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Second story addition builders in Ontario

Avatar for Decoland, Inc.
Decoland, Inc.
5.00(
5
)
Approved Pro
Decoland, Inc.
5.00(
5
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2150 local quotes requested

**Decoland Landscape & Construction Design DOES IT ALL** We were founded in 2007 with one goal in mind - to provide a FULL RANGE superior landscaping services, including landscaping, hardscaping and lawn maintenance, at affordable rates to the residents of Laguna Hills. Our company has grown over the years from a two person operation into a full staff of professionals able to meet your every landscaping need. We are dedicated to building long term relationships with our clients by providing the highest standard of quality on each and every project we do. Our reputation for customer satisfaction in the Laguna Hills area is what has made Decoland Landscape & Construction Design a household name in the industry. At Decoland Landscape & Construction Design, we understand that the outdoor aesthetic of your home or business is as important as your interior. We have a team of experts that will consult with you to determine your exact needs. From landscape maintenance to new construction, our residential and commercial clients in Laguna Hills know that when they call Decoland Landscape & Construction Design they will get the best. Contact us today for a FREE consultation and see the difference experience makes!

"Sean was fantastic. Not only did he help me create my Landscape vision but he walked me through the whole Process. He already knew all the HOA rules and guidelines. This was a no brainer in choosing him and Decoland to do my backyard. Anyone looking to do landscaping and/or any house remodeling should definitely look into using him. He’s already doing my other house right now. It’s coming out great."

Jr c on January 2025

**Decoland Landscape & Construction Design DOES IT ALL** We were founded in 2007 with one goal in mind - to provide a FULL RANGE superior landscaping services, including landscaping, hardscaping and lawn maintenance, at affordable rates to the residents of Laguna Hills. Our company has grown over the years from a two person operation into a full staff of professionals able to meet your every landscaping need. We are dedicated to building long term relationships with our clients by providing the highest standard of quality on each and every project we do. Our reputation for customer satisfaction in the Laguna Hills area is what has made Decoland Landscape & Construction Design a household name in the industry. At Decoland Landscape & Construction Design, we understand that the outdoor aesthetic of your home or business is as important as your interior. We have a team of experts that will consult with you to determine your exact needs. From landscape maintenance to new construction, our residential and commercial clients in Laguna Hills know that when they call Decoland Landscape & Construction Design they will get the best. Contact us today for a FREE consultation and see the difference experience makes!

"Sean was fantastic. Not only did he help me create my Landscape vision but he walked me through the whole Process. He already knew all the HOA rules and guidelines. This was a no brainer in choosing him and Decoland to do my backyard. Anyone looking to do landscaping and/or any house remodeling should definitely look into using him. He’s already doing my other house right now. It’s coming out great."

Jr c on January 2025


Embee & Associates
8010 Haven Avenue
5.00(
2
)
Approved Pro
Embee & Associates
8010 Haven Avenue
5.00(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
172 local quotes requested

Here at Embee & Associates, Inc., we pride ourselves in a job well done. With an eye for detail, we will help your dreams become realities so please contact us today for a fast and friendly service that you will not be disappointed in!! I chose to work in this industry because I have a passion for building and completing projects. I also have substantial past experience in this field. I served in the Army in a construction MOS. After completing my service, I started working for a California state electrical indentured apprenticeship program. Soon after completing the program, I became a superintendent for an electrical company. Subsequently, I started working with EmBee and associates as a project manager and have been managing projects for 10 years. We started in this industry in 1955. We describe our business as Multi-generational.

"Can’t say enough positives about Embee, they came in and really helped in all facets of what was a very stressful time dealing with insurance companies and our housing hoa. They kept me informed and when the time came they went above beyond my expectations, I would recommend them to anyone who needs this kind of work."

James M on May 2025

Here at Embee & Associates, Inc., we pride ourselves in a job well done. With an eye for detail, we will help your dreams become realities so please contact us today for a fast and friendly service that you will not be disappointed in!! I chose to work in this industry because I have a passion for building and completing projects. I also have substantial past experience in this field. I served in the Army in a construction MOS. After completing my service, I started working for a California state electrical indentured apprenticeship program. Soon after completing the program, I became a superintendent for an electrical company. Subsequently, I started working with EmBee and associates as a project manager and have been managing projects for 10 years. We started in this industry in 1955. We describe our business as Multi-generational.

"Can’t say enough positives about Embee, they came in and really helped in all facets of what was a very stressful time dealing with insurance companies and our housing hoa. They kept me informed and when the time came they went above beyond my expectations, I would recommend them to anyone who needs this kind of work."

