ClaimedModular
Signature Building Systems
Founded 1992; privately held; Moosic, PA plant
PA directory
Modular homes in Pennsylvania: factory-built builders
Modular, ADU, and factory-built companies serving Pennsylvania. Compare listings, then contact builders directly.
In this market
Research for modular homes in Pennsylvania covers Philadelphia suburbs, Pittsburgh and western counties, Lancaster and Lehigh factory corridors, and the central corridor between. Prefably organizes 70 factory-built companies statewide, modular, panelized, manufactured, and specialty operators, so you can compare ratings without lead-marketplace markups.
Appalachian and rural lots often favor modular or manufactured packages with crawlspace or basement foundations; denser suburbs may look at panelized or compact modular for infill. Snow loads, frost depth, and municipal design review vary widely, request engineering notes for your township, not a one-size statewide assumption.
Every row on this page links to a Prefably company profile. Listings start as Unclaimed public records drawn from business data; builders can claim them free to update contact info and specialties. Prefer profiles with published ratings and a working website, then request a written factory-vs-site scope before you deposit.
Directory
Modular home builders in Pennsylvania
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Unclaimed
Mountain View Modular Homes and General Contractor
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UnclaimedModularManufactured
Stonybrook Home Sales of Thomasville
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Context
More about prefab in Pennsylvania
Ground truth for Pennsylvania buyers: DCED runs the Industrialized Housing and Buildings Program. Every modular home placed in the Commonwealth must carry the Pennsylvania Insignia of Certification plus the evaluation-agency insignia. Production started on or after June 1, 2026 must follow the 2021 ICC codes. Local UCC permits still govern foundation, setbacks, and occupancy. Lancaster County and the Lehigh Valley remain major factory corridors; Philadelphia L&I still inspects set and insignia on site. HUD-code manufactured homes follow a different federal label and are not interchangeable with PA insignia modules for lending.
Browse this directory to shortlist modular home builders that Pennsylvania buyers can call with a clear scope request. Company profiles show ratings and websites; Unclaimed listings remain searchable until companies claim them free. Prefer builders who separate factory price from site package in writing.
Contact companies directly from Prefably, then read our modular cost and financing guides before you schedule deposits. Neighboring-state links on this page can help if your lot sits near a state line.
FAQs
Prefab homes in Pennsylvania
How many prefab and modular builders does Prefably list in Pennsylvania?
As of 2026, Prefably lists 65 factory-built home companies associated with Pennsylvania in this directory (claimed and unclaimed). Counts change as companies claim profiles or we add listings — use the cards on this page for the current shortlist, then contact builders directly.
Is Pennsylvania a major modular hub?
Yes. Pennsylvania hosts more modular home factories than any other state, with strong corridors in Lancaster County and the Lehigh Valley.
Do Pennsylvania municipalities accept modular?
Yes. DCED’s Industrialized Housing and Buildings Program requires the Pennsylvania Insignia of Certification. Certified modules are accepted statewide; local UCC permits still govern site work.
What code do new PA modular homes follow?
Production started on or after June 1, 2026 must follow the 2021 ICC codes under the DCED program. Confirm the code year on your insignia package.
Are manufactured homes of PA the same as modular?
No. HUD-code manufactured homes use a federal label and a different lending path. Modular homes of PA carry the state insignia and are typically real-property when set on a permanent foundation.
How do I find a local modular builder that delivers to my county in Pennsylvania?
Use this directory to shortlist companies that advertise Pennsylvania service, then ask each one to confirm haul routes, crane access, and set crews for your specific county, not just the nearest metro. Rural lots often need a site visit before a quote is real. Open Prefably profiles for ratings and websites, compare at least three written factory-vs-site scopes, and treat “statewide” marketing as a starting claim, not proof. Pair this page with our prefab-vs-modular and cost guides before you deposit.