California-licensed ADU specialist contractor based in Aliso Viejo. CSLB #1120497, class B| C10. Identified in our directory because the business name explicitly contains an ADU keyword.
The data below is a snapshot of the CSLB Public Data Portal as of April 28, 2026. Status can change at any time (suspension, expiration, revocation, change in classifications, bond amount changes). Always click through to the CSLB Instant License Check above before signing any contract — that's the authoritative source, not us.
| License number | #1120497 |
|---|---|
| Business name | Rad Modular Construction |
| Primary status | CLEAR |
| Classification(s) | B| C10 |
| Business structure | Sole Owner |
| Issued | 2024-05-08 |
| Expires | 2028-05-31 |
| Mailing address | 26791 ALISO CREEK ROAD1112, Aliso Viejo 92656 |
| Phone | (949) 339 8510 |
| Contractor's bond | $25000 |
| Workers' comp coverage | Exempt |
Rad Modular Construction has held a CSLB class-B licence for 2 years (since 2024). Newer entrant — ADU specialist market has seen rapid licensing growth post-2017.
Business structure: Sole Owner. Sole-proprietor contractors carry personal liability for the work. Lien-recovery and CSLB-arbitration outcomes attach to the individual rather than a separate corporate entity.
Contractor's bond posted: $25,000 — the California statutory minimum for class-B contractors. Standard for the industry.
Workers' compensation coverage: Exempt. This typically means the firm has no W-2 employees and operates with the owner-operator alone (or with subcontractors who carry their own coverage). California requires W-2 employees to be covered. If this builder grows mid-project and hires staff, they must obtain coverage before those employees begin work.
A California class-B (General Building) contractor licence authorises the holder to take on building projects requiring at least two unrelated trades — framing + electrical, or concrete + plumbing + framing, etc. Almost all ADU work qualifies because an ADU is by definition a complete dwelling and requires multiple trades. A single-trade contractor (class C-10 electrical, C-36 plumbing, etc.) cannot prime an ADU project as general; they must subcontract under a B-licensed prime, or the homeowner must act as their own owner-builder.
This is a necessary condition, not a sufficient one. ADU construction has specific code requirements (Title 24 energy compliance, fire sprinklers in most jurisdictions, soils reports on sloped lots, accessibility provisions for JADUs) that not every B-licensed contractor has experience with. Ask for at least three completed ADU project references before committing.
Before signing a contract with Rad Modular Construction or any builder, verify each of the following independently:
BackyardADU is an independent reference site. Rad Modular Construction has not paid us to be listed. We do not endorse, rank, or vouch for the quality of any contractor's work. The profile above is derived from public CSLB Public Data Portal data (April 28, 2026 snapshot) and is provided as a starting point for your own diligence. The CSLB Instant License Check linked above is the authoritative source for current status.
If you're Rad Modular Construction and want to update or remove this profile, contact hello@backyardadu.net. We respond to verifiable owner requests within 24 hours.