J&I Construction is a trusted ADU contractor offering full-scope accessory dwelling unit services, including detached ADUs, garage conversions, granny flats, in-law suites, JADUs, and backyard cottages. Free consultations available.

J&I Construction – ADU Contractor in Bellflower, CA

About J&I Construction

About J&I Construction

J&I Construction is a construction company that has built a strong reputation as an ADU contractor in their region. Over the years, they have developed and refined their design, engineering, and construction processes with a focus on delivering quality accessory dwelling units that add both value and functionality to residential properties.

Their experience in the field covers the full scope of ADU development — from initial concept through to completed construction. This includes working with clients who already have a clear vision for their project, as well as those who need guidance from the ground up. J&I Construction's design team is available to help translate a homeowner's goals into a workable plan that fits within their budget and timeline.

ADU Building Services

As an established ADU builder, J&I Construction handles a range of accessory dwelling unit projects. Their services are built around understanding the client's needs and delivering results that align with both practical requirements and property goals. Key areas of their work include:

  1. Detached ADU builder services for standalone backyard units
  2. Garage conversion contractor work, transforming existing garage spaces into livable units
  3. Granny flat builder and in-law suite builder projects for multigenerational living
  4. JADU contractor services for junior accessory dwelling units within existing home footprints
  5. Backyard cottage builder and Casita construction

Throughout each project, J&I Construction aims to respect the client's vision, stay within the agreed budget, and meet construction deadlines. These are consistent priorities across all the ADU types they build.

Getting Started with J&I Construction

J&I Construction offers a zero-obligation consultation for those interested in exploring an ADU project. This initial meeting is an opportunity to discuss ideas in more detail, understand the scope of work involved, and get a clearer picture of what is possible for a given property. It is a straightforward first step for homeowners considering adding an accessory dwelling unit to their property.

Services

J&I Construction performs the following services

  • Architecture & Design
  • Construction

J&I Construction Reviews

Miryam Ocegueda

2026-02-16
"I hired them for my roof and they did an amazing job."

Tom Guyette

2023-04-08
"These guys were great with repair refurbish seal and paint on our complex at 9501 Mayne. Beautiful thorough job. However, on a tub install and tile patching and on two bathroom fans with new vents, the finish work and duct work were shoddy and they ghosted me, and I've had to spend another 1200 so far redoing their work and will need to schlep abandoned materials they were supposed to take or dispose of on my own. Non trivial things like bags of concrete and old heavy glass shower doors. Definitely mixed experiences. Love the guys but the management and quality on the bathroom were nowhere near as good as the larger exterior job."

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Specifics

Free Consultation In-House Architect In-House Engineer Turnkey Solutions

Opening hours

Monday 8:30AM - 4:30PM
Tuesday 8:30AM - 4:30PM
Wednesday 8:30AM - 4:30PM
Thursday 8:30AM - 4:30PM
Friday 8:30AM - 4:30PM
Saturday -
Sunday -

Location

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