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If your home no longer meets your space or lifestyle needs, it may be time to expand—without the cost or stress of moving. At Hi-Tech Builders Inc., we specialize in expertly crafted home and room additions throughout Los Angeles and surrounding areas. Whether you’re adding a bedroom, expanding your kitchen, or building an entirely new level, we bring your vision to life with smart design, expert construction, and long-lasting results.
With over 30 years of experience as a licensed, bonded, and insured general contractor, we offer end-to-end room addition services—from planning and permits to structural construction and interior finishes.
A home addition is a structural extension of your current property, designed to increase your livable space and improve your home’s functionality. Whether it’s adding a new bedroom, enlarging a kitchen, or building a second story, additions offer an excellent return on investment while enhancing your quality of life. Unlike renovations, which modify existing spaces, additions create entirely new areas, seamlessly integrated with your current floor plan and architecture.
At Hi-Tech Builders Inc., our home and room addition services are designed to expand your living space while maintaining the comfort, style, and structure of your existing home. Whether you need an extra bedroom, a larger kitchen, a new bathroom, or an entire second story, we deliver seamless additions that feel like a natural extension of your house.
Growing families, guests, or multi-generational living arrangements often call for more bedrooms. We build custom bedroom additions with thoughtful layouts, closets, windows, and personalized finishes to create peaceful, private retreats. Whether it’s a first-floor guest suite or a master bedroom extension, we ensure your new space blends seamlessly into your home’s structure and style.
Is your kitchen too cramped for your lifestyle? Our kitchen additions offer the space you need for better flow, modern appliances, expanded storage, and casual dining. We can reconfigure layouts, knock down walls, or extend your kitchen outward to accommodate an island, breakfast nook, or walk-in pantry. Our team ensures that the transition from old to new is seamless—both aesthetically and functionally.
Your living room should be a welcoming, versatile space where your family can relax and entertain. We specialize in living room additions that open up tight floor plans and create room for comfort, natural light, and custom features such as built-in shelving, fireplaces, or entertainment centers. Whether you're building outward or reconfiguring space, we design with flow and function in mind.
Maximize your square footage by building up instead of out. A second-story addition is perfect for homeowners who need extra space but want to preserve outdoor areas. We handle everything—from engineering and foundation reinforcement to full upstairs construction and integration with your existing structure. It's an ideal solution for adding multiple rooms, bathrooms, or even a private guest suite.
The demand for dedicated home workspaces has never been higher. Whether you're working remotely or need a quiet area for hobbies, we design custom home offices that prioritize productivity and privacy. We incorporate soundproofing, storage, electrical outlets, smart lighting, and ergonomic layouts to support your day-to-day needs.
Adding a bathroom can significantly boost your home’s functionality and value—especially in households with growing families or guests. We construct bathroom additions with updated plumbing, custom tile work, modern fixtures, and stylish design. Whether it's a half-bath, full bathroom, or luxury en-suite, we build with comfort and water efficiency in mind.
Full-Service Design & Build: We guide you through every step, from architectural blueprints and 3D renderings to permits, demolition, construction, and final inspections.
Seamless Aesthetic Integration: Our additions are designed to match your home’s original layout, exterior finishes, roofline, and structural details—so it looks like it was always there.
High-Quality Materials & Craftsmanship: We only use trusted, long-lasting materials and partner with skilled tradespeople who value precision and professionalism.
On-Time & On-Budget Delivery: With transparent pricing, dedicated project managers, and reliable scheduling, we complete projects efficiently without cutting corners.
Fully Licensed, Bonded & Insured: Your property and peace of mind are protected from day one.
Hi-Tech Builders Inc. is proud to maintain a strong digital presence across trusted platforms to help you explore our work, read verified reviews, and connect with us easily. From Houzz and Yelp to Google Business and Thumbtack, our online profiles showcase project galleries, customer feedback, and service details. These profiles reflect our commitment to quality, transparency, and customer satisfaction—so you can confidently choose us for your next remodeling or construction project.
