Top-Rated
Home Remodeling in Diamond Bar
A modern kitchen adds functionality, comfort, and value to your home. Our team at Horizon is full of fresh ideas and will manage your project according to your requirements. Our priority is to provide you the benefits of a beautiful high standard kitchen along with energy efficient kitchen space.
If you are planning a complete bathroom remodel, want to change your tub shower, update your plumbing fixtures or make the space more efficient. Our team at Horizon will help you through the process with expert advice, professional craftsmanship and affordable options with beautiful results.
Transform your space with our expert interior work services. We offer a comprehensive range of solutions, from space planning and design to the selection of finishes and materials. Our team of experienced professionals will work closely with you to create a space that is both functional and stylish, tailored to your specific needs and budget.
At Horizon, we believe that your home is more than just four walls. It’s the place where you create memories with family and friends, a place where you can relax and enjoy life. That’s why we offer a wide range of exterior work services to help you transform your vision into a dream yard.
Need more space for business, entertainment, or to enhance your home’s value and functionality? Adding new rooms or features like an outdoor kitchen requires expert architectural design to integrate modern amenities seamlessly. Our experienced team integrates modern amenities to complement your vision.
Horizon Construction & Remodeling staff of experts includes a professional designing division working alongside an architect and engineer. We will provide you with a complete plan, blueprints & permits by your city so you don’t waste your precious time.
Kitchen Remodeling In Diamond Bar
Many Diamond Bar kitchens date to the tract-home era and were built with compartmentalized floor plans that no longer suit the way families cook and gather. Our kitchen remodeling services address layout, cabinetry, countertops, and storage within the constraints of your graded pad footprint. For design ideas before your consultation, browse HGTV Kitchen Ideas.
Bathroom Remodeling In Diamond Bar
A dated builder bathroom can hold back the rest of your home. Our bathroom remodeling solutions cover vanities, fixtures, tilework, and layout changes for both primary suites and smaller secondary baths. Before we meet, you can review current styles and finishes at Houzz Bathroom Remodel Ideas.
Interior Remodeling In Diamond Bar
Tract homes in areas like Summitridge and Sycamore Canyon were built with fixed wall configurations that often feel cramped today. Our interior remodeling work covers open-plan conversions, staircase updates, and layout changes that improve how your home actually functions day to day. Broader design thinking is available at Architectural Digest.
Exterior Remodeling In Diamond Bar
Hillside homes along Diamond Bar Boulevard and into The Country Estates face weathering conditions that can age siding, stucco, and trim faster than flat-lot homes. Our exterior remodeling expertise spans siding, stucco, trim, and hardscape work suited to those exposures. Additional guidance on exterior upgrades is available at This Old House – Exterior Upgrades.
Room Additions & ADUs In Diamond Bar
Adding space on a hillside pad requires careful attention to slope, drainage, and retaining conditions before a plan goes to the City of Diamond Bar Building and Safety Division. Our room additions and ADUs are scoped with those site realities in mind, whether the goal is a guest suite, a home office, or rental income. State-level rules are outlined in California’s HCD ADU Guide.
Garage Conversions In Diamond Bar
An attached garage on a tract home can often be converted into usable living space without disturbing the pad or the slope behind it. Our garage conversion projects produce guest suites, home offices, and gyms that meet city code and insulation requirements. Layout possibilities are worth exploring at Houzz Garage Conversions.
Outdoor Living Spaces In Diamond Bar
Hillside backyards in Diamond Bar can be compact, but a well-planned patio, pergola, or BBQ island makes that space genuinely usable for outdoor gatherings. Our outdoor living features are designed around your lot’s grade and usable area so nothing feels forced onto the slope. For layout and material ideas, see Better Homes & Gardens – Outdoor Spaces.
Flooring & Painting In Diamond Bar
Older Diamond Bar homes often have original flooring that has worn through decades of use and may sit over subfloor conditions worth addressing before new material goes down. Our flooring services include hardwood and luxury vinyl plank options, and our painting services cover interior and exterior surfaces with finishes suited to Southern California sun and temperature swings.
Window & Door Installation In Diamond Bar
Single-pane windows installed during the original tract construction era do little to manage heat gain on south- and west-facing hillside elevations. Our window and door replacements use energy-efficient units that improve comfort and support California Title 24 compliance. Performance benchmarks for residential windows are posted at Energy Star – Windows.
Home Remodeling Construction and Design Services in Diamond Bar
Home remodeling in Diamond Bar starts with understanding what the city’s housing stock actually demands from a contractor. Most of the homes here went up between 1959 and the city’s 1989 incorporation, built as tract houses on graded hillside pads across areas like Summitridge, Sycamore Canyon, and The Country Estates. That construction history shapes nearly every project we take on, because the pad footprint and the slope behind the house determine where a kitchen can expand and what a floor plan change can realistically accomplish.
Hillside conditions above Diamond Bar Boulevard add another layer of complexity. Slope, drainage, and retaining situations have to be assessed before design begins, because those factors decide what an addition can structurally support and where it can go. We work through that analysis early so that drawings reflect what is actually buildable on your specific lot. All permits for this work are pulled through the City of Diamond Bar Building and Safety Division, and we manage that process from application through final inspection.
