Looking for a modular home builder in Mountainside, NJ? Describe your project once and up to three modular home builders who work in Mountainside and Union County get back to you with a quote. It's free and there is no obligation.
Mountainside is home to about 7,228 people (2024 Census Bureau estimate), a growing community (+2.9% since 2020). With 1,809 people per sq mi, it is a suburban area. Rural lots and replacements of older homes here are good fits for modular construction.
Mountainside at a glance
- Population (Census Bureau estimate, 2024)
- 7,228 (+2.9% since 2020)
- Rank in New Jersey
- 156th of 323 cities and towns
- Land area
- 4.0 sq mi
- Population density
- 1,809 people per sq mi (suburban)
- Type
- Borough (Mountainside borough)
- Main county
- Union County
What to check before hiring in Mountainside
- Code: in New Jersey, modular homes are built to the state or local building code.
- Site work: foundation, utilities, crane access and finishes must be in the quote.
- Access: delivery trucks and cranes need road and lot access.
- Price drivers: size, finishes, transport distance and site work.
Useful official resources
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Modular Home Builders Association
Official information and guidance.
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ICC: International Code Council
Official information and guidance.
Services available in Mountainside
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Modular home
Factory-built modular home delivered and set on a site-built foundation, with finish work.
Frequently asked questions in Mountainside
How much does a modular home cost in Mountainside, NJ?
It depends on size, finishes, transport and site work. Describe your project: builders who serve Mountainside reply with a quote.
How long does it take?
Often a few months from order to move-in.
Can I customize the design?
Most modular builders offer customizable plans.
Which modular home builders will contact me?
Up to three independent modular home builders who serve Mountainside and the surrounding area, chosen for the service you need. Your details are shared only with your consent.
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.