Explore Our Services

We offer a range of services to meet the needs of every client. Have something else in mind? We'd be happy to work with you to create a custom quote.

Your project, your terms.

At Westfield Development Group, we believe every client is different — and your project should be handled that way too. Some people come to us with a blank lot and a dream. Others already have plans in hand and just need someone they trust to pull the permits and break ground. And some just want a second set of eyes managing their contractor so nothing falls through the cracks.

That's why we built our services to be modular. You can hire us for a single phase, a few phases, or hand us the whole project from start to finish. No pressure. No upselling. Just honest work, clear communication, and a team that shows up.

We work on ADU and residential projects, and we take on commercial construction too — from tenant improvements to ground-up builds. And if financing is holding you back from getting started, ask us about our owner financing options.

However you want to work with us, we're ready to meet you there.

  • We create custom plans tailored to your lot, your vision, and your budget — whether it's a backyard ADU, a home addition, or a commercial build-out.

    What's included

    • Site evaluation and feasibility review — we assess your lot, zoning, setbacks, and what's actually buildable before you spend a dollar.

    • Schematic design and floor plan development — we translate your goals into a layout that works for your family, your property, and your budget.

    • Construction documents — full architectural drawings ready for permit submittal and contractor bidding.

    • Title 24 energy compliance and structural coordination with licensed engineers as needed.

    • Revisions and client review rounds built into the process — no surprise change order fees for normal design feedback.

    We design for ADUs, room additions, full custom homes, and commercial tenant improvements. If you're not sure what's possible on your property, start here — a quick feasibility call costs you nothing.

  • We handle all city and county permit applications, plan check responses, and inspections — so you don't have to deal with the red tape.

    What's included

    • Full permit application preparation and submittal to your city or county building department.

    • Plan check coordination — we respond to correction comments and keep the process moving so you're not waiting months for approval.

    • Coordination with the fire department, utility companies, and other agencies as required by your jurisdiction.

    • Scheduling and managing all required inspections during and after construction.

    • Final sign-off and Certificate of Occupancy procurement.

    Already have your plans drawn? We can take over from here and get them through the permit process. We know how LA and Orange County cities operate — and how to move things along when they stall.


  • Our team manages all trades from foundation to finish. We self-perform key scopes and subcontract the rest — keeping quality tight and timelines on track.

    What's included

    • Full project scheduling and site supervision — we run the job from day one so you don't have to babysit it.

    • Subcontractor sourcing, vetting, and management — we work with trusted trades we've used before and hold them to a high standard.

    • Material procurement and budget tracking — we give you clear cost updates throughout, not surprises at the end.

    • Quality control at every phase — we don't sign off on work that isn't right, even if it costs us time.

    • Inspection coordination and punch list completion through final sign-off.

    We hold a Class B General Contractor license and carry full general liability and workers' comp insurance. We work on ADUs, residential additions, and commercial projects throughout LA and Orange County.

  • Already have a contractor? We'll act as your owner's rep — overseeing schedules, budgets, and subs on your behalf so your project stays on course.

    What's included

    • Contractor vetting and bid review — we help you find the right contractor and make sure the contract protects you before you sign anything.

    • Weekly site visits and progress reporting — you'll always know what's happening on your jobsite, even if you're never there.

    • Budget and schedule monitoring — we track costs and timelines against the plan and flag problems early, not after they've become expensive.

    • Change order review — we make sure you understand what you're being asked to pay for and whether it's fair.

    • Dispute resolution and communication buffer — if there's friction between you and the contractor, we step in and handle it professionally.

    This service is ideal for owners who already have a relationship with a contractor but want a professional in their corner. We've seen what goes wrong when nobody's watching — this is how you make sure it doesn't happen to you.

  • Can't wait on a bank? We offer in-house financing options so you can start your project sooner. We'll walk you through what works best for your situation.

    What's included

    • Project cost review and financing structure consultation — we help you understand how much you need and what repayment looks like before you commit to anything.

    • In-house financing options for qualifying projects — we can fund the construction directly, which means faster starts and less paperwork than a traditional bank loan.

    • Flexible draw schedules tied to construction milestones — you're never paying for work that hasn't been done.

    • Referrals to trusted lending partners if in-house financing isn't the right fit for your situation.

    Owner financing isn't right for every project, but when it works, it can make the difference between a project that happens and one that sits on hold for years. Let's talk through your situation and see what makes sense.

Our Process

Plan with Purpose

We start by listening. We want to understand your property, your goals, and your budget before anything gets drawn or submitted. We'll tell you honestly what's possible and map out the smartest path to get there — no fluff, no overselling.

Collaborate Openly

Design is a conversation, not a presentation. We share ideas early, explain the tradeoffs, and build the plans together with you. You'll always know what's happening, what it costs, and why — nothing moves forward without your sign-off.

Build with care.

When construction starts, we run the job so you don't have to. We manage the schedule, the subs, and the quality control from day one. If something isn't right, we call it out — even when it's easier not to.

Deliver with pride.

We're not done until you are. We walk through the finished project together, close out every last item, and make sure what was built matches what we planned. We want to be the team you call next time.

  • "Creative, reliable, and genuinely passionate about what they do."

    Former Customer

  • "We needed a bridge loan to move fast. Westfield funded us directly within the week. No bank, no delays. We got the deal."

    Trần & Lê Holdings

    Commercial · Westminster

  • "Their attention to detail and commitment to quality truly stood out. We’ve already recommended them to others."

    Phạm & Huỳnh Group

    Mixed-Use · Anaheim

Let’s Work Together

If you're interested in working with us, complete the form with a few details about your project. We'll review your message and get back to you within 48 hours.