Cost to Build a Duplex

Duplex House Building Cost

There is a reason for babies are to sleep alone in a different room. And there is also a reason for 18-year-olds to live out of their parents’ home, either by choice or by request.


However, some individuals, either parents or the adult kids, who are half-hearted about the thought of living apart from each other, may choose to opt for a duplex house instead. In this manner, they can live independently from each other, however, not far enough so they can visit each other at any given time.

Attached houses, including duplexes, have actually been the top most searched for types of houses purchased by Americans in 2019, according to research.

This is understandable seeing that the expense of building a separate home is so high for middle-income earners and spending something close to a million dollars is something out of reach for many.

Typical Cost to Build a Duplex

The nationwide typical cost of building a duplex according to Fixr is $138,500 for a 900 square feet space, with mid-range materials, a standard foundation structure with complete and finished basement, efficient windows and doors, and with finishing prepared for someone to settle in. This costs approximately $154 per square foot, although the nationwide average is closer to $85 – $125, which is usually on the lower end of the spectrum.

For that reason, a two-room duplex would cost around $277,000, if we think about all elements as directly proportional to the overall task cost.

In addition, a two-story, four-unit duplex building of wood and stonework would cost around $552,000 to complete. This is the combined cost of $273,000 worth of material, $268,700 in labor, equipment cost of $9,800, and contractor guidance worth $79,100.

The labor costs will be $70 per hour on average for carpenters, masons, and excavators; electrical experts charge $65 to $85 per hour; plumbing professionals’ rate will vary between $45 to $65 per hour; painters charge $20 to $35 per hour.

What Should be Included

The duplex structure costs would include the standard design of the duplex which is a basic, rectangle-shaped building having the basic four-square units. And seeing that the building and construction of a duplex can not be a Do It Yourself project, working with an architect and a contractor is necessary. These 2 specialists take the 10 – 17% of the overall budget plan for their part.

Nice Looking DuplexThe architect’s part is the determination of the scope of the task and the price quotes of the initial budget plan; preparation of the draft and the final proposed work and overview of plans that include schematic design and layout; acts as project supervisor who administers the building and construction, complete building files, deals with structural engineers and talks to preparation firms to guarantee that the job adheres to structure regulative requirements.

On the other hand, the contractor’s job is to supply the materials, labor power, equipment, and other services that might be needed for the job. If they can’t do a few of the details, they might employ a subcontractor depending upon the requirement; they will also be in charge of the completion.
of all the authorizations needed for the task and provide the last clean-up of the whole project.

Simply put, the overall duplex structure expenses will include the building expenses or the amount you would invest to construct the duplex, site work expense, or the expense to prepare the site that includes access for people, transport, and equipment to and from the worksite; the design and consultant’s costs; and all of the authorization charges to be allowed to build according to or in compliance with laws in place.

Extra Expenses

Before you can build anything, you need to first get a lot where you would want to have the duplex made. Rates differ per geographical location.

Also read our articles about the cost to build a house, rent an apartment, and the cost of an interior decorator.

The approximated cost is limited to only the actual duplex and if you want to have any site enhancements included, like if you want to include a parking space or a garage, a garden, or a backyard for the kids, then prepare to make an additional budget plan for them.

Looking For Duplex House Builders

If you wish to find out just how much is the cost to develop a duplex home in your location, FixR.com uses a locator of professionals who in turn offer totally free price quotes based upon where you live and where you want to build the duplex.

Aspects Affecting Duplex Building Expenses

When having a spending plan, you need to think about all elements before starting to build a duplex. Some things to think about are:

  • The type of materials – the choice of products, whether low-cost, mid-range, or high-cost would significantly impact the total expense of the project, but also the quality of the finished building.
  • The size of the duplex – the remainder of the cost components of the job is proportional to the size of the duplex that you build
  • The number of rooms – the number of rooms being built would indicate additional costs for materials and for that reason, a greater cost of developing a duplex.
  • The design of the building – depending upon your or the professional’s choice, the duplex, and its components can be constructed from scratch with the basic masonry and woodworking products; or through the use pre-fabricated parts like the doors, windows, and the cooking area, to name just a few. Making use of the latter is easier if you’re on a set timeline and more affordable however it can often jeopardize the quality and the general design of your home.
  • Location – all the rates of products and labor will normally depend on the location as each state, city, or county has different costs of living.
  • The contractor – individuals in charge of the completion of the job get a substantial portion of the final price.
  • Professional Costs – the architect or the engineer employed by the contractor or by you as the owner will also determine just how much the professional would charge.
  • Pre-existing structure – the presence of a structure before the building of a brand-new one would considerably impact the general expense of the job. Either you save some money if you just continue or remodel the pre-existing structure, or you invest extra on destroying or getting rid of it from the worksite.
Alec Pow
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