James M on May 2025


Avatar for AMII Construction
AMII Construction
5338 Rose Avenue
5.00(
5
)
Approved Pro
AMII Construction
5338 Rose Avenue
5.00(
5
)
Approved Pro
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
669 local quotes requested

AM II Construction has over 15years of experience in the residential construction, building from the ground-up to finish Our team will go above and beyond insure the customers are happy and satisfied with the work completed. Working with our clients to insure the outcome they have insite and helping them understand the process to completions Our team is able to provide hard work and dedication to service the IE and surrounding areas If you are looking for top quality and outstanding outcomes then give my team a call

"Very professional group of guys very clean and high quality of work, would definitely hire them again and recommend them to family and friends."

Edgar D on March 2025

AM II Construction has over 15years of experience in the residential construction, building from the ground-up to finish Our team will go above and beyond insure the customers are happy and satisfied with the work completed. Working with our clients to insure the outcome they have insite and helping them understand the process to completions Our team is able to provide hard work and dedication to service the IE and surrounding areas If you are looking for top quality and outstanding outcomes then give my team a call

"Very professional group of guys very clean and high quality of work, would definitely hire them again and recommend them to family and friends."

Edgar D on March 2025


Rancho Remodel
960 W 9th St
4.59(
54
)
Approved Pro
Rancho Remodel
960 W 9th St
4.59(
54
)
Approved Pro
Customers say: Quality work
380 local quotes requested
21 years of experience

Rancho Remodel specializes in, but is not limited to kitchen and bath remodel. We guarantee quality work, personal customer service, and attention to custom detail. Large or small, your job receives our personal, professional attention. Rancho Remodel is a small, family-owned business. Twenty-five years of experience has given us the vision to remain small which enables us to focus our attention on exceptional customer service and customer satisfaction. Rancho Remodel is a member of the Better Business Bureau. We are a licensed, bonded and insured General Contractor. Rancho Remodel's reputation and commitment to quality and personal service will never be compromised.

"Everything was perfect! This was not our first project with Scott so we new it would be a great experience going in. We absolutely love our kitchen and how much more storage we have. His team completely gutted the kitchen, removed ceiling soffits so taller cabinets could be installed and removed a wall to create a more open flow to the dining room. The soffit removal did pose a challenge due to an AC vent one wall of the kitchen, but Scott was able to find a solution that made us happy. I can't say enough good things about working with Scott. We picked out the materials and appliances and he took care of the rest. He was also extremely patient and gracious during the process considering how indecisive we were. I can't imagine better contractor to work with!"

Georgia M on July 2018

Rancho Remodel specializes in, but is not limited to kitchen and bath remodel. We guarantee quality work, personal customer service, and attention to custom detail. Large or small, your job receives our personal, professional attention. Rancho Remodel is a small, family-owned business. Twenty-five years of experience has given us the vision to remain small which enables us to focus our attention on exceptional customer service and customer satisfaction. Rancho Remodel is a member of the Better Business Bureau. We are a licensed, bonded and insured General Contractor. Rancho Remodel's reputation and commitment to quality and personal service will never be compromised.

"Everything was perfect! This was not our first project with Scott so we new it would be a great experience going in. We absolutely love our kitchen and how much more storage we have. His team completely gutted the kitchen, removed ceiling soffits so taller cabinets could be installed and removed a wall to create a more open flow to the dining room. The soffit removal did pose a challenge due to an AC vent one wall of the kitchen, but Scott was able to find a solution that made us happy. I can't say enough good things about working with Scott. We picked out the materials and appliances and he took care of the rest. He was also extremely patient and gracious during the process considering how indecisive we were. I can't imagine better contractor to work with!"

Georgia M on July 2018


Avatar for Wonevista Construction
Wonevista Construction
1115 Clorinda Drive
5.00(
2
)
Approved Pro
Wonevista Construction
1115 Clorinda Drive
5.00(
2
)
Approved Pro
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
4 years of experience

We are licensed and bond and insured complete home remodeling specialists. We are the people who get the job done correctly. We are the construction workers that you can rely on. We are the team who make your dream come true.

"George installed our kitchen cabinets and did an amazing job! He answered my questions, was very clean and my friends & family were really impressed. Would I rehire George?? Yes, I definitely would. I’m planning on remodeling my bathroom and will reach out when we’re ready. Thank you again George!"

