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TRUSTED BY DIAMOND BAR, CA HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon15
    Verified architectural services reviews

Top-Rated Architects in Diamond Bar - Updated Nov 2026

Avatar for Drafting Design Services
Drafting Design Services
4.8(
18
)
Draftsperson/CADD

Serving Diamond Bar, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Credit card accepted

Offers commercial services

"If you?re here looking for an architect, look no further. Francisco is the man for the job. He helped us with a garage to ADU conversion. Francisco kept us informed and communicated with us throughout the entire project. He was very professional, helpful and patient. We had tons of questions and he had the answers. He is very efficient and great at his job. We would hire him again with no hesitation. Thank you Francisco for making for making this process a breeze!"
Response time2 days
3 neighbors recently requested a quote
Recommended by70%of homeowners
Avatar for Peaches and Cream Creative Designs
Peaches and Cream Creative Designs
4.4(
13
)
Designer - Building

Serving Diamond Bar, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2007

Free estimates

Emergency services offered

"These people did an amazing job! Being the guy that I am my house definitely needed some new ideas. I have no clue about interior design, but working with them quickly put me at ease. So if you're looking for a company to guide you in the right direction and create something just for you, go with this interior design company!"
Interior Design job
Bathroom Makeover
Design job
Bathroom Makeover
Design job

+34

Response time1 day
Response rate100%
13 neighbors recently requested a quote
Avatar for CODAspaces
CODAspaces
5.0(
6
)
Architect - For BusinessDraftsperson/CADD

Serving Diamond Bar, CA and surrounding areas

Approved

In business since 2007

Free estimates

Small jobs welcome

"Jeromes extensive experience with business TI projects made him the perfect choice for our needs. Hiring him was one of the best decisions we could have made. His exceptional skill, combined with his genuine kindness and honesty, truly set him apart. Culver City presents its fair share of challenges, particularly with the citys responsiveness, but Jerome and his team went above and beyond. They consistently communicated with the city on our behalf, advocating tirelessly to expedite the permit process and relieve so much of the stress on our end. Jerome dedication and professionalism are unmatched, and his commitment to his clients is evident in every step of the process. If you are looking for an architect with top-tier expertise who truly cares about his clients success, look no further. Jerome is simply the best!"
Response time1 day
14 neighbors recently requested a quote
Recommended by66%of homeowners
Avatar for Ara Hovsepyan Architecture
Ara Hovsepyan Architecture
5.0(
3
)
ArchitectArchitect - For Business

Serving Diamond Bar, CA and surrounding areas

Approved

In business since 2021

Offers commercial services

We specialize in architectural design and documentation for residential, mixed-use, and institutional projects. \nOur studio is led by a licensed architect with professional experience across projects of varying scale\nand complexity. \nClients work directly with the architect throughout the\nprocess, with a focus on clear communication, technical accuracy, and responsiveness.

Granada Hills House
Granada Hills House
Granada Hills House
Granada Hills House
Eagle Rock Addition

+10

Avatar for McCormick Home Builders, Inc.
McCormick Home Builders, Inc.
4.7(
42
)
Designer - Building

Serving Diamond Bar, CA and surrounding areas

Approved

In business since 2017

Free estimates

Customers say: True professional

"Our kitchen remodel with McCormick Home Builders went beyond our expectations. Leoni and her team took the time to understand exactly what we wanted. The open layout design changed the way we use the space, and it’s been perfect for family gatherings. They were prompt, courteous, and genuinely invested in making sure we were happy. Really impressed!"
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.
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+1

Response time6 hrs
Recommended by17%of homeowners
Avatar for RCS Engineering Services
RCS Engineering Services
5.0(
3
)
Architect

Serving Diamond Bar, CA and surrounding areas

Approved

In business since 2018

Offers commercial services

Customers say: Quick response

"I searched many and started off with others and nobody came close in handling what we needed. I found Richard, he came in and took care of it all; it was completed in a timely manner with his accurate thinking. He definitely thought ahead and it saved me a lot of time, grief and money. He got ahead of any issues and resolved potential problems that could arise. He knew exactly what the city would require and did what needed to be done which saved us an untold amount of time and money. I did not know him from Adam, he works at a very different level of ability and knowledge. His pricing for me was the best! He is a gem, get him if you can!"
Slab On Grade - Carport
Foundation Underpinning
Existing Wall
Existing Wall/ Form Work
FOundation Underpinning

+15

Response time8 hrs
Recommended by100%of homeowners
Wilhelm Wolfsohn DBA Sustainability Construction
4.6(
12
)
Designer - Building

Serving Diamond Bar, CA and surrounding areas

Approved

In business since 2007

Free estimates

Small jobs welcome

"This company was one of the first to respond after putting out my request for work on HomeAdvisor. Wil is a very personable business man, his client relations staff is wonderful and they were able to begin work on the project in a reasonable amount of time from first point of contact. I loved the fact that Wilâ s company took on my smaller kitchen project, as most companies had a threshold amount of $4k and didnâ t want to be bothered. Wil has excellent contractors and walked through project with me upon completion. Heâ s got got my future business!"
Response time5 hrs
10 neighbors recently requested a quote
Recommended by81%of homeowners
Avatar for Saris Building
Saris Building
5.0(
5
)
Designer - Building

Serving Diamond Bar, CA and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

Saris Building is a family-run general contracting business serving homeowners and property owners throughout the Los Angeles area. We offer new home construction, home additions, ADUs, garage conversions, and kitchen and bathroom remodeling.\n\nWe work closely with our clients, focusing on clear communication, detailed estimates, and quality workmanship. From home improvements to complete builds, we take pride in treating your property with care and keeping you informed throughout the job.\n\nContact us to discuss your project and how we can help bring it to life.

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Architects FAQs, answered by experts

Some homes, like those with flat roofs, may not have eaves at all. Some contemporary-style homes also lack eaves, although many may have abbreviated eaves to divert water and protect the walls and foundation. Homes without eaves often have specific types of gutters affixed directly to the edge of the roof to provide adequate drainage.

Expect excavation below grade, creating a well for access, weatherproofing, and thorough inspections during setup.

The process typically takes 2-6 weeks, depending on the project size and level of customization.

Your state’s architect licensing registry is an excellent place to begin when finding an architect. The state must license architects after completing the required education and with a minimum amount of experience. You can also ask other homeowners with similar projects who they used and their experience.

Above all, the downside to building a new house is a longer timeline. You need several months to finish the build, depending on the supply chain and labor availability in the meantime. Building a home compared to buying one is also more expensive, both in the building process and when it comes to mortgage rates and property taxes.

The Diamond Bar, CA homeowners’ guide to architectural services

From average costs to expert advice, get all the answers you need to get your job done.