed professional to obtain a building permit.

Are plumbing, HVAC, and mechanical drawings included?

We provide the architectural and schematic electrical framework, but HVAC and plumbing layouts are not included. Because local codes and climate-specific systems vary significantly across the country, these are best finalized by your local subcontractors to ensure your home’s systems are optimized for your specific site and energy requirements.

Why should I choose Archival Designs and are the plans guaranteed?

With over 40 years of experience, Archival Designs provides high-quality, builder-ready designs that balance aesthetic elegance with structural integrity. We offer a Best Price Guarantee, a 10% discount for military and first responders, as well as builder discounts for life. And loyalty perks for pro builders. All plans are designed to comply with the IRC codes at the time of their creation. Learn more about our Best Price Guarantee.

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Stylish 3-Bedroom Duplex with Spacious Two-Story Floor Plan

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