JAM Concept Remodeling is a Portland ADU contractor with 25+ years of experience in basement conversions, garage conversions, home additions, and residential remodeling, helping homeowners add functional living space and long-term property value.

JAM Concept Remodeling – ADU Contractor in Portland, OR

About JAM Concept Remodeling

ADU & Basement Conversion Contractor in Portland

JAM Concept Remodeling is a Portland-based remodeling and construction company specializing in ADU construction, basement conversions, home additions, framing, and residential remodeling throughout the Portland metro area. With over 25 years of construction experience, they help homeowners transform unused spaces into functional living areas designed for long-term comfort, flexibility, and investment value.

Whether a homeowner is planning to build a detached ADU, convert a basement into a legal living space, create an in-law suite, or add functional square footage to their property, JAM Concept Remodeling has the hands-on experience to help bring those projects to life.

What to Know Before Starting an ADU or Conversion Project

Building an accessory dwelling unit or converting an existing basement or garage into a living space requires proper planning, quality construction, and experience working with residential structures. Many older homes in Portland present unique structural and layout challenges that must be carefully evaluated before construction begins.

JAM Concept Remodeling helps homeowners create functional living spaces designed around their property, budget, and long-term goals. Whether the project involves a detached ADU builder scope of work, a garage conversion, basement conversion, or home addition, their team focuses on quality workmanship, practical design solutions, and attention to detail throughout the construction process.

Their experience working on remodeling, framing, additions, and residential construction allows them to understand how to maximize existing spaces while maintaining the integrity and functionality of the home.

Through years of working on older homes and basement remodeling projects, JAM Concept Remodeling has observed that many properties built more than 60 years ago often present structural and foundation conditions that require careful evaluation. In many older basements, they commonly find:

  1. Minimal or no footing reinforcement
  2. Concrete foundation walls without rebar reinforcement
  3. Inadequate exterior drainage systems
  4. Little or no waterproofing protection around foundation walls

These conditions can create long-term moisture and structural concerns if not properly addressed during the planning and remodeling process. That is why thorough investigation and evaluation are important before converting a basement into a finished living space or beginning a major remodeling project.

Construction Experience and Background

JAM Concept Remodeling's construction experience began in the San Francisco Bay Area, where they worked on residential construction, remodeling, and retrofit projects involving older homes and structural improvements. After relocating to Portland, Oregon, they continued working on residential remodeling and custom construction projects alongside local builders and architects for more than a decade.

Over the years, they have gained experience working on basement conversions, ADU construction, home additions, framing, structural remodeling, and older home renovations throughout the Portland metro area. This hands-on background allows them to understand the planning, framing, layout, and structural considerations required to successfully transform unused spaces into functional living areas.

JAM Concept Remodeling works closely with homeowners to help transform unused or outdated spaces into practical living areas suited to modern residential needs. From ADUs and basement conversions to garage conversions and home additions, their focus is on creating spaces that add comfort, flexibility, and long-term value to the property.

They recognize that every home and project is different, which is why they emphasize planning, communication, quality framing, and construction solutions that fit the existing structure of the home. For homeowners seeking additional information about Portland ADU requirements and residential permitting, the City of Portland Bureau of Development Services website is a useful resource.

JAM Concept Remodeling's goal is to provide honest communication, practical construction solutions, and quality workmanship — helping homeowners create comfortable and functional living spaces that add long-term value to their property.

Services

JAM Concept Remodeling performs the following services

  • Construction
  • Feasibility & Site Assessment

JAM Concept Remodeling Reviews

Jason Cowley

2022-12-19
"Ghosted me. Julio came by to look at an urgent plumbing issue I had. He said that he'd email me an estimate within a day. I texted him my email address, as he asked, but got no response. Spent several days calling his mailbox is full and texting with absolutely no response. If you're not available to do the work, a quick message letting me know would have been the professional thing to do. Instead, I had to waste several days trying to get a response out of him before giving up and moving on to someone else."

leslie cormier

2020-06-21
"Julio and JAM Concepts managed the remodel of my basement into a new apartment. It turned out beautifully! Julio and his crew and subcontractors went the extra mile from figuring out a complicated drywall solution to fit in an extra storage closet, to working closely with me on very specific, not-at-all-standard tile pattern in the shower. Julio has a craftman's eye, and genuinely wants your project to be the best it can be. He is also fair, has integrity, and will make a job right. For example, once the flooring started to be installed, we realized the basement floor needed more leveling than originally thought. Julio pulled up the flooring and leveled where needed. He listens and gives thoughtful advice on how things should be done. I would recommend him in a heartbeat."

Gino Reyes

2020-03-17
"Remodeling is a challenging and inconvenient process. J.A.M Concept Remodeling provides ways to keep your projects moving on time, with in budget, while maintaining the highest quality standards. Their team of experts like Cristina Martínez and Julio Mendez have an extensive knowledge and are always willing to go above and beyond expectations. They will never cut corners, ensuring the end results are not only beautiful, but well done. I highly recommend J.A.M Concept Remodeling for your next home improvement project. Gino Reyes"

Bill Ernst

2019-06-03
"I used Jam Concept Remodeling to build our 800SF ADU plus a 200SF detached bedroombath. Building two adjacent buildings in a typical Portland backyard posed special challenges. Access to the site was limited to foot traffic only and room to work was cramped, but they overcame the obstacles and built steadily through a rough winter. The results exceeded my expectations. They came in on budget and completed the project within my expected time frame. Julio and his crew were dependable, conscientious, and very hard working. They are well versed in many of the trades, which made for fewer subs to co-ordinate and kept the project moving right along. Im very happy with the work they did and highly recommend them."

Paz F Pozarycki

2019-04-17
"I have worked with JAM Concept for many of my recent remodels and ADU projects. His work is absolutely amazing and the best value of any contractor I have used in 20 years. His workers are truly reliable and well trained. I highly recommend working with JAM Concept for not only remodels, but also painting, dry well and tile works as well."

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Specifics

25 years in business

Opening hours

Monday 7:00AM - 5:00PM
Tuesday 7:00AM - 5:00PM
Wednesday 7:00AM - 5:00PM
Thursday 7:00AM - 5:00PM
Friday 7:00AM - 5:00PM
Saturday 7:00AM - 5:00PM
Sunday -

Location

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