Home additions
Home Additions in Dallas–DFW
Add space the right way — designed, engineered, permitted, and built to blend. Most projects range from $75K–$300K+ depending on scope and type. The goal is simple: the new space should feel original to the house — inside and out.
Types of additions we build
Each addition type has unique structural, permitting, and design requirements. We've built all four across Dallas-Fort Worth.
Second-story build-up
Adding a full second floor over an existing single-story structure. Requires structural engineering for load path, foundation evaluation, and careful roof tie-in. Typical $150K–$300K+, timeline 6–9 months.
Attic conversion
Converting existing attic space into livable square footage — bedrooms, offices, studios. Often requires structural reinforcement (LVL beams), dormers for headroom, and HVAC extension. Typical $75K–$175K, timeline 4–7 months.
Ground-level addition
Expanding the home's footprint outward — new foundation, framing, and full exterior/interior tie-in. Requires setback compliance and foundation engineering. Typical $125K–$250K+, timeline 5–8 months.
Bump-out / room expansion
Extending an existing room by 50–150 sq ft. Common for kitchens, primary bedrooms, and bathrooms. Smaller scope but still requires structural and exterior coordination. Typical $50K–$125K, timeline 3–5 months.
What we handle
Additions are complex. We make them organized.
- In-house design + plans
- 3D elevations and VR walkthroughs
- Engineering coordination (licensed structural engineer)
- Permit acquisition and inspection coordination
- Construction management + finish-level execution
Where your addition budget goes
Approximate allocation by category for a typical addition. Percentages shift based on whether the project is a build-up vs. ground-level expansion.
| Category | % of budget | Typical range | Notes |
|---|---|---|---|
| Design + Engineering | 5–8% | $8,000 – $25,000 | |
| Permits + Inspections | 2–4% | $3,000 – $8,000 | |
| Foundation | 10–15% | $15,000 – $45,000 | |
| Framing + Structural | 15–20% | $25,000 – $60,000 | |
| Roofing + Exterior | 10–15% | $15,000 – $40,000 | |
| HVAC + Mechanical | 5–8% | $8,000 – $20,000 | |
| Electrical + Plumbing | 7–10% | $10,000 – $25,000 | |
| Interior Finish | 15–20% | $20,000 – $50,000 | |
| Windows + Doors | 3–5% | $5,000 – $15,000 | |
| Project Management | 7–10% | $10,000 – $25,000 |
The addition process
Six phases from feasibility to closeout.
- 01
Feasibility (weeks 1–2)
Site visit, existing-structure evaluation, zoning / setback review, and initial scope discussion. We determine what's buildable before investing in design.
- 02
Design + engineering (weeks 3–8)
Architectural plans, 3D elevations, VR walkthroughs, structural engineering, and energy calculations. Plans are submitted for permits.
- 03
Permitting (weeks 8–12)
City plan review and permit approval. Timeline varies by municipality — Dallas proper averages 3–4 weeks; suburban cities 2–6 weeks.
- 04
Pre-construction (weeks 10–14)
Material procurement, subcontractor scheduling, selections finalization, and jobsite prep. Overlaps with permitting to save time.
- 05
Construction (weeks 14–30+)
Foundation → framing → roof → rough-ins → insulation → drywall → finishes. Inspections at each critical stage.
- 06
Closeout (final 1–2 weeks)
Final inspections, punch list, certificate of occupancy, cleaning, and walkthrough. We don't call it done until you do.
How we build additions that feel original
Exterior tie-in
Rooflines, masonry / siding, window and door consistency. The addition should look like it was always there.
Interior continuity
Flooring transitions, trim profiles, drywall, paint match, and detailing that make old and new invisible.
System integration
HVAC zoning, electrical-panel capacity, plumbing routing — engineered before framing starts.
Schedule control
Sequencing, inspections, subcontractor coordination, and weekly updates keep the project on track.
Common mistakes to avoid
Skipping engineering
How we prevent it: Every addition needs a licensed structural engineer. Load paths, foundation capacity, and connection details can't be guessed.
Ignoring HVAC capacity
How we prevent it: Your existing system likely can't handle 300+ new sq ft. We evaluate capacity early and plan zoning or supplemental systems.
Mismatched exteriors
How we prevent it: Brick, siding, roofline, and window proportions must match. We source matching materials before construction starts.
Underestimating timeline
How we prevent it: Additions involve design, engineering, permitting, and construction. Expect 5–9 months minimum for a quality result.
No contingency budget
How we prevent it: Additions uncover unknowns — foundation issues, outdated framing, electrical panel limits. Budget 10–15% contingency.
Choosing the cheapest bid
How we prevent it: Low bids often exclude engineering, permits, or finish-level execution. Compare scope, not just price.
Frequently asked
Questions we hear most
Home additions in DFW typically range from $75K–$300K+. Attic conversions start around $75K; bump-outs $50K–$125K; ground-level additions $125K–$250K+; second-story build-ups $150K–$300K+. Final pricing depends on size, structural complexity, system upgrades, and finish level.
Most additions take 5–9 months from contract signing to completion. This includes 4–8 weeks for design / engineering, 2–6 weeks for permitting, and 3–5 months of active construction.
Yes — all home additions in Dallas and DFW municipalities require building permits. This includes structural, electrical, plumbing, and mechanical permits. We handle all permitting and inspections.
Usually, yes — but it requires a structural engineer to evaluate foundation capacity and load path. We assess feasibility during discovery, then bring engineering on board if the project moves forward.
Typically yes — well-executed additions that blend architecturally can recoup 50–70% of cost at resale and significantly improve livability. ROI is highest when the addition addresses a clear market gap (e.g., adding a primary suite or bedroom count).
Yes — most clients stay home during construction. Additions are largely exterior work until the interior tie-in phase. We manage dust containment, noise, and access to minimize disruption.
A build-up adds a second story over your existing footprint. A build-out expands the home's footprint at ground level. Build-ups avoid foundation work but require structural engineering; build-outs require new foundation but are often simpler structurally.
Yes — we manage in-house design with 3D elevations and VR walkthroughs, and coordinate with licensed structural engineers. This ensures the design is buildable and the engineering is integrated from day one.
We focus on additions of 300+ sq ft with budgets starting at $150K. This threshold allows us to deliver the engineering, permitting, and finish-level execution that quality additions require.
Plan your addition
Schedule a consultation and we'll evaluate feasibility, scope, engineering needs, and budget before any commitments are made.