Slate Roof Replacement in Presidential Estates from $15. Before you replace it: slate outlives its own nails, and that is usually what has actually failed. Free inspection and a written quote.
This is where slate most often survives in the city, and where the expensive mistake gets made most. Stripping a repairable slate roof to asphalt is usually advised by somebody who does not work slate, and on these houses it also takes something off the building that cannot be put back.
Replacing an existing slate roof runs $20 to $35 per square foot -- $40,000 to $70,000 on an average house -- because the old slate has to come off and be disposed of before the new roof starts. A new slate roof is $15 to $30 per square foot. Those numbers are why this page leads with an argument rather than a sales pitch.



Replacing an existing slate roof runs $20 to $35 per square foot -- $40,000 to $70,000 on an average house -- because the old slate has to come off and be disposed of first. A new slate roof is $15 to $30. Those numbers are exactly why this page argues against the job before it prices it. Expect the widest spread on this site here, because the covering might be slate. An asphalt roof on one of these houses sits in the normal range; a slate roof does not, and the difference between repairing one and replacing it is tens of thousands of dollars.
Slate outlives almost everything fixed to it. On a pre-war roof the usual failures are corroded nails, which let slates slip, and rusted valley linings and flashings. All three are repairs, at a small fraction of a replacement.
A steep or cut-up roof, scaffold over occupied units, a slate size or color no longer quarried, and a deck that has to be renewed underneath. Slate work also cannot be rushed without breaking material, so the honest schedule is weeks.
Widespread delamination, slate soft enough to break in the hand, or a deck that has gone. We will say when that is what we found and show you the elevation it is true of, rather than asserting it.
This is where slate is most likely to still be on the roof, and where the expensive mistake gets made. On these houses the slate is frequently sound while the nails and valley linings have gone -- a repair, not a replacement, and the difference runs to tens of thousands of dollars.
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.
Bigger houses, bigger roofs, and a real chance the covering is slate rather than asphalt.
A large pre-war house divided into three is the awkward case here, because the roof is substantial and possibly slate while the regulatory position is the multi-family one.
Flat roofs here are usually over a rear extension or a porch on an otherwise pitched house, which raises a useful distinction: re-covering the flat section may be ordinary maintenance, while rebuilding its fall is structural and is not.
Asphalt on these houses is usually a replacement for something else, and the something else was often slate.
Larger houses here have natural divisions -- a main roof, a wing, a porch, a garage -- and that makes partial work honest rather than a compromise.
The three-unit line runs right through this city.
Genuinely mixed eras. A neighbor proves nothing.
Duplexes divided into three, and the traces that leaves.
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.
Much cheaper up front -- $4.50 to $8.00 a square foot against $20 to $35 to replace slate -- and frequently the wrong decision, because a repairable slate roof has decades left. It is also irreversible on a period house. We will price both honestly and say which we would do.
Often, where the size and color are still quarried. Where they are not, the best match available is sound slate salvaged from a low-visibility elevation of your own roof -- which is why slate coming off is stacked carefully rather than treated as waste.
Yes. The ordinary-maintenance exemption in N.J.A.C. 5:23-2.7 reaches one- and two-family dwellings, so at three units a covering replacement becomes permitted construction work with an inspection at the end. There is a second consequence as well: at three units the building is a multiple dwelling under N.J.S.A. 55:13A-1 et seq.
A building with three or more dwelling units is a multiple dwelling under the Hotel and Multiple Dwelling Law. It is registered with the DCA Bureau of Housing Inspection and inspected on a five-year cyclical basis, with a certificate of inspection filed afterwards. It is an ongoing maintenance regime rather than a one-off approval, and it applies whether or not anybody is doing work.
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.
Unit count established before anything is priced. New Jersey figures, not a national calculator.