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Engineer structural pros in Newbury Park
Peter T. Erdelyi and his office of 15 employees have designed thousands of residential and commercial projects over the past 37 years - remodels, additions and new buildings
"Quoted one price and kept asking for more money. They only came to the house once, and any changes I had to make (because they didn't have all the information) they changed me more."
Dominic M on July 2023
Peter T. Erdelyi and his office of 15 employees have designed thousands of residential and commercial projects over the past 37 years - remodels, additions and new buildings
"Quoted one price and kept asking for more money. They only came to the house once, and any changes I had to make (because they didn't have all the information) they changed me more."
Dominic M on July 2023
We specialize in home designs, architectural plans and structural drawings for new homes and ADUs, and helping customers get building permits fast. We've been licensed professional engineers in California for over 20 years. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guaranteeing your satisfaction!
"Hired Pacific Sands after we lost our home in the Eaton Fires in Altadena. We were very happy with their team and the designs they finished for us. Their permitting team was amazing too, so happy they were able to help with that part of the process. too. "
Anna H on May 2025
We specialize in home designs, architectural plans and structural drawings for new homes and ADUs, and helping customers get building permits fast. We've been licensed professional engineers in California for over 20 years. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guaranteeing your satisfaction!
"Hired Pacific Sands after we lost our home in the Eaton Fires in Altadena. We were very happy with their team and the designs they finished for us. Their permitting team was amazing too, so happy they were able to help with that part of the process. too. "
Anna H on May 2025
With over 35 years of experience in the landscaping industry, we are the experts you need to take care of your home or business. Perma Green Landscaping has been in business in the Ventura County and surrounding areas for over 30 years. We have specialized in creating spaces for your family to enjoy for years to come. We pride ourselves with our work ethic and reliability to get the job to right the first time. We've helped hundreds of people with all their landscaping needs throughout the years. We have full service customers who've stayed with us from the beginning and we appreciate them. Once you give us a chance, you won't need to look any further for any of your landscaping projects. We are happy to assist you in creating the landscape of your dreams.
"Excellent! Kastor is amazing!! He’s patient, reliable, and was able to pluck the vision from my head, improve it, and execute more beautifully than I ever could have imagined. He turned my home into a show palace, at very reasonable prices. My home is the envy of the neighborhood: beautiful, sleek landscaping & hardscaping, beautiful colored lighting."
Dennis R on September 2021
With over 35 years of experience in the landscaping industry, we are the experts you need to take care of your home or business. Perma Green Landscaping has been in business in the Ventura County and surrounding areas for over 30 years. We have specialized in creating spaces for your family to enjoy for years to come. We pride ourselves with our work ethic and reliability to get the job to right the first time. We've helped hundreds of people with all their landscaping needs throughout the years. We have full service customers who've stayed with us from the beginning and we appreciate them. Once you give us a chance, you won't need to look any further for any of your landscaping projects. We are happy to assist you in creating the landscape of your dreams.
"Excellent! Kastor is amazing!! He’s patient, reliable, and was able to pluck the vision from my head, improve it, and execute more beautifully than I ever could have imagined. He turned my home into a show palace, at very reasonable prices. My home is the envy of the neighborhood: beautiful, sleek landscaping & hardscaping, beautiful colored lighting."
Dennis R on September 2021
Alpha Structural, Inc. has over 850 years of combined technical experience in Foundation and Hillside Repair. All of our experience is hard-core and down-in-the-trenches – not managed from behind a computer. Our in-house engineers and technicians are among the most experienced in all of Southern California. Alpha Structural, Inc. is the ONLY company in the SOCAL area licensed to ENGINEER and BUILD any type of repair project. That means that you'll work with us through the whole project, not unknown sub-contractors that you didn't hire and cannot control or predict. Alpha Structural, Inc. a licensed, bonded, and insured contractor (license # 663409). We are licensed with the following classifications: A (General Engineering Contractor). B (General Building Contractor). C-8 (Concrete). HIC (Home Improvement Contractor). CALL US NOW FOR AN INSPECTION OR ESTIMATE! (323)258-5482.
"I worked with Alpha once before, and they assisted with a second project 2 years ago which, now finally completed, I'm able to write a review about. Alpha helped with structural plans for windows in a garden level unit in order to prepare the proposal for city approval. Alpha is a big company and it took them a little while to complete everything; however I can certainly say that the engineer and contact people were knowledgeable and thorough. The plans were approved with their help and now that the unit is permitted for occupancy, the windows are a lovely attribute to the space."
