Electrical Upgrade Planning Guide for Sarasota Homes Before Major Remodels | CoHarbor Electric

Had a job a while back in Gillespie Park — homeowner adding a 400-square-foot primary suite onto the back of the house, and a separate homeowner two streets over just redoing a single bathroom. Both called us “for a quick electrical check.” Neither project was quick, and neither was anywhere close to the same scope of work. That’s the thing we run into all the time — people lump “remodel” into one bucket in their head, when a whole-home addition and a single-room remodel are really two different electrical conversations, with different permitting paths, different load math, and different ways they can blow up a timeline if nobody plans for it early.

We want to walk through both, because knowing which situation you’re actually in changes what you should be asking your electrician before the first wall comes down.

Why Scope Changes Everything

A single-room remodel — say a kitchen or bath redo — usually means working within an electrical system that’s already there. You’re adding circuits, maybe relocating a few, upgrading to GFCI and AFCI where code requires it, but the service itself, the panel, the main feed into the house, often stays as-is. It’s contained. The scope of the room limits the scope of the electrical work, more or less.

An addition is a different animal. You’re not working within the existing footprint — you’re extending it. New square footage means new circuits for lighting, receptacles, HVAC if there’s a mini-split or ductwork extension, maybe a full bathroom’s worth of GFCI-protected circuits if the addition includes one. And here’s where people get surprised: adding load to a home that was already running close to panel capacity can push you into a full panel upgrade you weren’t budgeting for. We’ve had homeowners in Rosemary District plan a gorgeous two-story addition and not realize until we ran the numbers that their 100-amp service, installed back when the house was a bungalow with window units, wasn’t going to carry the new HVAC zone plus everything else.

The Load Calculation Nobody Budgets For

This is the part that gets skipped in a lot of planning conversations, and it shouldn’t. Under NEC Article 220, we’re required to run a load calculation any time you’re adding circuits that meaningfully change the demand on a panel — and for an addition, that’s basically every time. It’s not a formality. It’s the number that tells us whether your existing 150-amp panel has headroom, or whether you’re looking at a service upgrade before a single wire gets pulled in the new space.

For a single-room remodel, that math is usually simpler — a kitchen redo might add a couple of small-appliance circuits and a dedicated circuit for a range or dishwasher, and most panels built in the last twenty years can absorb that without issue. Older panels — the kind we still see plenty of in Arlington Park and West of Trail — are a different story, and that’s worth checking regardless of whether you’re adding a room or just redoing one.

What a Whole-Home Addition Actually Requires

If you’re adding square footage, here’s roughly what we’re looking at before the first stud goes up:

• A full load calculation against the existing service, not an estimate
• Sarasota County permitting for the new circuits, and likely a separate electrical permit from the building permit for the addition itself
• Panel capacity review — does the existing panel have open breaker slots, and does the main service size support the added demand
• Planning for where the new circuits physically originate, which matters more than people expect if the addition is on the opposite side of the house from the panel

That last one trips people up. We’ve run into additions where the cleanest, least invasive path for new circuits meant trenching underground rather than snaking wire through existing walls and attic space, and that changes both the cost and the timeline conversation. Better to know that in the planning phase than to find out once drywall’s already up on one side.

Additions Near the Coast Bring Their Own Wrinkle

If your addition is anywhere near the water — and we get this a lot around the bayfront pockets near downtown and out toward Siesta Key — salt air corrosion is a real factor for outdoor receptacles, exterior lighting, and any panel or disconnect that’s going to live outside. We spec corrosion-resistant hardware for those installs as a matter of course, not an upsell. Cheaping out on exterior electrical near the coast means replacing it again in five years instead of fifteen.

What a Single-Room Remodel Actually Requires

A room remodel is narrower in scope, but it’s not lighter on code requirements — if anything, kitchens and bathrooms carry more code specificity per square foot than almost any other space in the house.

For a kitchen: dedicated small-appliance circuits, GFCI protection at every countertop receptacle under NEC Article 210, and if you’re adding an induction cooktop or double oven, likely a dedicated circuit apiece. For a bath: GFCI protection at the vanity, and if there’s a whirlpool tub or anything with a motor, that circuit needs its own careful sizing.

What we tell people planning a single-room remodel is this — the electrical scope is smaller, but it still needs to happen before the finish work, not during it. We’ve been called into more than one Cherokee Park kitchen where tile was already set and someone realized the range hood didn’t have a circuit. Ripping into finished tile to add a run is a miserable, avoidable job.

The Permitting Difference Homeowners Don’t Expect

Here’s something that surprises people on both ends of this spectrum: an addition typically requires a building permit with an electrical sub-permit through Sarasota County, inspected at rough-in and final stages, coordinated with the general contractor’s timeline. A single-room remodel might only need the electrical permit on its own, especially if the walls aren’t moving and you’re not changing the structure. That’s a lighter lift — but it still means an inspector is going to look at your work, and it still means the job needs to be done to code, not just to “looks fine.”

We’ve seen remodels stall for weeks because nobody pulled the electrical permit up front, assuming a general contractor’s permit covered it. It usually doesn’t. Confirming permit scope with your electrician before work starts saves you from a stop-work order mid-project — which is a conversation nobody wants to have with a kitchen half torn apart.

One Question That Sorts Out Which Path You’re On

If you’re not sure whether your project is “addition-scale” or “room-scale” in electrical terms, ask yourself: is the new work happening inside the existing footprint of the house, or outside it? Inside the footprint, even a big renovation, usually stays within the existing service’s reach with maybe a subpanel added. Outside the footprint — any addition — puts the whole service size on the table for review. That one distinction tells us, before we even walk the site, roughly what kind of planning conversation we’re having.

Let’s Look at Your Plans Before the Demo Starts

Whether you’re adding a whole new wing to a home in Gillespie Park or gutting a single bathroom in West of Trail, the electrical planning should happen at the same time as the design — not after the permit’s already pulled and the dumpster’s in the driveway. We’ll walk the property, run the load calculation against your current panel, and tell you straight whether you’re in good shape or looking at a service upgrade before the project moves forward.

Coharbor Electric is licensed and insured, and we’ve done this planning work across Sarasota long enough to know where the surprises tend to hide — old panels, undersized feeds, permits that get assumed rather than confirmed. Give us a call before your remodel or addition gets underway, and we’ll make sure the electrical side is squared away from the start, not patched together after the fact.