Diane- Cabinet Customer Monterey Park D on December 2024

We are licensed and bond and insured complete home remodeling specialists. We are the people who get the job done correctly. We are the construction workers that you can rely on. We are the team who make your dream come true.

"George installed our kitchen cabinets and did an amazing job! He answered my questions, was very clean and my friends & family were really impressed. Would I rehire George?? Yes, I definitely would. I’m planning on remodeling my bathroom and will reach out when we’re ready. Thank you again George!"

Diane- Cabinet Customer Monterey Park D on December 2024


Avatar for LA Carpet Kitchen, Bath & More
LA Carpet Kitchen, Bath & More
2410 Wardlow Rd
4.26(
23
)
Approved Pro
LA Carpet Kitchen, Bath & More
2410 Wardlow Rd
4.26(
23
)
Approved Pro
Customers say: Super punctual
2411 local quotes requested
38 years of experience

Welcome to LA Carpet, your trusted partner in home remodeling. With over 35 years of experience in the industry and a staggering over 300,000 satisfied customers, we have solidified our reputation as a premier provider of top quality flooring, Kitchen, and bath solutions in Los Angeles, Orange County, and Riverside. Deals: - 50% Off A Complete Kitchen & Bathroom Remodeling - 12YR 2.99% APR Financing - 5YR 0% APR Financing

"It went very well, they are fast, cleaned up after themselves, very efficient and they installed our appliances"

Iren s on June 2023

Welcome to LA Carpet, your trusted partner in home remodeling. With over 35 years of experience in the industry and a staggering over 300,000 satisfied customers, we have solidified our reputation as a premier provider of top quality flooring, Kitchen, and bath solutions in Los Angeles, Orange County, and Riverside. Deals: - 50% Off A Complete Kitchen & Bathroom Remodeling - 12YR 2.99% APR Financing - 5YR 0% APR Financing

"It went very well, they are fast, cleaned up after themselves, very efficient and they installed our appliances"

Iren s on June 2023


Avatar for 1 Degree Construction
1 Degree Construction
13107 Ventura Blvd Ste. 206
4.90(
135
)
Approved Pro
1 Degree Construction
13107 Ventura Blvd Ste. 206
4.90(
135
)
Approved Pro
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
5296 local quotes requested

1 Degree Construction is a premier design/build construction firm in Los Angeles, providing exceptional remodeling, renovation, and new construction services for residential properties throughout Hollywood and its 10 surrounding areas, such as West Hollywood, Beverly Hills, Santa Monica, Culver City, Studio City, Burbank, Glendale, Silver Lake, Los Feliz, and Sherman Oaks. Our skilled team offers a comprehensive range of services, including: Kitchen remodeling: From minor updates to complete transformations, our team can help you create the kitchen of your dreams. Check out our kitchen remodeling portfolio for inspiration. Bathroom remodeling: Whether you're looking to update your current bathroom or create a luxurious spa-like space, we can bring your vision to life. Explore our bathroom remodeling portfolio for ideas. Home additions: Need more space for your growing family or a dedicated home office? We can help you design and build the perfect addition. View our home additions portfolio for examples. New construction: From concept to completion, we provide expert guidance and exceptional craftsmanship for new construction projects. See our new construction portfolio for inspiration. Discover our glowing reviews on Yelp at yelp.com/biz/1-degree-construction-los-angeles-2, and follow us on Facebook at facebook.com/1degreeconstruction and Instagram at instagram.com/1degreeconstruction/?hl=en for our latest projects and design ideas. Learn more about our licensing, project history, and dedication to quality workmanship on BuildZoom at buildzoom.com/contractor/1-degree-construction, and watch our informative construction process videos and client testimonials on our YouTube channel. Experience the difference with our dedicated and professional team, serving the greater Hollywood area with excellence. Contact us at 310-804-8933 to discuss your project and receive a personalized quote.

"I had a really tricky situation with an old bathroom that had plumbing issues and weird layout quirks. 1 Degree Construction came in, assessed everything honestly, and gave me a fair estimate without sugarcoating the challenges. What I appreciated most was their problem-solving mindset. They reconfigured the space brilliantly and worked closely with me on every design choice – from grout color to mirror size. Every crew member that came through was respectful of my home, wore booties inside, and genuinely seemed to care about their work. No shortcuts. I still can’t believe this is my bathroom – it’s stunning!"

