Alexandria Township radon testing and mitigation

Part of Alexandria Township, Alexandria Township is a large rural township in western Hunterdon, running from the Musconetcong ridge down toward the Delaware valley.

Housing stock. Farmsteads and 19th century village houses along the old roads, with substantial large-lot residential development from the 1980s onward.

Water supply. Very little of Alexandria sits inside a public supply area. A well here draws from the rock at the western margin of the Newark Basin — the same rock under the slab.

The ground under Alexandria Township

Alexandria Township covers ground where the western edge of the Newark Basin meets the higher country toward the Musconetcong, and the rock varies across it accordingly. What is consistent is the water supply: this is well country almost without exception, and the wells draw from the same fractured rock that supplies the soil gas. The housing splits sharply — pre-1900 farmhouses and crossroads village houses with stone foundations and often open cellars, and thirty-plus years of large-lot building with modern poured basements. On the old properties, the honest answer is frequently a membrane system and a lot of sealing; on the newer ones, a conventional slab system usually does it.

That is the shape of the ground here, not a finding about any one address. The NJ Geological Survey maps the formations; a certified contractor measures what is actually happening beneath a particular slab.

Around Alexandria Township. The requests come from the Little York and Mount Pleasant crossroads; the Everittstown area; the Route 513 corridor toward Frenchtown; the Nishisakawick and Hakihokake creek valleys; the higher ground on the Musconetcong side.

Working here

Large lots with ample room around the house on most properties.

What moves the cost here

Access is rarely the constraint on these lots. Cost is decided by what the foundation actually is, and by whether a well-water result adds a second, separate system to the scope. A quote for a farmhouse that was priced as though it were a subdivision house will not survive contact with the cellar.

Alexandria is one of Hunterdon's larger rural townships and sits at the western margin of the Newark Basin, so bedrock and depth to rock change noticeably between the Musconetcong side and the Delaware side of the same municipality.

Its housing divides almost cleanly into pre-1900 stone-foundation properties and post-1980 poured-basement houses, with very little in between — two entirely different mitigation jobs under one town name.

Permits and paperwork

Permits go through the Alexandria Township construction office. With effectively universal private wells, the gross alpha screening required on Hunterdon wells at the point of sale is often where the water-side question first appears.

Because postal addresses and municipal boundaries diverge across this county — and because construction-code services are sometimes shared between towns — the first thing to establish is which office actually has jurisdiction.