Bathroom Remodeling in Selden, NY

Selden is Town of Brookhaven. Most Selden bathrooms are compact, and in a small bathroom the layout decisions matter far more than the finishes do.

What we see in Selden bathrooms

Selden bathrooms are usually compact, and in a small bathroom the layout decides everything while the finishes decide very little. Moving a door swing, going from a 60-inch tub to a 60-inch shower, or replacing a vanity with a wall-hung one can change how the room works far more than a tile choice does.

The one place not to economize in a small bathroom is ventilation. A small room takes the same shower moisture as a large one with less air in it, and an undersized fan or one vented into the attic is how ceilings grow mould here.

What needs a permit in Selden

Vanity swap, retiling, new fixtures in the same places — finish work, generally no permit. Toilet or shower drain moves, tub converts to a walk-in shower, a bathroom gets added, or a bathroom goes in a basement — permitted work, every time.

The Suffolk catch: adding a bathroom to a house on septic rather than sewer can trigger a Suffolk County Health Services review, because the system was sized for a set number of fixtures. It runs separately from the town permit, on its own timeline. Redoing an existing bathroom does not raise it. Filing detail for Town of Brookhaven Building Division.

Four things decide whether a bathroom lasts, and none of them are the tile: the subfloor, the venting on a moved toilet, the waterproofing membrane behind the tile, and where the exhaust fan actually terminates. What to ask about each. We measure on site for free and put the number in writing as a scope with a total.

Verified August 2026. Requirements and fees change and each department publishes independently. Confirm anything here with the Town of Brookhaven Building Division at (631) 451-6333 before you order materials or sign a contract. One Independence Hill, Farmingville, NY 11738.

Also serving, near Selden

We are based in East Patchogue and work across Suffolk County. If you are inside an incorporated village, the village building department governs rather than the town.

• Patchogue
• Medford
• Islip
• Bay Shore
• Smithtown

If your town is not on the list, call anyway — the list is where we work most, not a boundary. Anything from Nassau through the Twin Forks is fair game; we tell you honestly if travel makes a small job uneconomical.

Frequently Asked Questions

How do I make a small bathroom feel bigger?
A wall-hung vanity that shows floor underneath it, a curbless or low-profile shower instead of a tub, a door that swings out or slides, and larger floor tiles with fewer grout lines. All four are layout and spec decisions rather than expensive ones, and together they change a small bathroom more than any finish does.

Do I need a permit for a bathroom remodel in Selden?
Replacing a vanity, retiling or swapping fixtures in the same locations is generally finish work and needs no building permit. Moving the toilet or shower drain, converting a tub to a walk-in shower, or adding a bathroom is permitted work. There is far more plumbing in a bathroom than a kitchen, so that line gets crossed more often.

Does adding a bathroom in Suffolk County need Health Department approval?
It can. If the house is on a septic system rather than sewer, adding a bathroom may trigger review by Suffolk County Department of Health Services, because the system was sized for a set number of bedrooms and fixtures. That review is separate from the town building permit. Redoing an existing bathroom does not raise it.

Is tile waterproof?
No. Tile is not waterproof; the membrane behind it is. Ask specifically what waterproofing goes in behind the tile, because it is the part you never see and the only part that decides whether the wall lasts.

Related Reading

• Bathroom permits by town — the full breakdown
• Bathroom remodel cost — 2026 Long Island numbers
• Walk-in showers — the conversion that needs a permit
• Septic and Suffolk projects — when SCDHS gets involved
• Bathroom remodeling in Suffolk — local considerations