Sunrooms in Sunnyvale, TX

Four-season sunrooms — insulated, HVAC-ready, permitted, and built as a true year-round living space.

Sunroom additions in Sunnyvale provide climate-controlled year-round outdoor living space — a functional upgrade for families who want more usable square footage without the full cost of a traditional room addition. Three-season and four-season (fully insulated, HVAC-connected) sunroom configurations are both active scopes here. We design and build sunroom additions throughout Sunnyvale with Town of Sunnyvale permit handling, foundation work suited to clay soil, and all framing through finish under one contract. Call (469) 721-0146. Response within 1 business day.

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Scope of Work

01Foundation and slab design
02Framing, windows, and exterior finish installation
03Insulation and vapor barrier
04HVAC duct extension or mini-split rough-in
05Interior finishes — flooring, paint, and trim

Why i30 Builders

01Fully permitted addition — Certificate of Occupancy included
02Insulated walls and ceiling for year-round HVAC efficiency
03HVAC extension or mini-split options coordinated in-house
04Interior finishes matched to your home's existing aesthetic

Sunnyvale projects often span wider property footprints than typical suburban lots — longer fence runs, more hardscape square footage, and outdoor structures sized to take advantage of the extra yard. We scope accordingly and don't size projects to a cookie-cutter suburban template.

How It Works

01
Design & Plan
We assess your existing slab or design a new foundation, discuss window systems and HVAC requirements before quoting.
02
Permit & Structural
Sunrooms are additions that require building permits and structural review. We manage all submissions and engineering coordination.
03
Build
Foundation, framing, windows, insulation, HVAC rough-in, and interior finishes installed by our in-house team.
04
CO & Walk
We coordinate Certificate of Occupancy for the addition and walk the finished room with you before sign-off.

Sunrooms FAQs for Sunnyvale

How much does a sunroom addition cost in Sunnyvale?

A three-season sunroom in Sunnyvale (screened and glazed, not HVAC-connected) runs $28,000–$55,000 depending on size and finish. A four-season sunroom with full insulation, HVAC extension, and finished interior runs $45,000–$90,000+ depending on size. We provide a detailed scope-based estimate after an in-home walkthrough.

Does a sunroom addition require a permit in Sunnyvale?

Yes — sunroom additions are classified as structural home additions and require a building permit from the Town of Sunnyvale along with sealed structural and energy-compliance drawings. HVAC extensions require mechanical permits. We handle all permit documentation and coordination as part of every sunroom project.

Can a sunroom be connected to existing HVAC in a Sunnyvale home?

Four-season sunroom additions are designed to connect to the existing HVAC system or receive a dedicated mini-split unit. The approach depends on the existing system's capacity and your preferred heating and cooling configuration. We coordinate with a licensed HVAC contractor to evaluate the best option for your specific home as part of the sunroom design.

Client Experience

“i30 Builders were absolutely the best! Their quote was not only affordable but they were able to get to the work immediately! We plan to use them in the future for other projects our older home needs. These guys are hard workers and definitely problem solvers. When they saw something not conducive to what we planned on doing, they figured out a solution. The pricing stayed the same.”

Laura Olson

Carrollton, TX · Exterior Refresh — Cedar Shutters & Porch Column

Start Your Sunrooms Project in Sunnyvale

Share your scope and timeline. We serve Sunnyvale with coordinated trades and clear delivery — we respond within one business day.