Roof first, almost always.
The test is simple: if your roof has less than 10 to 15 years of life left, replace it before the panels go on. Solar panels last 25 to 30 years. If the roof underneath gives out at year 12, you pay to take the whole array down and put it back up, and that bill lands on top of the roof you were going to buy anyway. Doing it in the right order means you pay for the roof once.
This question usually arrives one of two ways. Either you are shopping for solar and someone mentioned your roof, or you already have panels and your roof has started to fail underneath them.
Both situations have the same answer, and it is the boring one. The roof is the foundation the array sits on for the next 25 years. Fixing the order of operations is worth more money than almost any other decision in the project.
| Roof first, then solar | Solar first, roof later | |
|---|---|---|
| Roofing cost | Paid once | Paid once, but later |
| Detach and reset | $0 | $4,000 to $9,500 |
| Roof warranty | Full term, from a fresh install | Whatever is left, if anything |
| Penetration risk | Flashed once, into new material | Flashed twice, into aging material |
| Downtime | None. No system yet | Days to weeks with the system off |
| Coordination | One trade, then the other | Two companies, two schedules, two liabilities |
The exception is a genuinely young roof. If your roof was installed five years ago and it is architectural shingle in good condition, you have 20 years of life left and there is no reason to touch it. Put the panels on.
The industry term for removing a solar array, storing it while other work happens, then remounting and reconnecting it. Sometimes shortened to R and R, for removal and reinstallation. It is a solar job, not a roofing job, even though a roof is the reason for it.
Here is the arithmetic that decides it.
Solar panels are warranted for about 25 years and physically last 30 or more. A roof underneath them has to make it at least that far, or the array has to come off mid-life. So the question is not "is my roof leaking." It is "will this roof outlive the panels."
Years of remaining roof life below which you should re-roof before installing solar. This is the threshold the roofing and solar industries broadly agree on, and it is the number to hold a contractor to if they tell you your roof is fine.
Translating that into Southern California roofs:
Age is the starting point, not the answer. What actually determines remaining life is what the deck looks like and how the existing penetrations were handled. We have opened up 18-year-old roofs with sound sheathing and plenty of life, and 11-year-old roofs with soft plywood around every vent. If a solar company is about to mount an array on your house, get a roofer up there first and ask for a written condition report, not a verbal "looks fine." It costs nothing and it is the cheapest insurance in the whole project.
If the panels are already up and the roof needs to go, this is the number you are trying to pin down.
Published 2026 ranges cluster around $250 to $400 per panel for a straightforward detach and reset on the same roof. Some sources quote $200 to $500. On a typical residential system of 16 to 24 panels, that puts most jobs somewhere between $4,000 and $9,500, and that is before the roof itself.
What pushes it toward the top of the range, or past it:
You will see articles quoting "$200 to $500 per panel to remove" and then separately "$125 to $200 per panel to reinstall," as though you pay both. Run that on 20 panels and you get $6,500 to $14,000, which does not match the totals those same articles quote. The higher per-panel figures are usually the combined detach and reset, not removal alone. Ask any quote to state clearly whether the number covers taking them down, putting them back, or both.
Permits are the smaller line item, and California caps them. Government Code section 66015 limits a residential solar permit fee to $450, plus $15 per kilowatt above 15 kW. AB 1132 extended that cap through January 1, 2034, so it is current law. A city or county can charge more, but only by adopting a written finding and an ordinance showing substantial evidence of its actual cost, which most do not do. If a quote shows a $900 permit line on a normal residential system, ask which ordinance authorizes it.
This is where most homeowners get a surprise, and where most articles on this topic are simply wrong.
Under a lease or a power purchase agreement, the solar company owns the equipment on your roof. You are renting it. A lot of guidance concludes from that ownership that removal must therefore be the company's cost. That is not how the contracts work.
Sunrun's own customer FAQ states it plainly: once a system is installed, if you need your roof replaced, you pay Sunrun to temporarily remove the panels while that work is done. Most lease and PPA agreements contain a clause putting the cost of moving the equipment on the homeowner when the homeowner is the one who needs it moved. Reported fees commonly run $1,500 to $4,000. Read your agreement before you budget, and get the number in writing from the company that holds the contract.
The confusion comes from two things that are true but different. Lease maintenance genuinely is covered, so if an inverter fails, that is their problem, not yours. And at the natural end of a lease term, if you choose not to renew, removal is often free. Neither of those is the same as taking the array down mid-term because your roof aged out.
The rule that matters more than the money: do not let your roofer remove leased panels. You do not own them, the roofer is not authorized to touch them, and doing it anyway can void the system warranty entirely. Call the company that holds your contract first, get their detach and reset scheduled, and build the roofing schedule around theirs.
If you have had solar in California for a few years, this is probably the thing you should be most protective of, and it is missing from nearly every article comparing roofs and solar.
Systems that received Permission to Operate on or before April 14, 2023 are on NEM 2.0 and grandfathered for 20 years from that PTO date. Systems interconnected after that fall under NEM 3.0, the net billing tariff, where exported power earns dramatically less. A California appellate court upheld NEM 3.0 in March 2026, so it is settled. If you are on NEM 2.0, that grandfathering is worth real money and you do not want to disturb it.
