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TRUSTED BY KEYSTONE, SD HOMEOWNERS

  • Average homeowner rating star icon3.9
    Average homeowner rating
  • Verified reviews icon17
    Verified custom home building reviews

Top-Rated Custom home builders in Keystone - Updated Nov 2026

Avatar for Capitol Builders
Capitol Builders
New to Angi
Find a Custom Home Builder

Serving Keystone, SD and surrounding areas

Approved

In business since 2025

Free estimates

Warranties offered

Capitol Builders is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business. Turning Your Vison Into Reality!

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15 neighbors recently requested a quote
Avatar for Concept Development LIC
Concept Development LIC
4.5(
17
)
Find a Custom Home Builder

Serving Keystone, SD and surrounding areas

In business since 2012

Free estimates

Credit card accepted

"I’m in the process of trying to get a portable restroom installed at my summer cabin. Bernie was extremely helpful with answering all my questions and responded in a very timely manner. I will use this contractor for my project once I have the electric work finished."
Custom shower
Custom bathroom
Here we are removing the old deck or the new additional rebuild
Before
Custom shower

+17

Response time3 days
Response rate100%
Recommended by75%of homeowners
Weidenbach Brother's Construction, Inc.
5.0(
2
)
Find a Custom Home Builder

Serving Keystone, SD and surrounding areas

In business since 1971

Free estimates

"Jeffrey has built me 3 custom homes and we have over 25 years of business with Weidenbach Brother's Construction, Inc. Jeff is an amazing builder, who works hard does a fabulous job on anything he builds. Jeff is, hands down, the best home builder for the fairest price in the Black Hills Region in South Dakota!"
Recommended by100%of homeowners
BJay Nagel Construction, LLC
5.0(
1
)
Find a Custom Home Builder

Serving Keystone, SD and surrounding areas

In business since 2010

Free estimates

We offer over 22 years of industry experience and will provide you with an unmatched level of experience and commitment to your home improvement project. We have earned a solid reputation for a variety of residential home improvement and repair projects to include everything from remodels and carpentry work to custom home builds. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building long-term relationships with our clients and guarantee your satisfaction! References are available upon request. Give us a call today, and let's get started.

Response time2 hrs
Response rate90%
Recommended by100%of homeowners
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Custom Home Builders FAQs, answered by experts

Typically, architects do not build homes in a hands-on sense of doing the actual framing, roofing, or other building. Architects usually do not have the training and experience to build the homes they design. An architect would need to know how to do the specific trades required to build a house, which is possible but not a common practice. A general contractor or homebuilder typically oversees the actual details of building the house that the architect designs.

A carriage house is a freestanding building, while a townhouse is connected to other units. A townhouse is a full single-family home and typically shares a parcel of land with other connected homes. A carriage house is rarely used as the sole single-family home on a property and is most often an additional building sharing property with a traditional single-family home. 

Custom homes can take an average of 18 months to build, mainly due to the lengthy design process, and most projects take somewhere between 12 and 24 months. When you work with the right custom home builders near you, they can help you map the road ahead and understand what can speed up or delay the timeline. Choosing locally available materials, for example, can speed things up without losing that customized touch.

The average cost to build a modular home is around $270,000, and most modular homes total between $180,000 and $360,000. Of course, this price varies significantly by location, and the price tends to follow the cost of living in the area. There are quite a few other factors at play that can affect your pricing, including the following:

  • Number of bedrooms and bathrooms

  • Site preparation, including land clearing and leveling

  • Type of foundation

  • Utility connections

  • Cost of building permits

Green homes are often more expensive to build, averaging around $200 per square foot compared to the $150 per square foot you’d spend to build a standard home. However, green homes can save you money on your utility bills by consuming less energy or creating energy using solar panels or wind turbines on-site. They’re more expensive to build, but they often end up costing less in the long run.

The Keystone, SD homeowners’ guide to custom home building

From average costs to expert advice, get all the answers you need to get your job done.