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Modern Duplex House Plan with 4 Bedrooms, Vaulted Ceilings & Rear Porches – 1384 Sq Ft
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Plan Number:

J8126-E

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Plan Number:

J8126-E

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Floor Plan
j8126-e cottage duplex house first floor plan, 4 bedrooms, 4 bathrooms | alderhaven bluff house plan

Modern Duplex House Plan with 4 Bedrooms, Vaulted Ceilings & Rear Porches – 1384 Sq Ft

This thoughtfully designed modern duplex house plan combines compact efficiency with comfortable residential living, creating a flexible multi-unit design well suited for investment properties, multigenerational households, or owner-occupied rental opportunities. With a total heated living area of 1,384 square feet, the structure is divided into two well-balanced residential units, each offering 692 square feet of carefully planned single-level living space.

The duplex maintains a clean and approachable architectural profile through its balanced proportions, practical footprint, and efficient layout. Measuring 38 feet wide by 47 feet deep, the structure is compact enough for smaller residential lots while still providing comfortable private living environments for both households. The moderate 6:12 roof pitch contributes visual character and timeless residential appeal while supporting long-term durability and efficient roof drainage.

Each unit is designed with functionality and openness in mind. Vaulted and volume ceilings significantly enhance the sense of spaciousness within the interiors, allowing the compact floor plans to feel larger and more inviting. Natural light moves easily throughout the open-concept living spaces, reinforcing the airy atmosphere and improving overall comfort.

The keeping or family room serves as the central gathering space in each residence, creating a welcoming environment for relaxation and daily living. The open floor plan establishes smooth flow between the living area and kitchen, encouraging social interaction while maximizing usable square footage.

The kitchens are thoughtfully arranged to support efficient meal preparation and casual dining. A central kitchen island provides additional workspace, seating opportunities, and visual connection to the surrounding living spaces. Despite the homes’ compact size, the kitchens maintain excellent functionality and contribute to the modern, open-concept character of the design.

Each unit includes two bedrooms and two full bathrooms, an uncommon and highly desirable feature in smaller duplex layouts. The first-floor master suites provide privacy and comfort while incorporating walk-in closets and private bathrooms for improved convenience and everyday usability. The second bedrooms offer flexibility for guests, children, roommates, or adaptable use as hobby spaces.

An additional standout feature in both residences is the inclusion of a dedicated home office or study area. As remote work and flexible living arrangements continue to shape modern residential needs, this workspace adds substantial long-term value and versatility to the design.

Outdoor living is integrated through private rear porches measuring 92 square feet per unit. These covered porch areas extend the living environment outdoors and create inviting spaces for morning coffee, quiet relaxation, or casual entertaining. The porch design also reinforces the connection between indoor comfort and outdoor enjoyment while maintaining privacy between the two residences.

Built on a slab foundation with practical 2x4 wall framing, the duplex emphasizes efficient construction methods and low-maintenance living. Eight-foot ceilings throughout the primary living spaces maintain comfortable proportions while supporting energy-efficient operation and cost-conscious construction. The home’s modest overall building height of 16 feet 7 inches further contributes to its approachable residential scale.

Architecturally, the duplex balances simplicity with livability. Its efficient layout, private bedroom suites, open gathering spaces, and flexible home office features make it exceptionally adaptable for a variety of residential applications. Whether used as an income-producing rental property, a multigenerational living solution, or a shared family residence, the design provides both practicality and long-term functional appeal.

This modern duplex house plan successfully demonstrates how compact multi-family housing can remain stylish, comfortable, and highly functional. Through smart spatial planning, vaulted interiors, and balanced private living spaces, the design delivers efficient modern living within a refined and approachable architectural framework.



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What's Included in the House Plan:
  • Front Elevation and Construction Notes: Drawing of the front view with construction details and notes.
  • Rear and Side Elevations: Drawings of the rear and side views of the building.
  • Floor Plan: Includes electrical layout, window/door sizes, floor joist span direction, and ceiling type notes (e.g., 9' ceiling, vault).
  • Second Floor Plan: Details similar to the first level, if applicable.
  • Typical Wall Section: Cross-section showing wall construction details.
  • Typical Foundation Details: Construction details for the foundation.
  • Roof Plan: Includes roof pitches, ridges, valleys, with details noting 2" x 8" rafters or optional roof trusses.
  • Foundation Plan: Layout detailing the foundation, including footings, slabs, and walls.
  • Full Building Section (Optional): Available upon request at no extra cost, typically not required in the US but may be necessary in Canada.
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):  1384 sq ft
    All Unheated Under-Roof Areas  184 sq ft
    Total Structure  1568 sq ft
    1st Floor:  1384 sq ft
    Rear Porch:  184 sq ft
  • Bedrooms:   4
    Bathrooms:   4
  • Foundation:   Slab
    Wall Framing:   2x4
    Roof Pitch:  6:12
  • Width of House:  38'
    Depth of House:  47'
    Building Height:  16'7''
  • First Floor Ceiling Height:  8'

Key Features

  • First Floor Master Suite
  • Home Office/Study
  • Keeping/Family Room
  • Kitchen Island
  • Open Floor Plan
  • Private Master Bath
  • Rear Porch
  • Vaulted/Volume Ceilings
  • Walk-in Closet
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Plan Number: J8126-E
Modern Duplex House Plan with 4 Bedrooms, Vaulted Ceilings & Rear Porches – 1384 Sq Ft
4 Bedrooms
4 Full Baths
1384 SQ FT
1 Stories
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J8126-E Cottage Duplex House First Floor Plan, 4 Bedrooms, 4 Bathrooms | Alderhaven Bluff House 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 Modern Duplex House Plan with 4 Bedrooms, Vaulted Ceilings & Rear Porches – 1384 Sq Ft 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 Modern Duplex House Plan with 4 Bedrooms, Vaulted Ceilings & Rear Porches – 1384 Sq Ft 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 Modern Duplex House Plan with 4 Bedrooms, Vaulted Ceilings & Rear Porches – 1384 Sq Ft 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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Modern Duplex House Plan with 4 Bedrooms, Vaulted Ceilings & Rear Porches – 1384 Sq Ft

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