GOOD Based on 96 reviews Paco Martillo2025-04-21Trustindex verifies that the original source of the review is Google. Navigating the recovery process after the Southern California floods has been an incredibly stressful experience, and unfortunately, my dealings with Hi-Tech have only compounded those difficulties. What was initially presented as a straightforward repair project following the May 2022 flood has devolved into a protracted nightmare spanning nearly three years. Despite an insurance-approved bid and an initial three-month timeline, my home remains in a state of disrepair, with essential bathrooms still lacking fixtures and a kitchen that was supposedly "redone" now presenting a host of new issues. The contractual process with Hi-Tech also left me with significant concerns. I was asked to sign a second, non-itemized contract before work would commence, with assurances that this wouldn't lead to additional out-of-pocket expenses. Trusting in their professionalism during a vulnerable time, I signed. However, upon returning to my home after twelve months of displacement, the reality was far from the promised restoration. The work completed was substandard, with chipped tiles, excessive grout, and non-functional bathrooms. Furthermore, appliances were damaged, electrical work was faulty, and even structural elements like my kitchen island were poorly concealed rather than properly repaired. Beyond the shoddy workmanship, there were alarming financial and ethical issues. Significant amounts of unused materials were charged to my budget, items covered by insurance were trashed with no reimbursement, and crucial elements of the original quote were never completed. Attempts to address these issues with the owner were met with unprofessional and hostile behavior, ultimately leading to them abandoning the project entirely in April 2024. While a complaint filed with the Contractor's License Board resulted in a "write-up," this offers little solace for the extensive and costly repairs I now face. Based on my experience, I would strongly advise anyone considering Hi-Tech to exercise extreme caution. quinn englebert2025-04-03Trustindex verifies that the original source of the review is Google. I worked with Hi-Tech Builders on an extensive remodel for an older property in Santa Monica. This was my first remodel I’ve done, and my advice to everyone is that selecting the right contractor is an extremely important aspect of a remodel! It might be the most important aspect. Simply put, Hi-Tech went above and beyond my expectations, and I would recommend them to anyone looking to do a remodel. This was a serious project with plenty of permits that required a lot of construction expertise. They delivered. My project manager, Erick (Frederick), did a fantastic job. The plans included a partial take down of a load-bearing wall, an entirely new kitchen, hook-ups for a washer/dryer, gas line change, flooring repair, significant electrical work and panel upgrade, new dual zone mini-split system, among other things. In short, it was a big undertaking by the entire Hi-Tech team. There are numerous details in a project of this size. Additionally, their pricing is reasonable in the construction and remodel market, and I interviewed several other contractors at the beginning of this project. I felt most confident in Hi-Tech and selected them. I made the right call. I worked primarily with Erick (Frederick), who is one of their project managers. I also worked with Shay (project manager), and Karen/Henia as their support staff. Erick was really a value-add to this project – as another review mentions, I was also impressed by his dedication to my project. He has a lot of great qualities that make him an exceptional project manager: responsive, communicative, his attention to detail, and an overall expert in construction work. He’s also just a good guy in general and wants to do right by his clients. I always felt supported and confident with him as my project manager. If something came up, as things will in a remodel, we always talked about it and came to a solution. Not once was I disappointed by the result. Erick also understands things come up during a project of this scope. I feel as though he and I have been in almost constant communication for over a year. Additionally, the whole Hi-Tech team is full of nice, kind people to work with and who are also really good at what they do. We communicated extensively on Whatsapp, as well as phone and email. Erick also came by the job suite numerous times to check on progress, and to meet with me. A few examples that stick out to me, highlighting the quality of the work and service they provided: Early in the project, Erick proposed a layout change for the kitchen cabinets that ended up making a real, positive impact in the end -- advising me on the selection of a trash pullout cabinet and lazy susan, and finding a way to center the range/hood. I raised some concern initially with a new wall, and Erick came by to address my concerns and found a way to adjust it with some additional work. I was happy with the result. The work was done the right way, and the city inspections were all passed and completed by the end of the project. They didn’t cut any corners. Hi-Tech hired a 3 person, deep-cleaning service at the end of my project. I had several, detailed questions regarding an electrical panel and Shay took my call late in an evening to address my concern. I also had an issue with Home Depot’s countertop contractor, and Shay took time out of his day to hear my issue and talk through the situation Really, I cannot say enough positive things in working with Erick - he is a great guy to work with, and I could not ask more of someone in a project manager position. Shay as well. Small details make a difference the end, and Hi Tech / Erick made it a priority to make sure I was satisfied with the project. The quality of their sub-contractors is impressive as well: See the pictures for high quality work! In summary, if I were ever to remodel again in the Los Angeles/Orange County Area, Erick would be the 1st person I call. All in all, it’s been a great experience with Hi Tech. jaimie calderon2025-02-07Trustindex verifies that the original source of the review is Google. My husband and I recently completed a remodel of our 1920s Craftsman home with Hi-Tech Builder, and we couldn't be happier with the results. We wanted a renovation that would last for another 100 years, and after researching various companies, we chose Hi-Tech based on their stellar reviews and impressive portfolio. Over the course of 14 months, they transformed our 2-bedroom, 1-bath home into a beautiful 3-bedroom, 2-bath residence. From the start, we felt a personal connection with Sam, who came out to discuss our project. His follow-up visit with company owner David helped establish trust and made us feel valued as clients. We appreciated the collaborative process as we discussed various options for expanding our existing home rather than opting for a demo and rebuild. Communication was excellent throughout this phase, and they assisted us in securing financing and choosing a design plan that aligned with our budget. The demolition