Kitchen Additions
Bumping out the kitchen footprint — new foundation, framing, walls, electrical, plumbing, and a full kitchen rebuild integrated with the new addition. Most cost-effective when paired with a kitchen renovation already on the schedule.
Adding Square Footage to the Kitchen
Kitchen additions extend the existing kitchen with new foundation, walls, and roof on the addition side, then rebuild the kitchen across the new larger footprint. We coordinate the addition (architect, engineer, foundation, framing, mechanicals) with the kitchen renovation (cabinets, counters, appliances) so it lands as one finished kitchen, not an addition stitched onto an old kitchen.
- Foundation excavation and footings on addition side
- Framing and roof tied into existing kitchen wall
- New electrical circuits, plumbing, gas, HVAC zone
- Full kitchen rebuild across new footprint
- Cabinet and counter integration
- Coordinated finish: flooring, ceiling, lighting
Serving homeowners throughout all 70 Bergen County municipalities. View our Bergen County service areas.
Kitchen Addition Guides
Foundation tie-in and utility-extension calls that decide what a kitchen addition costs.
Foundation & Tie-In
- New footings go below frost line and tie into the existing foundation with engineered connections — the joint between old and new is where additions fail or last.
- Waterproofing and drainage at the new foundation match or exceed the existing house; a kitchen addition cannot afford a damp wall.
- Slab-on-grade vs crawlspace follows the existing house and the plumbing plan — drain runs decide more here than preference does.
- Slab-vs-crawlspace follows the drain plan — kitchen additions live and die on waste-line routing.
- The excavation phase is the cheapest moment for every below-grade decision: insulation, utilities, and future rough-ins.
Planning a project like this? Get an estimate.
Roof Tie-In & Drainage
- New roof planes match the existing shingle line with proper valley metal, step flashing, and ice-and-water where code and exposure demand it.
- Drip edge and gutter integration shed water off the addition without dumping against the old foundation or siding joint.
- Cricket and counter-flashing details at chimneys and walls are built in at framing — roof leaks at the join are almost always detail failures.
- Steel or LVL headers carry the opened wall between old kitchen and new space — sized by engineering, hidden in the finished ceiling.
- The old exterior wall's removal sequence is staged so the house stays weather-tight through the connection.
Planning a project like this? Get an estimate.
Wall & Insulation Continuity
- The new wall assembly meets current energy code, and the transition to the older wall gets air-sealed so the seam never reads as a draft line.
- Vapor barrier continuity across old-to-new is detailed, not assumed — condensation finds interrupted barriers.
- Matching interior finish thickness keeps the old-to-new joint invisible where the two walls meet.
- Air-sealing the old-to-new seam prevents the classic addition symptom: a beautiful room that's cold at the joint.
- Roofline tie-in and flashing at the connection get the slowest, most careful hours of the frame — that seam outlives everything.
Planning a project like this? Get an estimate.
HVAC, Plumbing, Electrical Extensions
- Existing furnace, panel, and plumbing capacity are checked before the addition is framed — extensions fail when the source is already maxed.
- New wet walls, range gas, and circuits are stubbed with licensed trades so the kitchen addition is not a series of change orders.
- Panel load review and duct or mini-split strategy are decided in design, not after drywall.
- The addition takes its own HVAC load calculation — extending existing ductwork without the math produces the addition that never heats right.
- Kitchen electrical code applies fresh to the new space: dedicated circuits, GFCI/AFCI, and capacity confirmed at the panel.
Planning a project like this? Get an estimate.
Permits & Setbacks
- Additions trigger zoning setbacks, lot coverage, and full plan review — not a simple building card.
- We coordinate architectural drawings, engineering if required, and the inspection sequence with your town.
- Permit timing is built into the project schedule; construction starts after approvals, not before.
- Natural light is the addition's superpower — window and door placement is designed with the work zones, not after them.
- Sightlines from the existing house into the new kitchen decide how 'addition' the addition feels — openings sized generously read original.
Planning a project like this? Get an estimate.
Cost & Timeline Guide
- Size, foundation, and finish level set most of the $120k–$280k+ band for kitchen additions.
- Roof tie-in, structural opening to the existing house, and full kitchen MEP are the heavy cost centers.
- Engineering plus building permits; 16–28 weeks is a realistic cycle including inspections and cabinet leads.
- Foundation-to-finish additions run 3–5 months with inspections at every phase — the calendar is set by the sequence, not the square footage.
- Weather windows matter twice: excavation and roof tie-in both want dry stretches, and the schedule plans them.
Planning a project like this? Get an estimate.
Your Kitchen Addition Process
Consultation
We walk the existing kitchen, discuss desired expansion, review setbacks and feasibility, and confirm whether kitchen renovation is part of scope.
Scope & materials
Architect produces drawings; structural engineer signs off; cabinet design coordinates with addition footprint; permits filed.
Build
Crew executes addition (foundation, framing, mechanicals) then kitchen rebuild (cabinets, counters, appliances, finish).
Final walkthrough
Final walkthrough across the connected new kitchen, punch-list closeout.
Frequently Asked Questions
For 2026 in Bergen County, kitchen additions (small bump-out) run $120,000-$280,000 including the addition shell plus a mid-range kitchen rebuild. Premium kitchen additions with luxury finishes run $250,000-$500,000+. Pricing and timelines are planning ranges.
Most kitchen additions take 7-12 months from permit issue to final walkthrough.
Yes for most of the build. We help set up a temporary kitchen elsewhere in the house.
Yes. Building, electrical, plumbing, and gas permits all apply. We coordinate filings and inspections.
Yes. Bergen Restoration is a registered New Jersey Home Improvement Contractor (NJHIC# 13VH08865500) with commercial general liability and workers' compensation coverage. Documentation is available on request, and homeowners should verify credentials before hiring any contractor.
When the footprint itself is the problem — no island fits, no eat-in exists — a rear addition buys the square footage the layout needs. The remodel then happens inside a room that finally fits.
Setbacks and lot coverage set the envelope; foundation type and roof tie-in set the budget curve. Even a modest bump-out transforms a galley into an island kitchen.
Yes — full foundation or engineered piers at frost depth, tied to the existing wall properly. Kitchen loads (stone, appliances, people) deserve real bearing.
Plumbing, electrical, and HVAC extend from the existing runs — planned so the new island and range land where service is honest, not heroic. Systems routing shapes the plan as much as design.
The old exterior wall usually opens partially or fully — a structural moment with a beam — and the floor weaves or restarts. That junction is where kitchen additions are won.
Longer than in a pure remodel — the addition builds outside the shell before the wall opens. The kitchen-down window compresses to the tie-in phase.
Steal space from an adjacent room or a bump-out that does not need a new full foundation. A new kitchen wing with new plumbing is not the cheap path. See https://bergenrestoration.com/services/kitchen-renovation/
Part of our Home Additions service family — explore Bathroom Addition, Garage Additions, In-Law Suite Additions, Primary Suite Additions, Room Additions, Second-Story Additions, and Sunrooms & Enclosed Porches.
Get Your Estimate
Reach us by phone or email and tell us about your kitchen addition project. We will follow up with the next best step for your home.
Commercial general liability and workers’ compensation coverage. Documentation available on request.
Let's Talk About Your Project
Tell us what you have in mind — we'll follow up with a plan.