Robert N on September 2024
Alpha Structural, Inc. has over 850 years of combined technical experience in Foundation and Hillside Repair. All of our experience is hard-core and down-in-the-trenches – not managed from behind a computer. Our in-house engineers and technicians are among the most experienced in all of Southern California. Alpha Structural, Inc. is the ONLY company in the SOCAL area licensed to ENGINEER and BUILD any type of repair project. That means that you'll work with us through the whole project, not unknown sub-contractors that you didn't hire and cannot control or predict. Alpha Structural, Inc. a licensed, bonded, and insured contractor (license # 663409). We are licensed with the following classifications: A (General Engineering Contractor). B (General Building Contractor). C-8 (Concrete). HIC (Home Improvement Contractor). CALL US NOW FOR AN INSPECTION OR ESTIMATE! (323)258-5482.
"I worked with Alpha once before, and they assisted with a second project 2 years ago which, now finally completed, I'm able to write a review about. Alpha helped with structural plans for windows in a garden level unit in order to prepare the proposal for city approval. Alpha is a big company and it took them a little while to complete everything; however I can certainly say that the engineer and contact people were knowledgeable and thorough. The plans were approved with their help and now that the unit is permitted for occupancy, the windows are a lovely attribute to the space."
Robert N on September 2024
Green Republic Landscapes is a premier landscape design-build firm dedicated to transforming outdoor spaces into stunning, functional environments. We specialize in creating customized landscaping solutions that reflect each client's unique vision and lifestyle. Our comprehensive services include: Garden Design and Installation, Expert Planting, Landscape Lighting, Irrigation Systems, Flagstone & Paver Installation and many other high-quality landscaping services. With extensive industry experience and a passion for excellence, GRL delivers results that consistently exceeds expectations. From the initial consultation to the final reveal, we ensure a smooth , enjoyable process-and an outdoor space you'll love for years to come. Let us bring your dream landscape to life. Minimum project investment: $5,000.00
"We couldn't be happier with our backyard project. Motti and Kimberly were just wonderful to work with. They were professional, knowledgeable, friendly, and attentive all throughout the process. They listened to our thoughts and educated us as to all our possibilities. Motti has a wonderful design eye and is so passionate about his work. We were very happy when we used them for the front of our house 4 years ago, this time around for the back, and we would use them again in the future. We recommend them highly."
Janice L on February 2022
Green Republic Landscapes is a premier landscape design-build firm dedicated to transforming outdoor spaces into stunning, functional environments. We specialize in creating customized landscaping solutions that reflect each client's unique vision and lifestyle. Our comprehensive services include: Garden Design and Installation, Expert Planting, Landscape Lighting, Irrigation Systems, Flagstone & Paver Installation and many other high-quality landscaping services. With extensive industry experience and a passion for excellence, GRL delivers results that consistently exceeds expectations. From the initial consultation to the final reveal, we ensure a smooth , enjoyable process-and an outdoor space you'll love for years to come. Let us bring your dream landscape to life. Minimum project investment: $5,000.00
"We couldn't be happier with our backyard project. Motti and Kimberly were just wonderful to work with. They were professional, knowledgeable, friendly, and attentive all throughout the process. They listened to our thoughts and educated us as to all our possibilities. Motti has a wonderful design eye and is so passionate about his work. We were very happy when we used them for the front of our house 4 years ago, this time around for the back, and we would use them again in the future. We recommend them highly."
Janice L on February 2022
Your Trusted Local Landscaping Experts 🌿 We provide comprehensive landscaping services, from design and installation to ongoing maintenance. As a family-owned and locally operated business with over 25 years of experience, we take pride in handling every project in-house—never subcontracting—to ensure the highest quality and attention to detail. ✅ Licensed, Insured & Bonded ✅ Workman’s Compensation Coverage ✅ Free Estimates on All Services Get in touch today by phone or email—we’d love to bring your landscaping vision to life!
"These people will not reply after I took the time to send photos and explain the job. THEY DO NOT WANT TO WORK"
Andre S on June 2024
Your Trusted Local Landscaping Experts 🌿 We provide comprehensive landscaping services, from design and installation to ongoing maintenance. As a family-owned and locally operated business with over 25 years of experience, we take pride in handling every project in-house—never subcontracting—to ensure the highest quality and attention to detail. ✅ Licensed, Insured & Bonded ✅ Workman’s Compensation Coverage ✅ Free Estimates on All Services Get in touch today by phone or email—we’d love to bring your landscaping vision to life!
"These people will not reply after I took the time to send photos and explain the job. THEY DO NOT WANT TO WORK"
Andre S on June 2024
My name is Abel and this is my locally owned and operated company. I have been in business for 25 years. I'm here to provide high quality work. Call today and let me put my experience to work for you!