Two additional rules apply to most older homes here. Properties built before 1978 fall under federal lead renovation requirements, and California’s own lead-in-construction standard tightened on January 1, 2025, setting a permissible exposure limit of 10 micrograms per cubic meter along with monitoring, medical surveillance, and written notification for triggering tasks. On additions, California Health and Safety Code section 17958.8 generally allows original compliant materials and methods to remain without requiring a full upgrade to current code.
You
Deserve the Home of Your Dreams in Diamond Bar
High Quality home remodeling In Diamond Bar
Horizon, your licensed contractor delivers high-quality work on time & within budget, ensuring a seamless remodeling experience.
the latest home remodeling, construction & home design industry innovations
At the forefront of industry trends, setting the standard in style and design.
our integrity and guarantee to homeowners In Diamond Bar
Horizon is your trusted partner in transforming spaces for over 18 years. We bring innovative approach to crafting homes that reflect your unique vision.
Project updates provided to you every step of the way
Delivering quality & timely projects with a team of skilled professionals.
Our Process
Designing & Remodeling Your Home in Diamond Bar: Our 5-Step Process
Initial Consultation
In Your Environmet
Initial Consultation
In Your Environment
Setting Goals &
Establishing Priorities
Setting Goals &
Establishing Priorities
Customized
Design Creation
Customized
Design Creation
Planning &
Acquiring Permits
Planning &
Acquiring Permits
Transformative
Construction
Transformative
Construction
Professional Design & Personal Attention from Start to Finish
Why Choose Horizon Remodeling For Home Remodeling in Diamond Bar
Running design-build means the drawings, structural engineering, permit applications and construction all move through one company on a single schedule. For a home remodeling project in Diamond Bar, that matters because plan check at the City of Diamond Bar Building and Safety Division can involve slope, drainage and retaining reviews on top of the standard residential submittal. Keeping everything under one roof reduces the back-and-forth that slows projects down.
Before you set a budget, one detail is worth knowing: school facility fees apply to a residential addition only when it adds more than 500 square feet of assessable space. A garage, patio, covered walkway or detached accessory structure does not count as assessable space. Many of the builder tract homes on graded hillside pads in areas like Summitridge and Sycamore Canyon fall right at that threshold, so it is a number worth confirming early.
Our showroom at 614 S Euclid St in Fullerton carries full kitchen and bath displays along with material samples. The project manager who would run your job is the same person who walks the house with you at the start.
Showroom & Home Remodeling Services in Diamond Bar
For home remodeling materials and planning support, Horizon Construction & Remodeling Inc. operates a design showroom at 614 South Euclid Street in Fullerton, reachable by phone at (714) 449-9035, with parking available behind the building. The showroom carries a wide range of building materials at warehouse pricing, covering kitchens, bathrooms, garage conversions, home offices, additions, windows, doors, flooring, lighting, and exterior work. For Diamond Bar homeowners working with hillside pad foundations common across neighborhoods like Summitridge and Sycamore Canyon, selecting the right materials early helps keep the project moving smoothly.
Horizon Construction & Remodeling serves homeowners across a wide stretch of Southern California, and home remodeling in Diamond Bar is a regular part of that work. Our service area takes in cities throughout Los Angeles County, Orange County, San Bernardino County, and Riverside County, so coordinating permits, subcontractors, and site logistics across the region is something we handle routinely.
In Los Angeles County we work in communities from Long Beach and Torrance on the coast to Claremont and Glendora at the base of the San Gabriel Mountains, along with dozens of cities in between, including Pasadena, Glendale, Burbank, and Whittier. Diamond Bar sits within that same county framework, which means permits go through the City of Diamond Bar Building and Safety Division, a process we are familiar with from working throughout the area.
Most of the homes we remodel in Diamond Bar are builder tract houses constructed between the late 1950s and the city’s 1989 incorporation. Those homes sit on graded hillside pads, and any kitchen layout change or floor plan alteration has to respect the pad footprint and the slope conditions directly behind the structure.
Our Orange County work covers cities from Anaheim and Fullerton down through Mission Viejo and San Clemente, and we also take on projects in Chino Hills and Montclair in San Bernardino County and Corona in Riverside County. Wherever the project is, the coordination process stays the same: one contractor managing the full scope from start to final inspection.
View Our Home Remodeling Areas of Service
Explore More in Diamond Bar
Horizon is a licensed Class B general building contractor serving Diamond Bar and the surrounding Los Angeles County communities.
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Our Services
Ask Us Anything
How long has Horizon been in the construction industry?
Horizon has proudly served customers in the construction and remodeling industry for over 18 years, bringing expertise and quality to every project.
What sets Horizon apart from other construction companies?
Our family-owned company is committed to honesty, integrity, and excellence. We blend dedication, experience, and passion to deliver quality, timely, and profitable projects.
How does Horizon ensure quality work?
We uphold the highest standards by employing licensed contractors, maintaining a solid work ethic, and staying current with industry innovations. Quality is our commitment.
Does Horizon provide services in specific regions?
Yes, Horizon is proudly serving customers in Los Angeles, Orange County, San Bernardino, San Diego counties, and surrounding areas ensuring accessibility to various communities.
Can I schedule a consultation for my home improvement project?
Absolutely! Call (714) 449-9035 to schedule a consultation or visit our Horizon Design Center Showroom for personalized assistance.
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Are You Ready to Get Started on Your Project? Hire Horizon Remodeling for Home Remodeling in Diamond Bar
