Home Additions
& Extensions
Dallas.
Rear additions, second storey additions, room additions, and major home extensions across Dallas and the DFW metroplex. PE-stamped structural drawings, Master Permit packages, and full design-build — one team, start to finish.
More space without the cost of moving
In today’s Dallas real estate market, buying a larger home often costs significantly more than adding onto the one you already own. A well-designed addition can add square footage, increase property value, and create exactly the space your family needs — without the transaction costs, moving disruption, and higher mortgage that come with upsizing.
UTES specializes in additions that integrate seamlessly with the existing home — matching rooflines, exterior finishes, and interior flow so the addition feels like it was always there, not bolted on as an afterthought.
Design and permits only? Many homeowners use UTES for addition design, structural engineering, and permit drawings only — then build with their own contractor. No construction contract required.
Engineering-first design from day one
Every UTES home addition starts with a structural review of your existing home — foundation capacity, wall load paths, and roof structure — before any design decisions are made. This engineer-first approach eliminates costly surprises during construction and ensures the permit package is complete and accurate on the first submission.
All structural drawings are stamped by a licensed Professional Engineer (PE) — required by the City of Dallas for any structural addition. UTES manages the full permit submission through the DallasNow portal and handles all city communications through to approval.
Every type of home addition — design through construction
UTES handles the full range of home addition types in Dallas. Every project includes zoning review, architectural design, PE-stamped structural engineering, and permit submission through DallasNow.
The engineer-led difference
Most Dallas addition contractors subcontract the structural engineering and permit drawings to a separate engineer — adding cost, time, and coordination gaps. UTES brings structural engineering in-house, which means fewer surprises, faster permits, and a single team accountable for the entire project.
What does a home addition cost in Dallas?
Home addition costs in Dallas vary significantly based on addition type, size, finish level, and the complexity of integrating with the existing structure. The table provides general cost ranges for planning purposes.
Design, engineering, and permit fees are additional and typically range from $12,000–$30,000 depending on project size and complexity.
| Addition type | Typical cost range | Timeline |
|---|---|---|
| Rear addition (400–600 sq ft) | $80,000 – $160,000 | 5–8 months |
| Second storey addition | $140,000 – $320,000+ | 7–12 months |
| Master suite addition | $90,000 – $180,000 | 5–8 months |
| Sunroom / covered patio | $40,000 – $100,000 | 3–5 months |
| Major home extension (800+ sq ft) | $160,000 – $400,000+ | 8–14 months |
| Design, engineering & permits | $12,000 – $30,000 | 2–4 months |
Cost ranges are estimates. Final costs depend on size, finish level, structural complexity, and current material pricing. Contact UTES for a project-specific estimate.
From design concept to move-in
UTES manages the full home addition process. Whether you need design and permits only, or a full design-build, the process starts the same way.
Consultation & structural assessment
A site visit to understand your goals, review existing conditions, and assess the structural capacity of your home for the proposed addition. Fixed-fee proposal within 1 business day.
Zoning & setback review
We confirm what is permitted under the Dallas Development Code — maximum addition size, required setbacks, lot coverage limits, and whether any Board of Adjustment variance is needed.
Design & structural engineering
Architectural drawings and PE-stamped structural engineering prepared in-house. All drawings formatted for DallasNow submission. Client review and approval before permit submission.
DallasNow permit submission
Complete permit package submitted through DallasNow. UTES manages all city communications, responds to plan examiner revision requests, and tracks permit status through to approval.
Construction & inspections
Permit issued — construction begins. UTES manages the full build or hands off to your contractor. Regular progress updates, transparent budgeting, and all city inspections coordinated in-house.
Frequently asked questions
Yes. Any structural addition to a home in Dallas requires a building permit through the DallasNow portal. The permit package must include architectural drawings, PE-stamped structural engineering, a site plan, and supporting documents. UTES prepares and submits the complete package in-house.
Home addition costs typically range from $150–$350+ per square foot depending on type, finish level, and structural complexity. A 400 sq ft rear addition might cost $80,000–$140,000. A second storey addition typically costs $140,000–$320,000+. Design, engineering, and permits are additional at $12,000–$30,000. UTES provides a detailed estimate after a site visit.
A typical home addition takes 6–12 months from design start to construction completion — including design and engineering (4–8 weeks), DallasNow permit review (4–8 weeks), and construction (3–6 months depending on size and complexity).
Yes. UTES provides home addition design, structural engineering drawings, and permit packages as standalone services. Many homeowners use UTES for design and permits only, then proceed with their own contractor. No construction contract required.
Yes. A second storey addition requires PE-stamped structural engineering drawings to verify that the existing foundation and walls can support the additional load. UTES includes a full structural assessment of existing conditions as part of every second storey addition project.
Ready to add on
to your Dallas home?
Tell us about your addition project and we’ll provide a fixed-fee proposal within 1 business day.