Everything it takes to add space, in one scope of work
We coordinate design, engineering, permitting, materials and delivery within your agreed scope. Your homeowner-hired general contractor handles site construction and assembly.
Detached ADUs
Standalone backyard units for rental income, guests, a home office, or multigenerational living. Available in studio, one-, and two-bedroom layouts.
Attached Additions
Room and suite additions engineered to tie cleanly into your existing structure, roofline, and utilities.
Design & Permitting
In-house architectural design tailored to your lot, plus full handling of permit submission and approval with your local jurisdiction.
Site Prep & Foundation
Grading, excavation, foundation work, and utility hookups coordinated in parallel with off-site manufacturing.
Off-Site Manufacturing
Prefabricated panels and components are manufactured off site, then delivered for assembly by the homeowner-hired general contractor.
Rapid Installation
Delivery and assembly are coordinated around site access, foundation readiness and the schedule agreed with your contractor.
Code & Inspection Support
We coordinate documentation and inspection requirements within the agreed scope. Your contractor and local authority handle construction inspections and final approval.
Custom Finishes
Exterior siding and roofline options, plus interior finish packages to match the look of your main house.
Common questions about prefab additions
Your schedule depends on the design, permitting, site work, manufacturing, delivery and assembly scope. HRG reviews these steps with you and your contractor after the property review.
Yes. ADUs and additions require permits in nearly every jurisdiction. Our team handles design documentation and permit submission as part of your project, and we stay current on local zoning rules for ADUs specifically.
The prefabricated panels and components in your materials package are manufactured off site. Your written scope identifies what arrives with the package and what your general contractor completes on site, including foundation, utility and assembly work.
Yes. We offer a range of siding, roofing, and interior finish options, and for attached additions we design the roofline and exterior specifically to tie into your existing home.
We work with several lending partners who specialize in ADU and home addition financing. We're happy to make an introduction during your consultation.