Residential construction and ADUs in Orange County
Room additions, ADUs, garage conversions, and whole-home renovations. Licensed California contractor. We handle permits, inspections, and finish work from demo to final walkthrough.
What we build
ADUs, additions, and larger residential scopes
Beyond kitchens and baths, CRS Construction takes on room additions, garage conversions, ADUs, and whole-home renovations that need a licensed general contractor to coordinate structure, mechanicals, and finishes.
We work from Fountain Valley across Orange County, filing permits when the city requires them, scheduling inspections, and keeping you updated when scope or lead times change.
California state law has made it easier to add an ADU or junior ADU (JADU) to most single-family lots, with many cities required to process compliant applications on a streamlined timeline. Actual size limits, setback requirements, parking rules, and utility connection requirements still vary by city, so we confirm your lot's specific zoning and code requirements before finalizing a design rather than assuming a one-size-fits-all layout.
Larger scopes also mean more moving parts before a shovel goes in the ground: soils and structural questions, utility capacity, HOA approval where it applies, and a realistic sequence for framing, mechanicals, and finishes. We work through that planning with you up front so the written scope reflects the actual site conditions, not a generic template.
What to expect
How your remodel moves from first call to finish
Service area
Residential construction across Orange County
Licensed in California (CSLB 1021647), based in Fountain Valley. We take new residential construction projects throughout all of Orange County.
Common questions
Residential construction FAQ
Do you build ADUs in Orange County?
Yes. ADU and garage conversion projects are a regular part of our residential construction work, alongside room additions and whole-home renovations. Because ADU rules -- setback distances, maximum size, parking requirements, and utility connections -- vary by city even though California state law sets a baseline that applies statewide, we start with an on-site visit to confirm your lot's specific zoning and what your city will actually approve, rather than assuming a standard layout will work everywhere. That visit also covers practical site questions: where utilities currently run, whether the existing electrical panel has capacity for a second unit, and what access looks like for construction equipment and material deliveries. From there we put together a written scope covering design, permitting, and construction phases so you know what to expect at each stage before committing to the project.
Can CRS manage a project that includes kitchen, bath, and addition work?
Yes, and combining a remodel with added square footage is actually a common way homeowners approach a larger renovation, since permits and disruption to the home overlap regardless of whether the work happens in phases or all at once. We sequence these projects carefully: structural work and the building shell come first, followed by rough plumbing, electrical, and HVAC that has to be in place before walls close up, then the kitchen and bath finish work layers in once the addition is weathertight. Keeping all of this under one contractor means inspections, subcontractor scheduling, and material lead times stay coordinated on a single timeline instead of you managing separate crews and separate permits for each piece. We build the written scope to reflect the full combined project from the start, rather than pricing each piece in isolation.
Who pulls permits for residential construction?
CRS Construction pulls permits whenever your scope requires city approval, which covers nearly every addition, ADU, or structural project. We prepare the plans or coordinate with your architect or engineer, submit the application to your city's building department, and track it through plan check and approval. Once work begins, we schedule inspections at the required stages -- typically foundation, framing, rough mechanical, and final -- and we don't close up walls or pour concrete until each required check has passed. This matters for two reasons: it's how the city confirms the structural, electrical, and plumbing work actually meets code before it's hidden behind drywall or under a slab, and it protects you if you ever sell the home, since unpermitted structural work is one of the more common issues that surfaces during a buyer's inspection or appraisal.
How do residential quotes differ from kitchen or bath-only jobs?
Larger residential projects carry more upfront planning than a kitchen or bath remodel, because there's more that can go wrong if it's assumed rather than confirmed. Before we put together a scope, we look at structural questions, soil conditions if a new foundation is involved, utility capacity for the added square footage, and any city or HOA approval that applies to your specific property. We put together a written estimate after an on-site visit rather than a phone quote, and for projects with multiple stages -- say, a foundation and shell phase followed by interior finish work -- we'll often price it in phases so you can see costs and decision points along the way instead of one lump number covering months of work with unknowns baked in.
Which areas do you serve for ADUs and additions?
We serve all of Orange County from our Fountain Valley office, including Irvine, Huntington Beach, Newport Beach, and the surrounding cities. Larger residential projects like ADUs and additions benefit even more from local knowledge than a kitchen or bath remodel does, since zoning, setback rules, and permit timelines vary by city and directly shape what's actually buildable on a given lot. Working from a central Orange County base means we're already familiar with the permit offices and typical review timelines in the cities we build in most often, which helps set realistic expectations for how long design approval will take before construction can start. If you're outside this immediate list of cities but still in Orange County, it's worth reaching out directly -- our service area is built around the county broadly, not a fixed set of names.
Does an ADU need a separate utility connection?
It depends on your city and utility provider, and this is one of the details that varies the most from one jurisdiction to the next. Some cities and utilities allow an ADU to share the main home's water and electrical service through a submeter, which is typically simpler and less expensive than a fully separate connection. Others require a completely independent utility connection for the ADU, especially for larger detached units or when the main home's existing electrical panel doesn't have capacity for the additional load. Sewer and gas connections have their own city-specific rules as well. We research what your specific city and utility provider require as part of the planning phase, before the design is finalized, since this decision affects both the project budget and where the ADU can practically be sited on your lot.
How long does ADU permit approval take?
California state law requires many cities to process complete, code-compliant ADU applications on an expedited timeline compared to standard discretionary permits, which is meant to make adding an ADU faster and more predictable than it used to be. That said, actual turnaround still depends heavily on your specific city's current workload, whether your submitted plans are complete and meet code on the first pass, and whether any revisions are requested during plan check. We handle the full submission and respond to city comments as quickly as they come in, since delays at this stage are often about how fast plan-check corrections get answered, not just how busy the city is. We'll give you a realistic estimate for your specific city once we know its typical turnaround, rather than quoting a generic number that may not reflect how your jurisdiction actually operates.
Get a residential construction quote
Tell us about your ADU, addition, or whole-home scope. We will follow up to schedule a site visit and written estimate.