Roof Replacement in Ampere from $9,500. New Jersey prices, the unit count established first, and a written scope before any number. Free inspection and a written quote.
The recurring Ampere question is how many units the building actually has now. A duplex divided into three flats at some point in the last century is a multiple dwelling whether or not anybody filed anything, and finding that out during a roof job is far worse than finding it out before one.
An architectural asphalt roof in New Jersey runs $9,500 to $26,000, and on a typical 2,000 square foot house most people pay $12,000 to $18,000 installed. Those are state figures. A national calculator reads low here, because northern-climate detailing at the eaves is not optional and is not free.



Those are New Jersey figures for an architectural asphalt roof, and on a typical 2,000 square foot house most people pay $12,000 to $18,000 installed. What moves a quote in this city before the roof does is the unit count, because at three units the work becomes permitted construction and the building changes legal class. Two things push an Ampere quote around. Whether the building is actually three units now rather than two, which changes the paperwork; and how many penetrations a conversion added, because each one is a detail to be flashed properly rather than sealed.
A one- or two-family detached house, so the work is ordinary maintenance and nothing is waiting on a permit. A simple roof shape, somewhere to put a dumpster, and a deck that turns out sound.
Three units and up, so permit and inspection are part of the program. Tenants, who need notice and somewhere to park. No side access, so everything moves through the frontage. And board sheathing that has to be made good rather than nailed into.
How decking replacement is priced. It belongs in the scope as a rate per sheet, because nobody knows how much has softened until the covering is off -- and a lump figure is a guess in one direction or the other.
A neighborhood that grew up around an electrical works and its own railway station, both of which shaped the street pattern and the housing.
Single-family houses, duplexes and apartment buildings together, much of it built for workers at the plant that gave the area its name.
Ampere is where the two- to three-unit conversion question comes up most. A duplex converted to three flats at some point in the last century is now a multiple dwelling whether or not anybody filed anything, and that is worth establishing before a roof job rather than during one.
One is about your building and one is about your covering, and most quotes in this city establish neither.
At one or two and detached, replacing a covering is ordinary maintenance under N.J.A.C. 5:23-2.7: no permit, no inspection. At three it is permitted construction work, and the building is also a registered multiple dwelling under N.J.S.A. 55:13A-1 et seq. on a five-year inspection cycle. Nothing about the roof explains that.
On asphalt, if the covering away from the leak still lies flat, holds its granules and is not brittle, the roof has life in it and a repair is the right job. A failed flashing or a split upstand is hundreds of dollars and is routinely produced as proof that the whole roof is finished.
Two coverings is the practical ceiling. A roof already at two is a tear-off whatever anybody quotes, and it takes two minutes to check at the rake edge. It is the fastest way to tell whether the quotes in front of you describe the same job.
The classic Ampere three-family is a converted duplex, and conversions leave traces on a roof.
Converted buildings collect flat roofs.
Conversions add penetrations, and penetrations are where shingle roofs leak.
Where a slate house was subdivided, the additions almost never got slate: they got asphalt or a flat roof, and the junction between the two is where a slate roof in this neighborhood typically leaks.
Converted buildings usually have a rear addition whose roof is on a different clock from the main one.
The three-unit line runs right through this city.
The largest houses, and where slate survives.
Genuinely mixed eras. A neighbor proves nothing.
Tight frontages, tenants, and nowhere to park a dumpster.
Flat roofs behind parapets. Access comes first.
Same buildings, a different construction office.
Three-plus units is the default, not the exception.
The questions that come up, before you have to ask.
Only where it has actually softened, and as a rate per sheet in the written scope rather than a lump guess. Worth knowing that wholesale decking replacement for rot also takes the job out of ordinary maintenance, so on a one- or two-family house it can change the permit answer partway through.
Only on one existing layer with a sound deck. Two coverings is the practical ceiling, and an overlay also buries the eaves detail -- so if there was never an ice barrier down there, an overlay guarantees there still is not. In this climate that is the wrong saving.
Usually not. Slate outlives almost everything fixed to it, and slipped slates on a pre-war roof normally mean the nails have corroded rather than that the slate has failed. Leaks at a valley usually mean a rusted lining. Both are repairs, and replacing an existing slate roof at $20 to $35 per square foot is a very expensive way to fix a nail problem.
Because most online figures are national and this is not a national market. New Jersey pricing is $9,500 to $26,000 for an architectural asphalt roof, and a good part of the difference is detailing a warm climate does not need: ice barrier at the eaves, drip edge, and the nailing to survive a February gust.
Across separate structures, yes, and it is often the right answer -- a garage, a rear addition and the house are three roofs of three different ages. Across one roof, usually not: mobilization and waste cost much the same twice as once, you get a visible line where new meets weathered, and the half left behind ages through another winter.
Unit count established before anything is priced. New Jersey figures, not a national calculator.