Nathaniel P on June 2025

1 Degree Construction is a premier design/build construction firm in Los Angeles, providing exceptional remodeling, renovation, and new construction services for residential properties throughout Hollywood and its 10 surrounding areas, such as West Hollywood, Beverly Hills, Santa Monica, Culver City, Studio City, Burbank, Glendale, Silver Lake, Los Feliz, and Sherman Oaks. Our skilled team offers a comprehensive range of services, including: Kitchen remodeling: From minor updates to complete transformations, our team can help you create the kitchen of your dreams. Check out our kitchen remodeling portfolio for inspiration. Bathroom remodeling: Whether you're looking to update your current bathroom or create a luxurious spa-like space, we can bring your vision to life. Explore our bathroom remodeling portfolio for ideas. Home additions: Need more space for your growing family or a dedicated home office? We can help you design and build the perfect addition. View our home additions portfolio for examples. New construction: From concept to completion, we provide expert guidance and exceptional craftsmanship for new construction projects. See our new construction portfolio for inspiration. Discover our glowing reviews on Yelp at yelp.com/biz/1-degree-construction-los-angeles-2, and follow us on Facebook at facebook.com/1degreeconstruction and Instagram at instagram.com/1degreeconstruction/?hl=en for our latest projects and design ideas. Learn more about our licensing, project history, and dedication to quality workmanship on BuildZoom at buildzoom.com/contractor/1-degree-construction, and watch our informative construction process videos and client testimonials on our YouTube channel. Experience the difference with our dedicated and professional team, serving the greater Hollywood area with excellence. Contact us at 310-804-8933 to discuss your project and receive a personalized quote.

"I had a really tricky situation with an old bathroom that had plumbing issues and weird layout quirks. 1 Degree Construction came in, assessed everything honestly, and gave me a fair estimate without sugarcoating the challenges. What I appreciated most was their problem-solving mindset. They reconfigured the space brilliantly and worked closely with me on every design choice – from grout color to mirror size. Every crew member that came through was respectful of my home, wore booties inside, and genuinely seemed to care about their work. No shortcuts. I still can’t believe this is my bathroom – it’s stunning!"

Nathaniel P on June 2025


Avatar for ALSA CONSTRUCTION
ALSA CONSTRUCTION
.
5.00(
3
)
Approved Pro
ALSA CONSTRUCTION
.
5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
3 years of experience

At ALSA Construction, we deliver a seamless remodeling experience with a focus on customer satisfaction. Specializing in kitchen and bathroom remodeling, ADU/garage conversions, and pergola installations, we bring expert craftsmanship and personalized service to every project. What sets us apart is our attention to detail, commitment to quality, and tailored approach that ensures your vision is brought to life. From start to finish, we prioritize open communication and your satisfaction, creating beautiful, functional spaces that enhance your home’s value and appeal.

"They took care of the process from A-to-Z. They helped me with the design and implementation was very thoroughly thought and smooth. Anar was helpful throughout the process."

Burak O on January 2025

At ALSA Construction, we deliver a seamless remodeling experience with a focus on customer satisfaction. Specializing in kitchen and bathroom remodeling, ADU/garage conversions, and pergola installations, we bring expert craftsmanship and personalized service to every project. What sets us apart is our attention to detail, commitment to quality, and tailored approach that ensures your vision is brought to life. From start to finish, we prioritize open communication and your satisfaction, creating beautiful, functional spaces that enhance your home’s value and appeal.

"They took care of the process from A-to-Z. They helped me with the design and implementation was very thoroughly thought and smooth. Anar was helpful throughout the process."

Burak O on January 2025


Avatar for Skyline Konstruction
Skyline Konstruction
Po. Box 1606
4.91(
11
)
Approved Pro
Skyline Konstruction
Po. Box 1606
4.91(
11
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1289 local quotes requested

At Skyline Konstruction we have taken "CON" out of construction! We are a family owned and operated company. We take great pride in our work, expertise, quality, and customer service that we provide to meet every home owner’s needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of every project. We take every project personal. Our reputation is based on service, safety and quality, regardless of how large or small the job is. Here at Skyline Konstruction anything is posible!. We are looking forward to working with you!

"Juan and his crew were very professional and did excellent work!"

Todd And Lisa P on June 2024

At Skyline Konstruction we have taken "CON" out of construction! We are a family owned and operated company. We take great pride in our work, expertise, quality, and customer service that we provide to meet every home owner’s needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of every project. We take every project personal. Our reputation is based on service, safety and quality, regardless of how large or small the job is. Here at Skyline Konstruction anything is posible!. We are looking forward to working with you!

"Juan and his crew were very professional and did excellent work!"

