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Sag Harbor Masonry Co.

Vetted masons for the South Fork

The right Hamptons mason for the job

Bluestone patio, fieldstone wall, retaining wall, driveway, pool coping or a chimney that needs repointing: tell us about the job once and a licensed, insured mason who works your town calls you within one business day. Free for homeowners. No spam.

Sag Harbor Masonry Co. finds Hamptons homeowners the right mason for the job. Tell us once about a patio, wall, driveway, pool deck or repair anywhere in 9 South Fork towns, Southampton to Montauk, and one vetted, licensed and insured local mason calls you within one business day. It is free for homeowners; the mason quotes and does the work. We cover 6 kinds of masonry and hardscape work, from thermal bluestone and drystack fieldstone to Belgian block and lime-mortar repointing, and we publish 2026 Long Island cost ranges with sources, so you know what a fair quote looks like.

Last updated · Reviewed by Sag Harbor Masonry Co.

Simple by design

How it works

  1. 1

    Tell us about the job

    Sixty seconds: what you need, where the property is, and when.

  2. 2

    We find the right pro

    One licensed, insured mason, vetted for this kind of work.

  3. 3

    They call you within 1 business day

    You get a real quote from a real local company. No spam calls.

The short version

Why Sag Harbor Masonry

  • One mason, one call

    Your job goes to one mason who is right for it: Suffolk County licensed, insured, local references, and the right hand for your material. A drystack fieldstone wall and a mortared bluestone pool deck are different trades inside the trade. Nobody else gets your number.

  • Hamptons-only, by design

    Nine towns, Southampton to Montauk. The masons we send you to work here every week and know the sandy outwash soil south of the highway, the moraine clay north of it, the salt, the frost line and which village board wants to see the wall first.

  • Straight numbers

    We publish 2026 Long Island cost ranges per square foot and per linear foot, by material, with sources, so you can read a quote before it arrives. If a number is national rather than local, we say so.

  • Free for homeowners

    Participating masons pay us a referral fee. You pay the mason for the work, directly, on their quote, with their warranty.

the Hamptons

Towns we serve

FAQ

Common questions

How much does a bluestone patio cost in the Hamptons?

About $20–50 per square foot installed on Long Island in 2026: the two Long Island contractor sources we found say $20–40 and $30–50, and the national blend is $16–38 (average $17–25). A 400 sq ft terrace is therefore roughly $8,000–20,000 and a 600 sq ft one $12,000–30,000, before steps, seat walls, an outdoor kitchen (national average about $13,180) or drainage. Material is a small part of it: natural cleft bluestone is $6–11 per square foot and thermal $9–14, and thicker stone adds $2–6. The rest is labor and base, and one installer puts site preparation at about 90% of the labor hours. Hamptons quotes sit at the top of the range when access is tight, the pattern is complex or the stone is select blue-blue.

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Thermal vs natural cleft bluestone: which should I use?

Natural cleft is bluestone split along its bedding plane: a textured, slightly uneven face with better grip when wet, less quarry work, and a material price of about $6–11 per square foot. Thermal (flamed) bluestone is heat-treated to a flat, uniform surface: cleaner to lay, easier to sweep, more formal, and about $9–14 per square foot in material because of the extra quarry labor. Both are the same stone, a feldspathic sandstone from the Catskills and northeastern Pennsylvania that absorbs under 2% water, so both survive Long Island winters. Use cleft where feet are wet, around pools and on shaded walks; use thermal for dining terraces and where an architect wants straight lines. Full-color and blue-blue grades are a color decision, not a durability one.

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Do I need a permit for a retaining wall in the Hamptons?

Usually not under 4 feet, usually yes above it. New York's residential code treats a retaining wall not over 4 feet high, measured from the bottom of the footing to the top of the wall, as exempt from a building permit unless it supports a surcharge (a driveway, a slope, a structure) or impounds water. Above 48 inches of retained fill, section R404.4 requires a registered design professional's design, and the wall needs a permit; stamped drawings take 1–2 weeks, and the Town of East Hampton has reported a 16–20 week permit backlog (the Village of East Hampton usually 2–4 weeks). Within 100–150 feet of a wetland in the Town of East Hampton or 125 feet in the Town of Southampton, any wall is a wetlands application, and in the Sag Harbor historic district a visible retaining wall needs a Certificate of Appropriateness.

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Does bluestone need to be sealed?

Not to survive, but usually yes to stay clean. Bluestone absorbs less than 2% water (the best varieties under 0.5%), which is why it handles Long Island freeze-thaw unsealed. Sealing protects against stains, salt and efflorescence. The rule is the type: a penetrating silane or siloxane sealer that lets the stone breathe, never a film-forming sealer, which traps moisture under the surface and flakes it off in winter. Typical cadence for a natural-stone patio is every 2–4 years, closer to 3 near the water or around a pool, at roughly $1–2 per square foot for a terrace and $3–5 per linear foot for coping. Polymeric sand in the joints is a separate item, redone every 3–7 years.

When is the best time of year for masonry work in the Hamptons?

Spring and early fall. The ground is workable, the temperatures suit curing, and crews are not yet booked by June. Summer works but the villages restrict hours: East Hampton Village allows weekdays 8am–6pm and Saturdays noon–4pm from May 15 to September 15, no Sundays; Southampton Village weekdays 8am–6pm and Saturdays 9am–5pm, no Sundays (a Saturday ban was proposed in July 2026); Sag Harbor weekdays 8am–7pm and Saturdays 9am–5pm; Sagaponack 7am–7pm, no Sundays. Mortar work stops when the air or the stone drops below 40°F unless materials are heated and the work is protected for 24–48 hours, so mortared walls, repointing and chimneys are April-to-November jobs; dry-set patios and dry-stacked walls can go on in winter when the ground is not frozen. Permits set the real calendar: 2–4 weeks in East Hampton Village, a reported 16–20 weeks in the Town.

How does Sag Harbor Masonry Co. work, and what does it cost me?

It costs homeowners nothing. You tell us about the project once, roughly sixty seconds: where the house is, what you want built or fixed, and when you want it done. We put you in touch with one licensed, insured mason who works your town and is right for the material and the job, and they call you within one business day to look at it and quote it directly. We are a Hamptons-only referral service, not a masonry contractor, and we are not connected to any stone yard or stone-veneer product of a similar name: one mason, and nobody else gets your number. Participating masons pay us a referral fee.

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Book a Hamptons mason

Sixty seconds. One licensed, insured mason who works your town calls you within one business day. Free for homeowners; nobody else gets your number.

Street address or nearest cross street, plus the town.

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Call (631) 859-7815Book a mason