A detach and reset does not reset your NEM clock. The grandfathering is tied to the interconnected system, and taking the same panels off and putting the same panels back does not change the system size. What can end it early is expanding the array beyond a one-time allowance of roughly 1 kW or 10 percent. Adding a battery does not affect it either. So if a solar company suggests "while the panels are down, let's add a few more," stop and price that decision separately. A handful of extra panels is not worth dropping your whole array onto NEM 3.0 export rates.
Two things to confirm rather than assume. Get any answer from your utility in writing, an email or a case number, not a verbal reassurance from an installer. And check which utility you are actually on: LADWP is a municipal utility and is not governed by the CPUC's NEM 2.0 or NEM 3.0 at all. It runs its own net metering program with its own rules. A large share of Los Angeles County homeowners are on LADWP and are reading advice that does not apply to them.
An array is anchored to your roof with dozens of penetrations. Every one of them is a place water can get in if it is flashed badly. This is the part of the project where a contractor's opinion is actually worth something, so here is ours.
Solar does not automatically void a roof warranty. The major manufacturers are solar-aware. GAF states that properly installed PV mounts do not void its limited shingle warranties. Owens Corning and CertainTeed both offer programs that cover roof and solar together when the work is done by approved contractors. What voids coverage is improper flashing, non-approved sealants or mounts, or penetrations made outside the manufacturer's published details.
Leaks almost always trace to the mounting points. When they happen, the relevant coverage is usually the installer's workmanship warranty, which commonly runs 5 to 10 years. A panel manufacturer's warranty covers equipment defects, not your roof.
Which brings up the real argument for sequencing the work properly. When one roof is installed, then an array is mounted on it by a solar company, and a leak shows up three years later, you have two contractors pointing at each other and a homeowner in the middle. Doing the roof first, with the penetrations flashed into new material and both scopes documented, is the version where responsibility is clear.
A residential array typically adds 2.5 to 4 pounds per square foot, per the Department of Energy. Most framing handles that without trouble. A roof already compromised by rot or prior water intrusion is a different question, which is another reason the deck condition matters more than the age on paper.
If the answer came out "roof first," the order below keeps the two trades from tripping over each other.
If you already have panels and the roof is failing, the order flips but the principle holds: call the solar company first to schedule the detach and reset, then build the roofing schedule around their availability, not the other way round.
If you want the underlying decision framework on the roof itself, our guide on roof repair versus roof replacement covers when a repair is genuinely the honest answer, and 3-tab versus architectural shingles covers which material buys you the years. We are a roofing contractor in Los Angeles and Orange County and a roof assessment is free.
It depends on the material and the condition, not the number by itself. A 12-year-old architectural shingle roof in good condition likely has 13 to 18 years left, which is borderline but often workable. A 12-year-old 3-tab roof probably has 3 to 8 years left, which is not. Get a written condition report before you decide, because the deck underneath matters more than the age on the permit.
If you own the system outright, a qualified crew can sometimes handle it, but check your solar workmanship warranty first because many require their own technicians. If the system is leased or on a PPA, the answer is a firm no. You do not own that equipment, and letting an unauthorized party remove it can void the warranty on the whole system. Call the company that holds the contract.
No. Grandfathering runs 20 years from your Permission to Operate date and is tied to the interconnected system. Taking the same panels down and putting them back does not change the system size, so it does not restart anything. What can end it early is expanding the array beyond a one-time allowance of roughly 1 kW or 10 percent. If you are on LADWP rather than SCE, different rules apply entirely, since LADWP is a municipal utility outside the CPUC's net metering framework.
Roughly $250 to $400 per panel in 2026 for a straightforward job on the same roof, so about $4,000 to $9,500 for a typical 16 to 24 panel system. Leased systems commonly run $1,500 to $4,000 as a flat fee from the solar provider. It goes higher if the original installer is out of business, the mounting hardware has to be replaced, or the roof is steep or hard to access.
Not by itself. GAF states properly installed PV mounts do not void its limited shingle warranties, and Owens Corning and CertainTeed both offer programs covering roof and solar together through approved contractors. What voids coverage is improper flashing, non-approved sealants or mounting hardware, or penetrations made outside the manufacturer's published details. Get the warranty path confirmed in writing before either crew starts.
California caps residential solar permit fees at $450, plus $15 per kilowatt above 15 kW, under Government Code section 66015. AB 1132 extended that cap through January 1, 2034. A city or county can charge more only by adopting a written finding and an ordinance showing substantial evidence of its actual cost. If you see a permit line well above the cap on a normal residential system, ask which ordinance authorizes it.
Leaks usually trace to the mounting penetrations, and the relevant coverage is normally the solar installer's workmanship warranty, which commonly runs 5 to 10 years. A panel manufacturer's warranty covers equipment defects, not roof damage. Document it with photos, get an independent roofing inspection that identifies the specific penetration points, and notify the installer in writing promptly, because these warranties have reporting windows.
The logic is the same but the timing is different. Concrete and clay tile can last 50 years or more, but the underlayment beneath it typically does not, and a lift and relay to replace that underlayment is a full detach and reset if panels are mounted above. Have the underlayment assessed, not just the tile, before you assume a tile roof buys you decades of runway.
A note on what we do and do not do: Hybrid Renovations is a licensed roofing and general contractor, CSLB #1085596. We are not a solar installer and we do not sell solar systems, so we have no stake in which panels go on your roof. We inspect, repair and replace roofs, and we will tell you honestly whether yours needs to come off before an array goes up. For questions about your specific solar contract or net metering agreement, talk to the company that holds your agreement and your utility.