Todd And Lisa P on June 2024


Avatar for So Cal Builders & Design Inc
So Cal Builders & Design Inc
15335 Morrison St
4.60(
212
)
Approved Pro
So Cal Builders & Design Inc
15335 Morrison St
4.60(
212
)
Approved Pro
Customers say: Quality work
5443 local quotes requested
43 years of experience

So Cal Builders & Design have been helping the homes throughout California look perfect one nail and brick at a time! With the best prices and highest standard of service, we can deliver the kitchen or bathroom of your dreams on time and on budget! Our staff of trained technicians will build your addition or remodel to your specifications; using only the finest quality materials and the most up-to-date building procedures. We also have in house masonry service as well as perform a number of other services such as plumbing, lighting, painting, patios, and much more. Because we do it all ourselves, we eliminate miscommunication, stress and down time. We don’t use outside contractors or fancy gimmicks to get our customers. We combine new and modern building practices with tried and true hard work to deliver a work of art every time and that is why our customers make us #1. Request Your Free Estimate Voice Star: (888) 284-9122.

"After 30+ years of dreaming about a kitchen remodel, we finally did it—and choosing SoCal Builders & Design was the best decision we could’ve made. David, our project manager, was professional, organized, and communicated every step clearly. Any minor hiccup was handled immediately, and we always felt informed and in control. Every tradesperson on the job was skilled, respectful, and meticulous. The end result exceeded our expectations—our new kitchen is stunning, functional, and feels like it came straight out of a design magazine. We’re already planning bathroom renovations and wouldn’t think of calling anyone but David and SoCal Builders & Design again. True professionals from start to finish!"

Tracy D on June 2025

So Cal Builders & Design have been helping the homes throughout California look perfect one nail and brick at a time! With the best prices and highest standard of service, we can deliver the kitchen or bathroom of your dreams on time and on budget! Our staff of trained technicians will build your addition or remodel to your specifications; using only the finest quality materials and the most up-to-date building procedures. We also have in house masonry service as well as perform a number of other services such as plumbing, lighting, painting, patios, and much more. Because we do it all ourselves, we eliminate miscommunication, stress and down time. We don’t use outside contractors or fancy gimmicks to get our customers. We combine new and modern building practices with tried and true hard work to deliver a work of art every time and that is why our customers make us #1. Request Your Free Estimate Voice Star: (888) 284-9122.

"After 30+ years of dreaming about a kitchen remodel, we finally did it—and choosing SoCal Builders & Design was the best decision we could’ve made. David, our project manager, was professional, organized, and communicated every step clearly. Any minor hiccup was handled immediately, and we always felt informed and in control. Every tradesperson on the job was skilled, respectful, and meticulous. The end result exceeded our expectations—our new kitchen is stunning, functional, and feels like it came straight out of a design magazine. We’re already planning bathroom renovations and wouldn’t think of calling anyone but David and SoCal Builders & Design again. True professionals from start to finish!"

Tracy D on June 2025

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FAQs for second story addition building service projects in Ontario, CA

Converting a vaulted ceiling into a second floor requires three to six months from planning to completion. The process begins with several weeks of design and engineering, followed by permit applications, which vary in processing time by location. 

Construction itself spans several months, including framing, systems installation, and finishing work. Weather conditions, contractor availability, and inspection schedules can all influence your project timeline.

Several factors could make your conversion challenging or impossible. Inadequate roof support structures, insufficient foundation capacity, or problematic truss configurations might require prohibitively expensive modifications. 

Some homes lack the minimum ceiling height (12 feet at the lowest point) needed for functional second-floor spaces. Building code restrictions in your area might also limit conversion possibilities, particularly in historic districts or homes with specific architectural designations.

Begin with professional assessments from both an architect and a structural engineer who will evaluate your home's specific characteristics. They'll examine existing framing, measure available headroom, assess load-bearing capacity, and identify potential obstacles like HVAC ducts or plumbing vents. 

These experts will also review local building codes to determine feasibility. Their preliminary analysis provides crucial information about structural requirements and potential limitations before you commit to the project.

Whether you'll need temporary housing depends on several factors, including the project's scope and your tolerance for construction disruption. Major structural work creates significant noise, dust, and potential utility interruptions that many families find challenging to live with. Safety concerns may also arise during certain construction phases. 

Some homeowners successfully remain by isolating the construction zone and establishing clear work schedules. Discuss living arrangements with your contractor early in the planning process to make informed decisions.

The Ontario, CA homeowners’ guide to second story addition building services
From average costs to expert advice, get all the answers you need to get your job done.
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