How is a house wired like a commercial building?

At Leslie House the electrical scope covers the full house with a service sized under 600 amps, distributed through sub-feeds, with low voltage for computer, television and telephone permitted separately. The conduit runs are set against the structural frame during rough-in rather than chased into finished walls later.

What is continuous PEX plumbing?

PEX is a flexible cross-linked polyethylene tubing run in continuous lengths from a manifold to each fixture, rather than assembled from rigid segments with joints in the walls. Fewer joints behind finished surfaces means fewer potential failure points. At Leslie House the plumbing was self-performed by the general contractor, who holds the plumbing license of record.

Why would a house need eight water heaters?

Distributing hot water generation puts each source close to the fixtures it serves, which shortens the wait at the tap and reduces the heat lost in long pipe runs. It is a strategy more common in commercial buildings than in residences.

Can an elevator be added to a house later?

Not easily. The shaft is a structural decision made at foundation stage — it has to be carried through every floor and coordinated with the framing and the stair. At Leslie House the residential elevator serves the full height of the house and was permitted as its own discipline.

The Systems — Leslie House, 913 SW 15 Avenue, Miami

This is the part of the house nobody photographs and everybody feels. The mechanical, electrical and plumbing here belong to a small commercial building, not a residence — and the builder holds the plumbing license of record, so the hardest of it was self-performed rather than subcontracted out and hoped for.

MEP

8 water heaters

Continuous PEX distribution behind them, and a full fixture, sewer and storm rough carried by the builder’s own plumbing license. Central air is ducted through the structure rather than dropped below it, which is why the finished ceilings read as clean as they do.

Self-performed plumbing · builder-attested quantities

Elevator

3 floors served

A residential elevator running the full height of the house. The shaft is a structural decision made at foundation stage — it cannot be added later, and on a lot this tight it competes for the same footprint as the stair.

Permitted as its own discipline

Control4

Home automation

Lighting, climate, audio-video, and security and cameras all answer to one Control4 system rather than to four apps that do not speak to each other. That is a decision made at rough-in, not at move-in: the low-voltage cabling was pulled knowing exactly what it would eventually control, which is why the LED baseboard and cove lighting could be detailed into the structure instead of added to it.

Low voltage

∞ computer · television · telephone

Structured cabling pulled through the whole house on its own permit, alongside a full-house electrical scope with a service sized under 600 amps and sub-feeds distributing it. The house was wired for what it would need later, not for what it needed at rough-in.

Separate low-voltage permit

The electrician

Battle Electric

The electrical scope on this house is not a residential scope. A service sized under 600 amps, sub-feeds distributing it through the whole structure, structured low-voltage cabling on its own permit, and a smart-home layer that had to be roughed in before anybody knew exactly what it would eventually control.

On top of that, the architectural lighting: LED baseboard and cove details that are not fixtures hung on a finished surface but channels formed into the structure. Lighting like that is decided at rough-in, in the dark, months before anyone sees it work — and if the runs are wrong then, the concrete has already been poured around them.

The plainest thing that can be said for them is this: Academia Development Corp holds an electrical contractor’s licence of its own, EC13013134, and could have self-performed this scope the way it self-performed the roof and the plumbing. It put the electrical in Battle Electric’s hands instead, and left it there for the length of the job. A licensed contractor choosing somebody else to do work it is qualified to do itself is the most direct compliment available in this trade.

The rough-in

Everything, before it disappeared.

Before anything stood up, this went in the ground. Drainage is the one system you cannot revisit once the slab is over it.

Rough-in

Every fixture on its own line.

Red hot, blue cold, one pair per fixture, all of it leaving from a single board. A leak anywhere is isolated at one valve instead of behind a wall.

Rough-in

Every circuit in its own pipe.

Conduit banked across the framing and dropped to each box. Running it in pipe rather than loose cable is what makes a circuit re-pullable in twenty years, without opening a wall.

Rough-in

Rigid trunk, not flex all the way.

Rectangular sheet metal, externally insulated, carried through the studs as a hard trunk. Flexible branch is what most houses get end to end; keeping the mains rigid is what holds static pressure and keeps the air quiet.

Domestic hot water: Eight water heaters
Water distribution: Continuous PEX
Plumbing scope: Full fixture, sewer and storm rough and set — self-performed
Electrical: Battle Electric — full house: service under 600A, sub-feeds, fixtures
Low voltage: Computer, television and telephone throughout — separate permit
Home automation: Control4 — lighting, climate, audio-video and security on one system
Architectural lighting: LED baseboard and cove lighting, detailed into the structure
Vertical transport: Residential elevator, full height of the house
Mechanical: Central air conditioning, ducted distribution and venting

Scope lines are taken from the permitted trade descriptions. Quantities marked builder-attested are stated by the general contractor, who performed the work.

Rough-in