Guides
Planning an electrification project from start to finish
The full arc of a home electrification project, phase by phase: assessment, capacity, permits, procurement, installation, commissioning and closeout records.
A home electrification project has a shape, and it is worth knowing before you are inside one. Six phases run from assessment to closeout, each with a decision that should be settled before the next begins. Skipping ahead produces the classic outcome of new equipment sitting idle while a permit or a circuit catches up.
What to take away
- Assessment comes first and produces documents, not opinions.
- Capacity is decided before procurement, never after delivery.
- Permits run on the building department's calendar, not yours.
- Commissioning records are part of the job, not paperwork afterwards.
Phase one and two: assess, then size
Assessment means measuring the house. Twelve months of utility data, equipment ages, a look at insulation and air leakage, and a survey of the existing electrical distribution. The output is a written picture of the building as it is.
Sizing follows. A load calculation for heating and cooling, and a separate electrical load calculation for the service. These are different exercises with different standards behind them, and both belong to licensed professionals. The electrical one determines whether your existing service can carry what you plan to add.
It helps to know what sits upstream of your meter. The EIA explanation of how electricity reaches consumers covers transmission, distribution and the local delivery system, which is the part of the chain a service upgrade actually touches.
Phase three: permits and approvals
Permits are pulled by the licensed trades doing the work, and each trade generally pulls its own. Inspection scheduling is outside anyone's control, so build slack into the plan rather than assuming a same-week visit.
Approvals beyond the building department are easy to forget:
- Homeowner association review for outdoor equipment placement.
- Historic district review where exterior changes are visible from the street.
- Landlord or condominium board consent in shared buildings.
- Utility approval where the service size changes or generation is added.
Each has its own calendar. Starting them in parallel with procurement is the difference between a six-week project and a five-month one.
Phase four and five: procurement and installation
Order equipment only after sizing is settled. Lead times vary and are worth confirming in writing, along with what happens if a substitution becomes necessary.
Installation is where quality is won or lost. The research program behind much of U.S. residential field practice, the Department of Energy's Building America program, has spent decades on how construction practice determines whether a design performs. The lesson for a homeowner is narrow and useful: specify the site work, not just the box.
Ask for these to be documented at handover:
| Item | Why it matters |
|---|---|
| Airflow measurements | Undersized ducts undo a correctly sized system |
| Refrigerant charge verification | Charge errors are common and invisible |
| Control and changeover settings | Backup heat lockout points drive winter bills |
| Circuit labeling | Makes every future service call shorter |
| Permit and inspection sign-off | Needed at resale, not just now |
Phase six: closeout and the first year
Commissioning is the point where the installer proves the system does what was specified. Ask for readings rather than reassurance. Then run the first heating season and the first cooling season with the utility data open, comparing against the baseline captured in phase one.
If the numbers disappoint, resist replacing equipment. Most first-year shortfalls trace to control settings, duct leakage or a lockout threshold, all adjustments rather than purchases. Local rules can also shape what is possible, which our piece on how building rules affect a project covers in detail.
If you are earlier in the process and still deciding whether to start at all, the electrification starting guide covers the groundwork that precedes phase one.
Common questions
How long does a whole-house project take? Anywhere from a few weeks to several months, driven mostly by permits, utility scheduling and equipment lead times rather than labor.
Can phases overlap? Approvals and procurement can run in parallel. Sizing must finish before procurement, and permits must be in hand before work starts.
Who coordinates the trades? Whoever you name in writing. If nobody is named, coordination falls to you by default.
What if an inspection fails? Corrections are normal. The contractor fixes the item and reschedules, which is exactly what the inspection exists to catch.
In this guide
- A buyer checklist for choosing which project to do firstA scoring checklist for ranking competing electrification projects by urgency, payback certainty, disruption and dependency, so the order stops being arbitrary.
- How building rules shape what you can electrifyCodes, permits, zoning and board approvals decide much of an electrification project. Here is which rule layer governs what, and who to ask in each case.
- What owners actually notice after an electrification projectThe changes households report after electrifying, which of them are measurable, and how to read owner accounts without mistaking anecdote for evidence.
- Whole-home, staged or equipment-only: the options comparedThree ways to approach a home electrification project compared on cost shape, disruption, risk and flexibility, with the conditions that favor each one.
- Building in headroom: planning for the upgrades after this oneCheap provisions made during an electrification project that make later additions simple: spare conduit, panel spaces, stub-outs and documented capacity.