phase went smoothly, but we did encounter some challenges as we neared completion. There were a few miscommunications, particularly when our project manager was swapped out. While this created some continuity issues, the way Hi-Tech handled these random setbacks left us feeling satisfied overall. Pros: - Personalized care from the foreman and project manager. Sam and Erik ensured we felt heard and addressed any concerns promptly. - Professional company with high-quality work. - Excellent communication from the front office. Karen was always quick to respond and kept us updated. - A special shout-out to our electrician, Leo, for his great work! Cons: - The project manager switch resulted in some inconsistency in communication. - There was a miscommunication regarding the home being ready for move-in, as the cleaning crew did not show up. While this wasn’t directly Hi-Tech's fault, it was an inconvenience. For anyone planning a renovation, I recommend keeping track of changes and agreements in a shared document with your team to ensure everyone is aligned on expectations. Thank you, Hi-Tech Builder, for creating our dream home! We've already recommended you for two additional projects. jose martinez2024-12-11Trustindex verifies that the original source of the review is Google. I want to say thank you to Hi-Tech Builders, Carlos M. , Ms.Bhey and the contract team who excelled in the expectation of my bathrooms. They definitely had seven months of patience dealing with me and the home insurance. Needless to say, Carlos and his team had everything dialed in and delivered. I can’t stress it enough how clean and simple two bathrooms can be amazing. Looking forward to working with Carlos M. and his team again for future projects coming up. Thank you Chris Galvan2024-11-11Trustindex verifies that the original source of the review is Google. Hi-Tech Builders are a great company to work with. The attention that they give is second to none. Carlos and Bhey are super easy to work with and they go above and beyond. The communication is very clear and detailed. The turn around of the work needed is super quick and professional, we had a living room, hall way and two rooms redone with new flooring, within 3 days, everything was done. The value you get is well worth the investment with Hi-Tech Builders, the communication is great, the work is amazing and they will make sure it is up to what was expected. Full recommendation and look forward to using them again in future projects. Mary A2024-10-14Trustindex verifies that the original source of the review is Google. Hi-Tech did a great job in rebuilding our downstairs after a slab leak. Carlos paid attention to detail and consulted us all along the way. They used quality workers, kept an eye on the progress, and communicated often. The job was completed better than I envisioned. Michael Tu2024-09-26Trustindex verifies that the original source of the review is Google. We had a very good experience with Hi-Tech Builders. We had an insurance claim with water damage. Carlos was very patient and detail oriented from the very beginning. He explained the whole process to us and the timeline. He made sure to check on the final work after each contractor. Even after the work is done (we signed off on the paperwork for completion), we had a minor issue with the faucet, he came over and fixed it quickly. Bhey at the front office was very attentive to our email inquiries too. We appreciate that Hi-Tech Builders restored our bathroom and living room after the water damage! Ruby Alcantara2024-09-06Trustindex verifies that the original source of the review is Google. I highly recommend Hi-Tech Builders to my friends and family. Kristina, I appreciate your commitment and dedication to customer like me. In fact, this is my 2nd time with Hi-Tech Builders. I’m happy and satisfied with the exterior painting you guys did. Lisa Wegner2024-09-03Trustindex verifies that the original source of the review is Google. I hired Hi Tech Builders do a renovation on my home in 2021. I was happy at the time, so I gave them a glowing review on Google. I even agreed to do a video testimonial for them. Now, three years later, I'm discovering issues. They suggested that I have them replace my HVAC system. I agreed and we signed a contract. This replacement was separate from the renovation and done by a third party vendor that Hi Tech Builders hired. Firstly, they overcharged me, hugely. I was charged $22,500 for the HVAC system for my 1200 square foot, single-story home. Every source online that I checked says it should cost $5,000 to $12,000. The Forbes Home website stated that the average cost for an HVAC system is $10,000 or $15,000 for a “high-end" option. I paid $22,500 and it is definitely not high-end. I had to take out a second loan to pay for it. This past winter, the furnace they installed was making a loud whistling sound. I could hear it down the street while I walked my dog. It also kept turning off and on. A reputable HVAC specialist who was recommend to me by a friend checked it. He said that the gas valve was not adjusted correctly at the time of installation. The installer should have used a manometer. He said that I need to contact the installer and have them adjust it correctly. I emailed Hi Tech Builders to have them send out their vendor that did the installation. They refused, saying that the warranty period was over (3 years after the installation). However, the issue had nothing to do with a warranty. They needed to correct a mistake they made during installation. Hi Tech Builders offered to have their HVAC guy come out for a fee of $375, just to have the guy come to my house and assess the issue. Now it's summer. I had my air conditioner on, and the thermostat set for 72 degrees. It read 82-84 degrees consistently. My home was sweltering. I had a reputable HVAC company that I had used before come out. They found that the system was leaking refrigerant. The coil needed to be replaced. The technician stated that the part should have a manufacturer’s warranty for 8-10 years. He checked all of his sources. No one recognized the coil that was installed by the vendor hired by Hi Tech Builders. No manufacturer was found and the part was not registered in California. I had to pay $3700 for a new coil. A day or two after the coil was installed by the other HVAC company, the house was getting hot again. I called the company back, and the guy came out. He found several refrigerant leaks in the piping from the coil in the attic to the unit in the yard. The other HVAC company replaced all of that piping without charging me a dime. The guy stated that the piping used by the original installer (hired by Hi Tech Builders) was the wrong type. It was not flexible so it leaked at bends in the piping. Most of us are not rich, and most of us are not experts on all of the systems in our homes. We depend on the professionals that we hire to educate us on what is needed in our home, and do the work properly using the correct, quality parts and equipment. We also need to trust those professionals not to overcharge us for their work. Hi Tech Builders is not a company that we can trust or depend on for the work that is needed.