"Abel was a true professional"
Oscar S on February 2024
My name is Abel and this is my locally owned and operated company. I have been in business for 25 years. I'm here to provide high quality work. Call today and let me put my experience to work for you!
"Abel was a true professional"
Oscar S on February 2024
We can help you get the best from the space available. We consider existing features, good and bad, and how these might fit into the new scheme. What new features would be appropriate bearing in mind the site and your budget. We will provide a sensible plan with options, schemes and work schedules for you to consider and discuss. We are always glad to explain details you are not sure about or to offer alternative suggestions. Our expertise is the management of your exterior space to create a garden to reflect your aspiration...and grounds to be the envy of your neighborhood.
"Good problem solver. Communicates well. Very reasonable and professional."
Tom M on August 2024
We can help you get the best from the space available. We consider existing features, good and bad, and how these might fit into the new scheme. What new features would be appropriate bearing in mind the site and your budget. We will provide a sensible plan with options, schemes and work schedules for you to consider and discuss. We are always glad to explain details you are not sure about or to offer alternative suggestions. Our expertise is the management of your exterior space to create a garden to reflect your aspiration...and grounds to be the envy of your neighborhood.
"Good problem solver. Communicates well. Very reasonable and professional."
Tom M on August 2024
G&L Design Building and Landscape Inc is a licensed general contractor builder who specializes in the outdoors construction, pool and spa construction , deck, retaining wall, gate and fence ,hardscape, landscape, design & build company that has been servicing residential and commercial clients in the Los Angeles and Ventura counties. Although unique and functional design is our passion, outstanding customer service is our number one priority. Our talented landscape designers will listen to your needs and then use their expertise to develop an architectural quality landscape design that fits your personality and lifestyle. Members with the CLCA and Angelus pavers.
"I recently hired G&L Design Building and Landscape for a major outdoor project, and I couldn't be more thrilled with the results! From start to finish, the experience was seamless, professional, and truly impressive. Dror, the owner, is a visionary. His attention to detail, creativity, and commitment to quality were evident in every phase of the project. He took the time to understand my vision and brought it to life even better than I imagined. His team built a stunning retaining wall, installed lush, vibrant turf, and laid down beautiful interlocking pavers that completely transformed the space. On top of that, they planted an incredible selection of trees and flowers that added the perfect finishing touch—absolutely breathtaking! The crew was punctual, respectful, and worked with great care and precision. It’s rare to find a team so dedicated and passionate about their craft. If you're looking for top-tier landscaping and design, look no further than G&L Design. Dror and his team are the real deal—professional, talented, and a pleasure to work with. Highly recommended!"
iuval h on June 2025
G&L Design Building and Landscape Inc is a licensed general contractor builder who specializes in the outdoors construction, pool and spa construction , deck, retaining wall, gate and fence ,hardscape, landscape, design & build company that has been servicing residential and commercial clients in the Los Angeles and Ventura counties. Although unique and functional design is our passion, outstanding customer service is our number one priority. Our talented landscape designers will listen to your needs and then use their expertise to develop an architectural quality landscape design that fits your personality and lifestyle. Members with the CLCA and Angelus pavers.
"I recently hired G&L Design Building and Landscape for a major outdoor project, and I couldn't be more thrilled with the results! From start to finish, the experience was seamless, professional, and truly impressive. Dror, the owner, is a visionary. His attention to detail, creativity, and commitment to quality were evident in every phase of the project. He took the time to understand my vision and brought it to life even better than I imagined. His team built a stunning retaining wall, installed lush, vibrant turf, and laid down beautiful interlocking pavers that completely transformed the space. On top of that, they planted an incredible selection of trees and flowers that added the perfect finishing touch—absolutely breathtaking! The crew was punctual, respectful, and worked with great care and precision. It’s rare to find a team so dedicated and passionate about their craft. If you're looking for top-tier landscaping and design, look no further than G&L Design. Dror and his team are the real deal—professional, talented, and a pleasure to work with. Highly recommended!"
