Home Additions
The hard part of an addition is the township, not the timber. We run the zoning analysis first, carry the variance where one is needed, and only then draw something we already know can be built.
We check what your lot allows before a line is drawn.
Tied into the existing foundation, drained and damp-proofed.
How new meets old is decided on paper, not on site.
In short
Plan on four to seven months on site, preceded by three to six months of design, engineering and municipal approval. You need a variance only if the addition breaks a zoning rule — setback, lot coverage or height. Pinnacle runs a zoning analysis before design, so you know at the outset whether relief is needed, what the odds are, and how many months it adds.
Overview
An addition contract with us starts months before anyone breaks ground. Zoning analysis, a feasibility sketch tested against your lot’s setbacks and coverage limits, architectural drawings, structural engineering, the permit set, and — where the design needs relief — the variance application and our appearance in front of the board on your behalf. Then excavation, footings, foundation, framing, roof, envelope, mechanical extension, and the full interior and exterior tie-in to the house that was already there.
Scope is set by the lot far more than by taste. A rear extension onto open yard, behind a house that already meets its setbacks, is the straightforward case and is mostly a construction problem. A second storey is a structural problem first — we have to establish whether the existing foundation and bearing walls can carry another floor, and with reinforcement they usually can. Anything that pushes into a setback is a legal problem before it is either, and that is the version that adds months rather than dollars.
The joint between old and new is where additions are judged. Siding profiles get discontinued, brick and stone are never re-matched exactly, and a roofline that meets the original at the wrong pitch announces itself from the street forever. We plan the tie-in at design stage — how the new roof plane lands, where the siding break falls, whether re-cladding one full elevation is cheaper than chasing a match — and price each option before you choose between them.
What we do
An addition is a small house attached to a larger one. These are its pieces, and most of them carry their own approval.
We test your lot against setbacks, coverage, height and floor-area limits before anything is drawn. Where the design needs relief we prepare the application, assemble the exhibits and appear before the board with you.
Read morePlans, elevations and sections drawn in-house, with structural engineering stamped by our engineer. What you approve is the same set the framers work from and the inspector reads.
Read moreFootings dug below the New Jersey frost line, formed and poured, with the new foundation tied into the existing one and the whole assembly drained and damp-proofed before backfill.
Read moreFloor system, walls, roof, windows and the weather layer — sheathing, house wrap and flashing at every penetration — closed in and inspected before any interior work begins.
Read moreHeating, cooling, electrical and plumbing either extended from the existing house or given their own zone, plus the structural work where the addition meets what was already standing.
Read moreInsulation, drywall, trim, flooring, paint and any built-in work, specified as one package with the rooms it opens into so the addition never reads as a bolt-on.
Read more
The joint
The seam between the old house and the new one is the first thing a neighbour looks at.
Siding profiles get discontinued and brick is never re-matched exactly. We decide how that junction lands at design stage and price the honest options, rather than promising an invisible match nobody can deliver.
Recent work
Each of these cleared a township before it cleared a foundation. Open one for the whole build.
View projectUnion County · 2024
Two-storey rear addition on a new foundation, adding a family room below and a primary suite above.
DetailView projectUnion County · 2024
New family room with exposed rafters and sliding doors to the patio
DetailView projectUnion County · 2024
Primary suite above the addition, under the pitched ceiling
How an addition runs
The same four stages every Pinnacle project runs through — described here as they actually play out on an addition.
Before we draw anything we pull your lot’s zoning and measure what the ordinance will genuinely allow — setbacks, coverage, height, and whether your municipality counts a covered porch against you. You leave that meeting knowing whether a variance is in your future.
Plans, elevations and structural engineering, then the permit set into the township. Where the design needs relief we prepare and present the variance package. This stage is where an addition’s schedule is really decided — construction, by comparison, is predictable.
Excavation, footings below frost, foundation, then floor system, walls and roof. Inspections at footing, foundation, framing and rough-in, each booked ahead so the crew is never idle waiting on the township.
Envelope closed, systems connected, interior finished, and the joint between old and new detailed and clad. Final inspections, sign-off on the new space, and a walkthrough with you.
Where we work
Every township reads its own ordinance differently, and an identical drawing can clear in four weeks in one and take eleven in the next. We know these ones.
Towns we work in most often
All 21 counties
Questions
Four to seven months on site, preceded by three to six months of design, engineering and municipal approval. Townships vary widely — an addition in one municipality can clear approvals in four weeks while an identical drawing next door takes eleven.
Only if the addition breaks a zoning rule such as setback, lot coverage or height. We run a zoning analysis before design so you know at the outset whether you need a variance, what the odds are, and how many months it adds.
In most of North and Central Jersey, adding on to a house you already own beats buying the equivalent house, once transfer taxes, commissions and the current rate environment are counted. The honest exception is when the existing systems and envelope are at end of life — then you are paying to renovate the old house as well as build the new part.
Usually yes. An addition is built alongside the house rather than through it, and the genuinely disruptive stretch is short — the days when the existing wall is opened up to connect the two. We seal that opening temporarily and schedule the connection to be as brief as the weather allows.
Closely, and we will tell you where it cannot. Siding profiles get discontinued and brick and stone are never re-matched exactly. Where a match would read as visibly off, re-cladding one whole elevation often costs less than chasing it and looks deliberate rather than patched. We price both options at design stage.
The variance took four months and they walked us through every board meeting. Once they broke ground the schedule never moved. We got our keys back the week they said we would, back in June.
Related work
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