Licensed Home Addition Contractor · Statewide California
Home Additions
Across California
TDQ Construction builds structural home additions throughout California — room additions, second stories, master suites, and large multi-room expansions. Family-owned since 1987. Class A, B & C-8 licensed.
Why Add On?
Expand Your Home, Not Your Commute
In California's competitive real estate market, moving to a larger home often means a significantly higher mortgage, new transaction costs, and leaving an established neighborhood. A well-built home addition gives you the space you need while staying in the home and location you've already invested in.
TDQ Construction has been building structural additions throughout California since 1987. We bring the licensing, engineering knowledge, and field experience to handle every phase correctly — from permit drawings and foundation work to roofing and final finishes.
We serve all 123 cities in our California service area. Select your city below for local pricing and permitting guidance.
What We Build
Every Addition Type, Every City
Ground-Level Room Addition
Expand your home's footprint outward — new bedroom, family room, office, or living space tied structurally to your existing foundation.
Foundation extension requiredSecond Story Addition
Build up instead of out — ideal for smaller lots where you want to maximize square footage without sacrificing yard space. Requires full structural engineering and load analysis.
Full structural engineeringMaster Suite Addition
A dedicated primary bedroom, walk-in closet, and en-suite bathroom — added as a ground-level or second-story wing. One of the highest-ROI additions available.
Most requested addition typeGarage Addition
Attach a new garage to your home or expand an existing one — structural work, foundation, and all utility connections handled entirely in-house.
Lower civil costSunroom / Patio Enclosure
Convert an existing covered patio or deck into a fully conditioned living space — adding usable year-round square footage at a lower cost than a full structural addition.
Fastest to permitMulti-Room Expansion
A large-scale addition that adds multiple rooms or an entire new wing — often combining a primary suite, family room, and utility space under one coordinated project.
Complex structural scopeWhy Choose TDQ
Structural Additions Done Right the First Time
A home addition is one of the most structurally complex projects a homeowner can undertake. It involves tying new construction into your existing foundation, framing, roof, and utilities — work that demands real engineering knowledge, not just finish carpentry experience.
TDQ Construction has managed complex structural additions throughout California since 1987. We hold the licensing and experience to handle the full scope — including the civil and structural components most remodel contractors cannot legally perform.
Discuss Your Home AdditionStructural Engineering Capability
Home additions always involve structural changes — foundation extensions, load-bearing wall modifications, and roof tie-ins. TDQ's Class B license and hands-on structural experience ensures every addition is engineered correctly and built to California code.
Foundation & Civil Authority
Extending a foundation or running new utility connections for an addition requires civil construction authority. TDQ's Class A General Engineering license allows us to handle all below-grade and civil work in-house — keeping your project on schedule.
One Contractor, Full Scope
From permit drawings and foundation work to framing, roofing, MEP, and finishes — TDQ manages every phase under one license and one point of contact. No coordination gaps between separate contractors.
Built for Resale & Long-Term Value
We approach every addition with resale value in mind — proper permits, code-compliant construction, and quality finishes that appraise well and hold up over decades.
FAQs
Common Home Addition Questions
Every property is different. Call us to discuss your specific situation.
(714) 357-1608Free Estimate
Ready to Start Your Home Addition?
TDQ Construction provides detailed written estimates before any work begins. Select your city below or call us directly to discuss your property and project goals.
Send Us a Message
Service Area
Home Additions in Your City
Select your city for local pricing information, permitting guidance, and a free estimate from TDQ Construction.
202 cities across California · Don't see yours? Call us — we serve all of California.