Delmer Home Improvements & Services builds custom home additions for homeowners across Howell, Monmouth County, and Ocean County. Second-story additions, in-law suites, room extensions, sunrooms, garage conversions — if it adds square footage to your home, our crew has built it. We handle every phase in-house, from architectural planning and permits through framing, mechanical systems, and interior finishes. One team, one point of contact, start to finish. Call (732) 905-2064 for a free in-home consultation.
There’s a reason so many homeowners in Monmouth and Ocean County are choosing to build additions instead of selling. You’ve already got the neighborhood you want, the school district your kids are in, and a mortgage rate you’d never get again in today’s market. What you don’t have is enough room.
Maybe it’s a growing family that’s outgrown the bedrooms. A parent who needs to move in and needs their own space. A home office that’s been crammed into a corner of the living room since 2020. Or maybe you just bought a home in Howell or Freehold that checks every box except square footage — and adding on makes more financial sense than buying bigger.
That’s where we come in. Antonio Merino and the Delmer team have been building home additions across central New Jersey for over 20 years. Antonio started as a carpenter and still works on-site with his crew. That means your addition isn’t just structurally sound — it’s built with the kind of craftsmanship and finish detail that makes the new space feel like it was always part of your home.
We’re fully licensed (NJ HIC #13VH08726800), insured, and we handle all permits, engineering coordination, and township inspections. You deal with one team and one phone number from start to finish.
Home addition costs vary widely depending on the type of addition, the size, the complexity of the structural work involved, and your material and finish selections. In New Jersey, most home additions fall in the range of $150 to $350+ per square foot for full construction. The ranges below are just to give you a range, if your considering an addition, we recommend you reach out so we can provide a much more accurate cost assessment.
Every home and every family is different. Here are the most common types of additions we build across Howell, Freehold, Colts Neck, Manalapan, and the surrounding area — though if you have something else in mind, call us. If it involves adding livable space to your home, we’ve probably built it.
Adding a full or partial second floor is one of the most impactful ways to expand your home without using any additional lot space. This is especially common in Howell and surrounding towns where lot sizes and setback requirements limit how far you can build outward. We handle the structural reinforcement of your existing foundation, framing, roofing, and full interior build-out — bedrooms, bathrooms, hallways, closets, HVAC extensions, and all finish work.
In-law suites have become one of our most requested projects. Whether it's a ground-level addition with a private entrance, a bedroom-bathroom-kitchenette combo, or a fully self-contained living space, we design and build in-law suites that give your family members independence and privacy without sacrificing your home's layout or flow. These projects often involve dedicated HVAC, plumbing, and electrical systems.
Sometimes you don't need an entire new wing — just 150 to 300 extra square feet in the right spot. Bump-outs are a cost-effective way to expand a kitchen, enlarge a bedroom, or create space for a mudroom or laundry area. We extend your existing foundation, match the roofline, and integrate the new space so it feels seamless from inside and out.
Sunrooms are one of the best ways to bring natural light into your home while adding usable living space year-round. We build both three-season and fully insulated four-season rooms with proper HVAC, insulated glass, and roofing that ties into your existing structure. A well-built sunroom adds livable square footage that you'll use every day — not just a glass box bolted onto the back of the house.
If you have an attached or detached garage that's become a storage dump, converting it into a living space — a home office, guest bedroom, gym, or studio — is one of the most affordable ways to add functional square footage. We handle insulation, flooring, drywall, electrical, plumbing (if needed), and all finish work. Depending on your situation, we can also build a new detached garage to replace the converted space.
Many homes in Monmouth County were built with smaller, closed-off kitchens that don't match how families live today. Expanding your kitchen into an adjacent room — or building outward to create an open-concept kitchen and family room — is one of the highest-ROI additions you can make. These projects typically involve structural wall removal, new foundation work, and full kitchen build-out including cabinetry, countertops, plumbing, and electrical.
A home addition is one of the most complex residential construction projects there is. It involves foundation work, structural engineering, framing, roofing, mechanical systems, and interior finishes — all while connecting seamlessly to your existing home. Here’s how we keep it organized and stress-free.
