Services
Room Additions & New Construction in DFW
Sometimes your home needs more space — not a new address. Sinai Construction designs and builds additions and new homes across the DFW metro, handling every step from engineering through final inspection.
Who This Is For
- Homeowners adding a bedroom, office, or primary suite
- Growing families needing more space in Garland, Frisco, or Plano
- Property owners building a custom home from the lot up
Not The Best Fit For
- ✕Commercial ground-up construction
- ✕Projects outside the DFW metro
- ✕Homeowners looking for prefab or modular options only
More Space, Without Leaving the Home You Love
An addition is one of the most meaningful investments you can make in your home — and we treat it that way. We start by listening to what your family actually needs: a primary suite, a home office, a bigger living space. Then we design and engineer a solution that feels like it was always part of the house.
DFW's expansive clay soil and foundation movement require careful engineering from day one. We coordinate everything — structural plans, permits, HOA submittals, and city inspections — so the process is smooth from start to finish.
"Additions in DFW fail when the new foundation doesn't tie into the old one right. We engineer that connection first, then build."
— Emerson Funes, Owner
What's Included
Our Commitment to Your Satisfaction
Our proposal covers permits, materials, labor, finishing, and cleanup. The number we give you is the number you pay — so you can focus on the transformation, not the fine print.
Timeline & Cost Expectations
Typical Timeline
12–20 weeks for a full addition; 6–9 months for ground-up construction
Cost Range
$50,000–$300,000+ for additions; custom build cost varies by sq ft and finish
What affects your price:
- •Square footage of the addition or build
- •Whether a second story is involved
- •Roof line / pitch complexity
- •Foundation type and site prep needs
- •Finish level (standard, mid, high-end)
- •Permits and engineering required by city
Additions require a site visit and often a soil assessment before we can quote. We won't guess on a project this size.
Request Free ConsultationOur Process
Free On-Site Consultation
We visit, assess the existing structure, and discuss your goals.
Design + Engineering
We coordinate design plans and licensed structural engineering.
Written All-Inclusive Quote
Full price including engineering, permits, materials, and labor.
Permits & Approvals
We handle all city submittals and HOA coordination.
Build
Foundation, framing, mechanicals, and interior finishing — all sequenced properly.
Final Inspection + Walkthrough
We walk through every room with you before sign-off.
Frequently Asked Questions
What Our Clients Are Saying
Patty Madison
"SinaiConstructing did an amazing job on all 3 of my bathrooms. They replaced vanity tops and hardware as well as all of the tile. They were polite and professional and cleaned up every night before they left."
3 BathroomsBrittany Wooten
"Great work, Sinai has done multiple remodels for us over the years including bathrooms, our kitchen, and most recently a total remodel when a tree fell through our living room. Always on time and within budget."
Multiple RemodelsBrett Fry
"We hired Sinai to redo our fireplace and put in a custom built in cabinet. They did a fantastic job! Jose and Emerson are very detailed and professional. I would highly recommend them to anyone."
Fireplace & Cabinetn nnn
Local Guide
"These guys go above and beyond in their craftsmanship, creativity and customer service. If you are looking for an honest, experienced and affordable company, these are your guys!"
Home Extension & MoreAlan Caldwell
Local Guide
"Honest. Fair. Hard working. Great guy to work with. Very reliable. Cleaned up everything before he left. Very satisfied with the work and price."
Home Remodelmatthew post
Local Guide
"I have been working with Jose at Sinai Construction for around 8 years on multiple single family and commercial properties. He and his crew have always done great quality work for a fair price."
8 Years, Multiple ProjectsWritten by
Sinai Construction
Owner, Sinai Construction | Garland, TX
Sinai Construction was founded in 2015 after years of hands-on remodeling work in the DFW area. Our 8-person crew has completed kitchens, bathrooms, and full home remodels across Dallas, Garland, and Collin counties. Our approach: one all-inclusive price, a clean site every day, and work that stands up over time.
Explore More
Ready to Transform Your Space?
Request your free consultation and take the first step toward the transformation you deserve.