iuval h on June 2025
We Provide All Solutions under one roof! With nearly 20 years of experience serving customers in the valley, Hye Turf Designs, Inc., is the solution for all your LANDSCAPE and outdoors design, pool remodeling needs. PLEASE NOTE WE DO NOT DO MOWING, YARD CLEAN UPS OR MAINTENANCE. We take great pride in our professionalism, timeliness and superior customer service. We strive to develop a lasting relationships so that the next time service is needed, there will be no question on who to call. There is no project is to small or to big, all our designs DONE BY ME ((( HUTCH ))) Installations are done by long team friends subcontractors under HYE TURF DESIGNS supervision, licensed and insured. Satisfaction guaranteed! I chose to work in this industry because I began my career working for several large companies, at which I realized the significant cost of landscaping and outdoors development . Considering how expensive these were for homeowners, I decided to open up my own designing company to provide eco-friendly landscaping design at a much lower price. I vowed to provide only the best customer service and care to keep my clients satisfied. We started in this industry in 2004. We describe our business as Rooted in the community. HOW DO YOU TREAT YOUR OWN CUSTOMERS? THE WAY YOU WANT TO BE TREATED. WORKING WITH ALL THE RELIGIOUS ORGANIZATION WORKING WITH LARGE COMMUNITIES ( H.O.A. ) WORKING WITH PET OWNERS AND KINDER GARDENS WORKING WITH SENIOR CITIZEN COMMUNITY
"All went very well. Hutch was great at helping with design, choosing rock, and obtaining plants. He was also good at remaining calm when we panicked. His workmen were very competent and pleasant. Job was done in record time and within budget. Definitely 5 stars!"
Livia S on October 2023
We Provide All Solutions under one roof! With nearly 20 years of experience serving customers in the valley, Hye Turf Designs, Inc., is the solution for all your LANDSCAPE and outdoors design, pool remodeling needs. PLEASE NOTE WE DO NOT DO MOWING, YARD CLEAN UPS OR MAINTENANCE. We take great pride in our professionalism, timeliness and superior customer service. We strive to develop a lasting relationships so that the next time service is needed, there will be no question on who to call. There is no project is to small or to big, all our designs DONE BY ME ((( HUTCH ))) Installations are done by long team friends subcontractors under HYE TURF DESIGNS supervision, licensed and insured. Satisfaction guaranteed! I chose to work in this industry because I began my career working for several large companies, at which I realized the significant cost of landscaping and outdoors development . Considering how expensive these were for homeowners, I decided to open up my own designing company to provide eco-friendly landscaping design at a much lower price. I vowed to provide only the best customer service and care to keep my clients satisfied. We started in this industry in 2004. We describe our business as Rooted in the community. HOW DO YOU TREAT YOUR OWN CUSTOMERS? THE WAY YOU WANT TO BE TREATED. WORKING WITH ALL THE RELIGIOUS ORGANIZATION WORKING WITH LARGE COMMUNITIES ( H.O.A. ) WORKING WITH PET OWNERS AND KINDER GARDENS WORKING WITH SENIOR CITIZEN COMMUNITY
"All went very well. Hutch was great at helping with design, choosing rock, and obtaining plants. He was also good at remaining calm when we panicked. His workmen were very competent and pleasant. Job was done in record time and within budget. Definitely 5 stars!"
Livia S on October 2023
FAQs for engineer structural projects in Newbury Park, CA
You should replace floor joists as soon as you see clear signs of structural trouble—sagging floors, wide wall cracks, uneven door frames, wet or rotting wood, persistent squeaks, or windows that no longer latch. Tilted or sinking supports in the crawl space are another red flag. If you notice any of these signs, call a pro right away to keep your home’s structure safe.
If the joists are exposed from below, a pro can swap them out without touching the finished floor above. In an unfinished basement or crawl space, you’ll often see the joists and can easily reach them. When insulation, subflooring, or finished flooring blocks access, the crew must remove these materials before repairs can begin.
Sistering allows a pro to reinforce a cracked or undersized joist without tearing up the entire floor. The contractor slowly raises the frame, then fastens a new joist snugly against the damaged one to share the load. When done correctly, sistering restores full structural strength and keeps the floor level without the cost of a complete replacement.
Floor joists installed correctly in a stable environment can last for 100 years or more, often outlasting the house itself. However, termite damage, moisture, leaks, and other problems can significantly reduce a floor's lifespan. For instance, if the floor is exposed to consistent moisture, you'll likely need to replace the joists every 20 to 30 years.
Homeowners' insurance covers floor joist damage resulting from sudden and accidental events, such as fire, windstorm, or water damage from a burst pipe. It will not cover repairs resulting from gradual deterioration, poor maintenance, or termite infestations. Review your insurance policy and consult your provider to verify the conditions that guarantee full coverage. Doing so ensures you are fully aware of your responsibilities and can plan your repair work with complete confidence.
Floor joists are essential structural components that provide a stable foundation for your home. They directly transfer the weight of floors, furniture, and occupants to the foundation, ensuring stability and a safe living environment. Without these robust beams, the structure would face compromised load distribution, leading to potential safety hazards and costly repairs. Proper installation and maintenance are crucial for long-term durability and safety.
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