The Leading ADU Design-Build Firm in Oceanside
From backyard cottages to income-generating rentals, Home Services Plus creates ADUs that are fully permitted and move-in ready. Our unique prefab + custom approach ensures faster timelines, better design, and a stress-free experience.
Backyard ADU Construction in Oceanside
Our detached ADUs range up to 1,200 sq. ft. and feature complete kitchens, baths, and private utilities. Whether for family, tenants, or property value, we create backyard homes that fit your lifestyle.
Turnkey Prefab ADUs
Designed for speed and convenience, our prefab ADUs come with curated finishes, optional upgrades, and an accelerated build process. We handle permits, prep, and connections — you get a complete home ready to use.
Smart Garage-to-ADU Solutions
Our team designs garage conversions that maximize space and function. With insulated interiors, kitchenettes, and modern finishes, JADUs are a smart way to add value and versatility to your property.
Safe & Comfortable ADUs for Aging in Place
From roll-in showers and walk-in tubs to ramps and comfort-height toilets, our ADA-compliant ADUs provide both safety and style for independent living.
Oceanside ADU Builders – Why Clients Choose Home Services Plus
How We Build Your ADU
Consultation & Property Review
We start by reviewing your property, checking zoning rules, and recommending the best ADU option — detached, garage conversion, or prefab.
Design & Planning
Our team creates detailed construction drawings, 3D renderings, curated finish selections, and cost breakdowns so you can choose the plan that fits your vision and budget.
Permitting & Engineering
We manage everything — from coastal reviews and hillside engineering to city and HOA approvals — keeping your project on track without the headaches.
Site Preparation & Utilities
From excavation and foundation work to utility connections, we prepare your lot while minimizing disruption to your existing home.
Construction & Interior Completion
Our licensed crew handles framing, roofing, plumbing, electrical, and interior finishes. Every ADU is built cleanly, efficiently, and fully up to code.
Final Walkthrough & Handover
We walk the finished space with you, complete all inspections, and provide warranty documentation — leaving your ADU fully move-in ready.
What Does an ADU Cost in Oceanside?
Here’s an overview of common ADU project costs by size and type:
| ADU Type | Shell Price | Site Work | Permits & Fees | Total Est. Range |
|---|---|---|---|---|
| 600 sq ft (1-Bed) | $189K | $35K | $12K | ~$236K |
| 1,000 sq ft (2-Bed) | $279K | $45K | $14K | ~$338K |
We provide flexible solutions for homeowners and investors, ranging from fully custom builds to cost-efficient prefab models.
See Our ADU Projects in Oceanside
Oceanside Homeowner Stories: ADU Projects
Meet the Team Behind Oceanside ADU Builds
Visit Our Oceanside Showroom
Home Services Plus – Oceanside Showroom
Begin Your ADU Project Today
Transform your unused garage or backyard into a functional, stylish ADU that adds value and generates income. Book your free consultation today.
Frequently Asked Questions
Prefab models are ideal for efficiency and budget control, while custom ADUs are best for homeowners wanting unique layouts, premium finishes, and property-specific design.
From folding glass walls and spa-like bathrooms to chef-inspired kitchens and smart HVAC, luxury ADUs blend elegance with function — creating a second home that complements your primary residence.
Luxury ADUs generally require 7–11 months from start to finish, depending on complexity. Prefab models accelerate the process, reducing design and build time significantly.
Prefab ADUs are a smart option if you value speed and budget control. Just note that customization is more limited than with a fully tailored build.
