Start with what the lot is, not what it looks like
Three things decide almost everything else about building on a lot in Avon, Simsbury, Canton, Farmington, Burlington or Granby: whether it has public sewer and water, what the soil is, and what the rock does. Get those answers before you design anything; the house should be drawn for the lot.
Septic and wells
Many lots in the Valley are outside public sewer, and some are outside public water too. That means a septic system and a drilled well, and the two have to keep a required distance from each other and from the house, the property lines and any wetland.
A septic system needs suitable soil, enough of it, and depth above rock and groundwater. The way to find out is soil testing on the lot: deep test pits dug with an excavator and percolation tests, witnessed by the local health department. An engineer then designs the system to the soil and to the number of bedrooms. Where the soil is thin, wet or slow, the system gets larger, raised or engineered, and costs more. On some lots no system can be approved at all. "Perc tested" in a listing is a start, not an approval. Ask when it was done, who witnessed it, and whether a design was ever drawn.
A well is simpler but less predictable: its depth and yield are not known until it is drilled.
Ledge
The Valley sits on old rock, and in the hills it comes close to the surface. Ledge affects the foundation, the septic field, the trenches for water and power, and the driveway. Removing it means hammering with an excavator or, for larger amounts, blasting. Blasting needs its own permit, and usually means notice to the neighbors and surveys of nearby homes before the first charge. Often the better answer is to design with the rock: move the house, raise the foundation, turn the problem into a walk-out basement. Test pits with an excavator tell you where the rock is; no map does.
Wetlands, slopes and setbacks
Connecticut protects inland wetlands and watercourses, and every town has an agency that reviews work near them, including a regulated buffer that extends well past the wet ground itself. A soil scientist flags the wetland line, and a surveyor puts it on a map with the property lines, the contours and the setbacks. That map is what everything else is drawn on. Zoning sets how far the house must stay from each line and how much of the lot it can cover, and some towns add rules for steep slopes, ridgelines and tree clearing.
The permits, roughly in order
- Health department: soil testing, septic design approval, and the well permit.
- Wetlands: a permit if any work falls inside the regulated area, sometimes with a public hearing.
- Zoning: a site plan showing the house, the driveway, the well and the septic inside the setbacks.
- Driveway: a permit from the town for a town road, or from the state for a state road, covering the entrance, the sightlines and drainage.
- Building permit: the construction drawings and energy compliance, reviewed under the state building code.
- Inspections through the build, from footings to final, and a certificate of occupancy before you move in.
Each step takes its own time, and some run side by side. Plan on months, not weeks, between buying a lot and breaking ground, and longer if wetlands or blasting are involved. Soil testing has its own season too: some health departments want test pits dug when the groundwater is high.
Where the budget surprises hide
Almost never in the house. They hide in the site work: a long or steep driveway, the distance to the nearest power pole, rock where the foundation or the septic wants to go, an engineered septic system, a deep well, fill and drainage for wet ground, clearing and stumps. None of it shows on a floor plan. That is why we will look at the land before we draw the house, and why the budget we give you lists the site work line by line.