DIAMOND BAR CUSTOM HOME BUILDER & GENERAL CONTRACTOR
Built With Intention. Hillside Homes, Canyon Edges.
DIAMOND BAR HOMES ARE BUILT DIFFERENTLY
Heart Construction is a general contractor serving Diamond Bar, specializing in custom homes, full renovations, and hillside and canyon-edge builds. We work with homeowners, architects, engineers and designers through organized pre-construction, transparent budgeting and steady execution. The founder is on your first call, so you know who is accountable.
In Diamond Bar, slope sets the rules.
Second stories and any addition that enlarges your house by more than half need Planning Commission approval through the City of Diamond Bar Community Development Department, and some smaller second-story additions do too. We check zoning and that threshold first, so you know early whether a hearing is ahead.
Hillside management with conditional use permit review, fire hazard zone rules and public notice to nearby neighbors stack on top of that. That is why sequencing matters: geotechnical and civil input come before design, not after.
We guide the process so every decision feels informed, not reactive, from feasibility through closeout.
Near Heritage Park and Summitridge Park, we take on second-story additions and full remodels, custom rebuilds, and ADUs and garage conversions. Whatever the scope, we bring the same structure and discipline we apply across the San Gabriel Valley and every project in Los Angeles.
RECENT PROJECTS
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![Malibu Pier home interior featuring a warm modern living space with built-in seating, layered textures, custom wood furniture, and an open layout flowing into a minimalist kitchen, showcasing Heart Construction’s intentional coastal design.]()
MALIBU PIER
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![Pacific Palisades ocean-view backyard with custom pool, palm trees, lounge seating, and manicured lawn overlooking the Pacific coastline.]()
MALIBU
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![Marina del Rey home interior with warm modern design featuring a natural wood dining table, sculptural pendant lighting, plaster walls, and an open kitchen with custom cabinetry, showcasing Heart Construction’s intentional coastal craftsmanship.]()
MARINA DEL REY
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![Open-concept living room in a Hollywood Hills home remodel with folding glass walls, custom built-ins, soft neutral furnishings, and seamless indoor-outdoor flow overlooking canyon views, showcasing Heart Construction’s warm modern design.]()
HOLLYWOOD HILLS
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![Pacific Palisades luxury bathroom with freestanding soaking tub, marble walk-in shower, herringbone tile walls, and sculptural glass chandelier framed by natural light and greenery views.]()
BRENTWOOD
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![Pacific Palisades modern custom home with smooth stucco façade, black-framed windows, vertical wood garage door, and drought-tolerant landscaping.]()
MAR VISTA
OUR REMODELING SERVICES
At Heart Construction, we specialize in creating thoughtfully designed homes that reflect the way you live. From custom ground-up builds to full-scale renovations and refined living spaces, we guide every project with craftsmanship, clarity and care for homeowners in Duarte, Covina, East Pasadena and beyond.
OUR CONSTRUCTION COMPANY DIAMOND BAR PROCESS
PLAN
First a Strategic Visioning Session: A conversation about your goals, budget and timeline, and a frank read on what your Malibu site will allow. Complimentary.
TEAM
Second we assemble the architect, structural and geotechnical engineers, civil engineer, biologist and designers your project needs — matched to your style and site's constraints.
CALL
Third a Professional Services Agreement and a small retainer begin feasibility, permitting strategy, design coordination and line-by-line budgeting.
PERMITS
We assemble and file the complete CDP and building-permit package, coordinate Fire and Environmental Health reviews, and lock scope, finishes and schedule before groundbreaking.
CONSTRUCTION
Milestone-based build. Change orders are priced and approved in writing before work begins. You get a weekly update every week — progress, decisions needed, what's next.
CLOSEOUT
Finally Walkthrough with Final inspections, punch list, documentation and warranty handover. Payments are tied to completed milestones, never arbitrary percentages.
After you contact us, Within one business day, Asaf will call to understand your property and goals. If it's a fit, we schedule a site visit. There's no obligation and no pressure — just a clear picture of what's possible.
