Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
CGI Home Additions & ADU: The Fresno Owner’s Guide
CGI home additions and ADU construction in Fresno typically runs $45,000 – $130,000 installed, with the final number driven by square footage, foundation type, and whether the structure ties into your existing roofline or stands separately. We stock and install the framing, window, siding, and interior finish components that CGI-specified plans call for, and we can usually start your project within a few weeks of the written estimate. Most Fresno homeowners realize their existing structure has failed when they see drywall cracks radiating from window corners, doors that no longer latch, or a roofline that visibly sags where an old addition was tied in.
We’re an independent Fresno remodeling contractor, not affiliated with CGI. What that means for you is straightforward: we install to CGI-compatible specifications without being tied to any manufacturer’s price book. You get the written price before anything comes off the truck, and the 365-Day Done Right Promise covers the whole job.
Which CGI Models This Applies To
CGI’s home addition and ADU product lines break into two broad categories: attached additions that tie into the existing roof and foundation, and detached ADUs built on their own slab or pier-and-beam footing. The compatibility question is less about a single model number and more about how your existing home was framed when the original work was done. In Fresno’s older neighborhoods like the Tower District, we regularly see additions that were stick-framed with 2×4 walls where CGI’s current specs call for 2×6 exterior walls to meet Title 24 energy requirements. That’s a compatibility gotcha worth knowing before you plan: an addition permitted under current Fresno code needs more wall depth than what was common twenty years ago, and that changes how the roofline ties in.
When we assess a CGI-compatible addition or ADU, we look for the original permit packet or framing plan. If you don’t have it, we measure the existing wall cavities, check the foundation depth at the tie-in point, and verify the roof pitch before we write a single line of the estimate. For aftermarket components like windows and exterior doors, we spec James Hardie siding and GAF roofing where the plan allows, because those manufacturers publish their own compatibility data and their warranties travel with the finished project. The same logic applies to interior finishes: KraftMaid and Wellborn cabinets, Cambria or Silestone countertops, Kohler or Moen fixtures. You can research every named product we put in the scope.
Styles & brands we work with
Signs Your CGI Home Additions & ADU Is Failing
- Drywall cracks at the tie-in point. Where an addition meets the original house, the two structures settle at different rates. A hairline crack is normal; a crack you can fit a quarter into means the connection is moving more than it should.
- Doors that stick or won’t latch in summer. Fresno’s summer heat expands framing lumber. If a door only misbehaves in July and August, the frame may have been installed too tight against the rough opening. If it’s year-round, the foundation is likely shifting.
- Visible sag in the roofline where the addition ties in. This usually points to undersized rafters or a compromised ledger board. It’s also the sign you should not ignore, because a failing roof connection lets water into the wall cavity.
- Gaps between the baseboard and the floor. When a floor system settles unevenly, baseboards pull away in specific spots rather than uniformly. Mark the gap with a pencil line and check it again in thirty days.
- Water staining on interior ceilings near the addition seam. The flash point for CGI-style tie-ins is the transition where old roof meets new. Fresno gets most of its rain in a handful of storm events, and that’s when a marginal flashing detail shows itself.
Replacement Cost & What’s Included
In Fresno, a full home addition runs $45,000 – $130,000, while a detached ADU ranges from $90,000 – $220,000 depending on size and finishes. Garage conversions fall between $30,000 and $80,000. The single biggest variable is foundation work: a slab-on-grade addition costs less than one that needs piers or a stem wall to match your existing home’s height. After that, it’s square footage, roofline complexity, and the finish level you choose for kitchens and baths.
Every estimate we write includes the written line-item price before work starts, the named materials in the scope, permits pulled and inspections passed, and the 365-Day Done Right Promise on the completed work. We don’t do change orders unless you ask for a change. If the crew finds something unexpected inside the wall, we document it, we explain it, and we give you a written number before we touch it. If you have questions about where the range lands for your specific lot, call (559) 540-8453. The estimate is free, and it comes with an answer you can verify.
See the difference
Before
After
Before
After
Before
AfterDIY or Call Us?
There are things you can check on your own, and there are places where you should not put a ladder without a second person and a real plan. Checking drywall cracks, testing doors, and watching your baseboards costs you nothing. Climbing onto a sagging roofline or opening a wall cavity to inspect a ledger board is a different conversation. If the structure is visibly moving, the roof is heavy, and the connection between an addition and the original house is under tension. That is not a DIY diagnosis.
Graham Stein has been reading plans and framing walls in California for going on twenty-six years, and the crew that shows up at your Fresno home will be background-checked, uniformed, and told before they arrive that shoe covers go on at the door and drop cloths stay down in the hallways. Call (559) 540-8453 if something looks wrong. We’ll tell you whether it’s a real problem or a normal house noise.
FAQs
Properly framed and tied-in additions last fifty years or more, but the components that fail first in Fresno’s climate are exterior-grade: roof flashing, window seals, and siding joints. The dry heat breaks down caulking and gaskets faster than coastal air does. Our workmanship warranty covers the structure; the manufacturer warranties on James Hardie, GAF, and the interior brands cover the products. Call (559) 540-8453 and we’ll walk you through exactly which warranty applies to which part of the job.
Yes, in many cases a tie-in repair or foundation correction is far less expensive than tearing out and rebuilding. The decision comes down to where the movement is happening and whether the original framing was undersized. We’ll write down exactly what we see, what it costs to fix, and what it costs to rebuild, so you can compare both numbers side by side. The estimate is free at (559) 540-8453.
A typical addition runs twelve to sixteen weeks from permit approval to final inspection, depending on scope and weather. An ADU often runs four to eight months because of the separate foundation, utility connections, and the Fresno permitting process. We keep a project calendar that gets updated when something changes, not when it’s convenient to mention it. If you call (559) 540-8453, we’ll give you a realistic window for your specific project.
We don’t warehouse every component, but we maintain local supplier relationships in Fresno for framing lumber, James Hardie siding, GAF roofing, and the cabinet and countertop brands we name in our scopes. What we do stock is the knowledge of what works in Fresno’s climate and Fresno’s code cycle. The written price you get includes those materials by name, so you’re never paying for a mystery box of “builder grade” anything. Call (559) 540-8453 to get that price on paper.
Contact Elmstead Remodeling Fresno
If your CGI home addition or ADU is showing signs of trouble, or if you’re planning a new one, call (559) 540-8453 for a free written estimate. We’re Elmstead Remodeling Fresno, a Cedarwell company, and we serve Fresno and nearby areas with the Cedarwell Care Promise on every job: shoe covers and drop cloths inside your home, a photo of the clean-up before we leave, quiet tools during rest hours where we can, and a written price before any work starts. Write it down before anything comes off the truck, and keep it that way from the first nail to the final walkthrough.
Written by Graham Stein, Owner, Elmstead Remodeling Fresno at Elmstead Remodeling Fresno, serving Fresno and nearby areas.
