Orange & Riverside Counties
Arizona
Your Trusted Partner for Complex Home Expansion Projects
Need more space but don’t want to move? Nikolic Construction builds room additions, second story additions, and full house extensions for homeowners across Riverside County, Orange County CA, and Greater Phoenix AZ. Licensed. Owner-operated. Free estimates. We handle permits, design, and construction – start to finish.
- 30+ years building home additions
- Licensed CA (ROC #339561) & AZ (ROC #339561)
- 5.0 Stars - Angi Verified
Home Additions in Riverside, Orange County or Greater Phoenix, AZ
I’ve had this conversation hundreds of times. A family in Murrieta or Temecula has outgrown their home – a new baby, an aging parent moving in, kids who need their own space, or someone now working from home full-time. They love their neighborhood, their schools, their neighbors. Moving sounds terrible. So they call me.
A home addition is almost always cheaper than buying a bigger home – especially in today’s Riverside County market. I’ve helped families add everything from a single bedroom to a full second story, and I’ve seen how much it changes their day-to-day life. Let me walk you through exactly what’s involved.
At Nikolic Construction, we build home additions across Riverside County – Murrieta, Temecula, Menifee, Lake Elsinore, Riverside, Corona, and Norco – as well as Orange County and Greater Phoenix, AZ including Scottsdale, Surprise, Goodyear, and Mesa.
Ready to Build Your ADU in Riverside County or Greater Phoenix?
Get a free consultation – Daniel Nikolic will evaluate your property and give you a clear, honest estimate. Licensed CA(B-972748) & AZ(ROC #339561). No obligation.
Why Homeowners Trust Nikolic Construction for Home Additions
Building a home addition is one of the biggest projects a homeowner undertakes.
Here’s what makes us different from every other contractor you’ll talk to.
Licensed in California and Arizona
CSLB licensed in CA, ROC licensed in AZ. Fully insured with general liability and workers' comp. Ask for our license numbers anytime.
Owner on every project
Daniel Nikolic runs every estimate and is actively involved from permit to handover. You have his direct number.
Transparent, honest pricing
No surprise costs mid-project. We provide detailed written estimates before work begins. What we quote is what you pay.
5.0 Stars on Angi
Every review is from a real homeowner in Riverside County or surrounding areas. Read them on Angi or Google - we're proud of every one.
We handle all permits & inspections
From plan submission to plan check responses to final inspection. We manage the entire permit process in Riverside County, Orange County, and Greater Phoenix.
Local knowledge
We know each city's building department, permit timelines, and common HOA requirements. That local knowledge saves you time and money.
What Homeowners Say About Our ADU Work
Real feedback from verified clients in Murrieta, Temecula, and Lake Elsinore.
Home Addition Service Areas - California & Arizona
and Orange County, CA, and throughout the Greater Phoenix metro in Arizona.
Riverside County – Primary Market
Orange County – Secondary Market
Greater Phoenix Metro
Frequently Asked Questions
Answers from homeowners in Murrieta, Temecula, Riverside County, and Greater Phoenix, AZ.
How much does an ADU cost in Riverside County, CA?
ADU costs in Riverside County typically range from $80,000 for a basic garage conversion to $540,000+ for a large custom detached ADU. A standard 600 sq ft detached ADU costs approximately $180,000–$280,000 including design, permits, and construction. Permit fees in Temecula and Murrieta are typically $1,500–$7,500. California’s 2025 laws waive permit fees for ADUs under 750 sq ft. Nikolic Construction provides free, detailed estimates with no obligation.
How long does it take to build an ADU in Riverside County?
The total timeline from consultation to Certificate of Occupancy is typically 6-12 months in Riverside County. Permit approval takes 4-8 weeks (California law requires cities to decide within 60 days). Construction takes 12-20 weeks depending on the ADU type. Garage conversions can be faster – sometimes 8-14 weeks of construction. Using Temecula’s Permit Ready ADU (PRADU) plans can shorten the design and permit phase significantly.
Do you handle ADU permits in Riverside County and Temecula?
Yes, Nikolic Construction manages the entire permit process for ADU projects in Riverside County, including Murrieta, Temecula, Menifee, Lake Elsinore, Riverside, Corona, and Norco. We prepare and submit all building permit applications, handle plan check revisions, coordinate with Public Works and Fire departments, and schedule all required inspections through to Certificate of Occupancy.
Can I build an ADU in my backyard in Murrieta or Temecula?
Yes. Both Murrieta and Temecula allow ADUs in residential zones under California state law. Key requirements include a minimum 4-foot setback from side and rear property lines, maximum 1,200 sq ft for detached ADUs, and 16-foot height limit (with exceptions). Temecula offers a Permit Ready ADU (PRADU) program with pre-approved plans. There is no minimum lot size requirement. Contact Nikolic Construction for a free property evaluation to confirm ADU feasibility for your specific parcel.
Can I build an ADU (casita) in Scottsdale or Phoenix, AZ?
Yes. Arizona allows ADUs – often called casitas or guest houses – on residential properties in Phoenix, Scottsdale, Surprise, Mesa, and surrounding cities. Arizona ADU regulations differ from California and vary by city, so it’s important to work with a contractor who knows local zoning codes. Nikolic Construction is licensed in Arizona (ROC verified) and has experience navigating Greater Phoenix metro permit requirements for ADU and casita construction.
What is a JADU and should I build one instead of an ADU?
A Junior ADU (JADU) is a smaller version of an ADU – up to 500 sq ft – created within your existing home’s footprint, such as converting a bedroom or part of a garage. JADUs are faster and cheaper to permit and build than a full ADU. Under California 2025 law, JADU permit fees are generally waived. If your goal is to add a small rental unit or in-law space at minimal cost, a JADU might be the right choice. We’ll evaluate both options during your free consultation.
Can I rent out my ADU in California?
Yes. Once your ADU has a Certificate of Occupancy, you can rent it out as a long-term rental in California. In Riverside County, ADUs typically rent for $1,500–$2,500 per month depending on size and location. Short-term rental rules (Airbnb/VRBO) vary by city – check your city’s specific ordinance. Your property taxes will slightly increase based on the ADU’s added value, but the base value of your home is not reassessed.
Contact Nikolic Construction
Owner Daniel Nikolic handles all estimates personally.
Phone - Call or Text
(951) 239-4205
Email Us
d.nikolic@nikolicconstruction.com
Business Hours
Mon - Fri: 7:00am - 5:00pm