What to Know Before
You Build in Diamond Bar
Planning Commission meetings and plan-check cycles set the pace in Diamond Bar, and the City of Diamond Bar Community Development Department runs both. Routine permits take 3–6 months; projects that need a hearing or hillside review take 6–12 months. Design review adds time where it applies. Construction of a custom home runs 10–16 months. Early feasibility, before the design is locked, protects your schedule more than anything else.
What It Costs
Costs reflect sloped lots, aging 1970s structures and fire-zone details on a median home value near $900,000. Custom homes typically run $500–$750+ per sq ft; whole-home renovations $325–$600+ per sq ft; detached ADUs $250,000–$450,000+; pools $120,000–$300,000+. Soft costs — design, geotechnical and civil engineering, fire-zone and hillside studies, permits — are additional. You receive a line-by-line budget before construction begins.
Permits, Rules & Fire Codes
The City of Diamond Bar Community Development Department reviews your plans. Additions that enlarge the house by more than half need Planning Commission approval, smaller additions go through plot plan review first, and hillside lots face development review and a conditional use permit. Fire-zone construction standards and residential sprinklers are our base specification, not upgrades. We sequence all of this from feasibility, with a single point of contact, so design decisions are made with the constraints known.
Where We Build in Diamond Bar
Stonegate, Willow Heights, Montefino, Clear Creek Canyon, Diamond Hills, Green Bel, Pathfinder, Diamond Point, Diamond Ranch — across flat tracts and hillside canyons. Diamond Ranch and Stonegate are hillside, newer-era areas where slope and grading tend to drive the work, while Diamond Hills and Pathfinder are established neighborhoods where older stock usually points toward additions and remodels. Not sure which rules apply to your parcel? A feasibility review answers that in two to four weeks.
Meet the Builders Behind Your Project
Asaf Bar-Hen — Co-Founder & Developer Asaf leads design and development from concept to completion. His background spans 15 years in hospitality design, seven years in renewable energy and energy-efficient building, and real-estate work across the U.S., Asia and Central America. He leads every first call and brings a sustainability lens that aligns naturally with Malibu's coastal and fire-resilience standards.
Jason Aizenberg — Co-Founder Jason runs the operational side of every project — permits, design meetings, scheduling, subcontractor coordination and site logistics. Clients describe him as the person who "managed everything so we could focus on our family.”
California Contractors State License Board #1146456 — Class B General Building Contractor. Verify on CSLB ↗
25+ years of combined experience across high-end residential construction in Los Angeles
Frequently Asked Questions
About Renovation in Diamond Bar
Need approval for a second story?
Some second-story additions, and every addition that enlarges the house by more than 50%, need Planning Commission approval. Smaller additions of 301 sq ft or more go through plot plan review first. We check zoning and that threshold before design begins — see what a second story actually requires — so you know early.
How long do approvals take?
Routine plan check typically runs 3–6 months through the City of Diamond Bar; projects that need a hearing or hillside review run 6–12 months. Plan-check cycles run 15 working days, then 10 for resubmittals, so complete drawings matter. The city's pre-approved ADU plans can shorten design when they fit your lot.
Cost to build in Diamond Bar?
Custom homes typically run $500–$750+ per sq ft. Sloped lots, grading and foundation work, and fire-zone exterior details push toward the upper end. Soft costs — design, geotechnical and civil engineering, permits — are additional. You receive a line-by-line budget before construction begins.
Is my home in a fire zone?
Possibly. The State Fire Marshal's 2025 maps now include a Diamond Bar map, and properties in high or very high zones may be subject to Chapter 7A construction rules and defensible-space requirements. We build to that standard where it applies and plan exterior and landscape details accordingly from the start.
Are you licensed and insured?
Yes. Heart Construction holds California Contractors State License Board license #1146456 and is bonded and insured for large-scale residential construction, major remodels and structural work. You can verify the license on the CSLB website.
Guides for Diamond Bar homeowners:
- Cost to Build a Custom Home in Los Angeles (2026)
- ADU Los Angeles: Is It Right for Your Property?
- Custom Home vs Remodel vs Rebuild in Los Angeles
Nearby areas we serve: Duarte · Covina · East Pasadena · Citrus · East San Gabriel · Charter Oak
Region: All San Gabriel Valley communities we serve · Everywhere we build