How Long Does Solar Installation Take in Texas? The DFW Timeline Explained

One of the most common questions from DFW homeowners who have decided to go solar is: how long will this actually take? The honest answer for most residential installations in the Dallas-Fort Worth area is 4–8 weeks from signed contract to your system going live. That range exists because permit and utility timelines vary by city and circumstance. This guide walks through every step so you know what to expect — and what to push on if your timeline is dragging.

The Full DFW Solar Installation Timeline at a Glance

Step 1: Site Assessment and System Design (Days 1–7)

After you sign a contract, a Zencore Solar technician visits your home for a detailed site assessment. This includes a roof measurement and condition evaluation, shading analysis using a calibrated tool, electrical panel inspection, attic access check, and satellite imagery cross-reference. From that data, we produce engineering drawings: a roof plan showing exact panel placement, a single-line electrical diagram, and a 3D production model using local DFW irradiance data.

This design phase typically takes 3–7 days. You review and approve the final design before anything moves to permitting.

Step 2: HOA ARC Application (If Applicable) — Concurrent with Permitting

If you live in an HOA community, we submit the ARC application simultaneously with the city permit application to avoid sequential delays. HOA ARC review is typically the longest variable in the DFW timeline — most HOAs meet monthly, and if your application misses a meeting, it waits for the next one. We submit complete, well-documented packages to minimize revision requests.

Step 3: City or County Building Permit (5–15 Business Days)

Solar installations require a building permit from the city or county where your home is located. In DFW, each municipality has its own permit office and review timeline. Permit timelines by city approximate as of mid-2026:

• ✓Frisco, McKinney, Allen: 5–10 business days — these cities have high solar permit volume and efficient review processes
• ✓Plano, Richardson: 5–12 business days
• ✓Fort Worth, Arlington: 7–15 business days — larger cities with more permit volume
• ✓Dallas: 7–15 business days
• ✓Smaller municipalities (Southlake, Keller, Mansfield): 5–10 business days
• ✓Unincorporated areas (county jurisdiction): 3–8 business days — often faster than city permit offices

Step 4: Physical Installation (1–2 Days on Your Roof)

Once the permit is approved and equipment is staged, installation typically takes one full day for systems up to 12 kW and two days for larger or more complex systems. Our crew installs racking, panels, inverter or microinverters, conduit, wiring, and the monitoring gateway. You do not need to be home during the installation.

After installation, the system is wired and ready — but it cannot operate until the city inspection passes and Oncor completes the meter upgrade. We do not turn it on prematurely.

Step 5: City Final Inspection (1–5 Business Days After Request)

After installation is complete, we request the final inspection from the city building department. A city inspector visits your home to verify the installation matches the permitted drawings and meets electrical and building codes. Most DFW cities complete final inspections within 1–5 business days of the request.

Step 6: Oncor Interconnection and Meter Upgrade (1–4 Weeks)

This is typically the longest single step in the DFW timeline. After the city inspection passes, we submit interconnection documentation to Oncor. Oncor then schedules a meter upgrade — replacing your standard meter with a bidirectional meter that tracks both electricity you draw and electricity your system exports to the grid.

Oncor's interconnection queue varies with the season. Summer tends to be the longest wait (4+ weeks) because interconnection requests peak when homeowners want systems live before July bills. Winter typically runs 1–2 weeks. We submit interconnection applications as early as possible in the process to minimize this wait.

Step 7: System Activation — Your First Kilowatt-Hour

Once Oncor installs the new bidirectional meter, we activate the system. This is typically done remotely or with a brief final visit to confirm everything is communicating correctly with the monitoring app. From this point, your system is generating solar power, offsetting your grid consumption, and exporting surplus energy for buyback credits.

What Causes Solar Installation Delays in DFW — and How to Avoid Them

• ✓HOA approval delays: The most common cause of extended timelines in HOA communities. Starting the ARC application the same day as the permit application, and submitting a complete package the first time, minimizes this.
• ✓Permit corrections: A permit application with missing documentation or incorrect drawings comes back with correction requests. Our design team produces permit-ready drawings on the first submission for the vast majority of applications.
• ✓Oncor queue: Unavoidable during peak season. We submit interconnection applications as early as the permit process allows to get in queue early.
• ✓Electrical panel upgrade: If your home needs a 200-amp panel upgrade before solar can be installed, this adds 1–2 weeks to coordinate a licensed electrician and schedule a separate inspection.
• ✓Roof repair: If the site assessment reveals a roof repair is needed, addressing it before installation adds time. Better to catch it in the assessment than after panels are installed.