We visit your property, walk through the areas you want to expand, and discuss your goals — how many rooms, what the space needs to do, your budget range, and your timeline. We also assess the existing structure, check your lot for setback constraints, and identify anything that might affect the build (septic location, utility lines, grading). No cost, no obligation.
Based on the consultation, we develop a detailed scope of work. For larger additions — second stories, in-law suites, major expansions — we coordinate with a structural engineer to produce stamped plans. We help you make material and finish selections (siding, windows, roofing, flooring, fixtures) and provide a comprehensive written estimate with no hidden costs. You know exactly what you're getting and what it costs before we break ground.
We prepare and submit all permit applications to your local township — whether that's Howell, Freehold, Colts Neck, Middletown, or anywhere else in Monmouth or Ocean County. We handle zoning reviews, construction permits, and coordinate all required inspections throughout the project. If a variance is needed due to setback or coverage limitations, we advise you on the process and help prepare the application.
Before framing begins, we prepare the site — protecting landscaping, setting up access, and excavating for the new foundation. Depending on the project, this could be a poured concrete foundation, crawlspace, slab-on-grade, or reinforcement of your existing foundation for a second-story addition. This phase also includes extending or upgrading underground utilities (water, sewer/septic, electrical) as needed.
This is where your addition takes shape. Our crew frames the new walls, installs floor and roof systems, and ties everything into your existing structure — matching rooflines, aligning floor heights, and ensuring the connection between old and new is structurally sound and watertight. For second-story additions, this phase also includes temporary support systems to protect the existing first floor during construction.
With framing complete and inspected, we rough in all mechanical systems. Plumbing lines for new bathrooms or kitchens, electrical circuits and panel upgrades, HVAC ductwork or dedicated mini-split systems for the new space. All rough-in work is inspected and approved before we close up walls.
We install the roof, siding, windows, and exterior trim — matching your existing home's materials and architectural style as closely as possible. The goal is a seamless match. When we're done, your addition should look like it was part of the original build, not something tacked on later.
Insulation, drywall, flooring, trim, paint, cabinetry, fixtures, hardware — this is where the space comes to life. Once all interior work is complete and final inspections are passed, we do a detailed walkthrough with you. We address any punch list items on the spot and don't consider the project finished until you're completely satisfied.
A home addition of any size is a lengthy and at-times stressful project. Working with the right home addition contractor makes the stress feel like nothing, and leaves your project looking better than it did in your own head! At Delmer Home Improvements, our team is committed to making sure you are satisfied and its this ethic that led to us being rated one of the top Home Additions company in Howell for the last 20+ years!
Antonio Merino built his career as a finish carpenter before starting Delmer Home Improvements. That background shows in every project — clean framing, tight trim, precise exterior matching. Your addition won't look like an afterthought.
Your estimate includes every line item. No vague allowances, no surprise upcharges. If conditions change during construction, we discuss it with you before additional work is performed.
We've built additions on homes throughout Howell, Freehold, Colts Neck, Manalapan, Jackson, Brick, and across Monmouth and Ocean County. We know the local codes, the local inspectors, and the construction realities of homes in this area.
The same team handles your foundation, framing, roofing, siding, and interior finishes. No rotating subcontractors, no communication breakdowns, no finger-pointing between trades.
Call us at (732) 905-2064 or fill out the form below for a free, no-obligation in-home consultation. We’ll walk your property, discuss your goals, and give you a realistic plan and estimate — no pressure, no sales pitch.
If you’re planning a home addition in Howell Township or the surrounding area, there are a few local factors worth understanding before you start.
Howell Township's residential zones (R-3, R-4, and others) each have specific setback, height, and coverage requirements that directly affect what you can build and where. For example, in the R-4 zone — which covers many of Howell's residential neighborhoods — the minimum side yard setback is 20 feet, the rear yard setback is 30 feet, and the maximum building height is 30 feet or 2½ stories. If your addition would exceed any of these limits, a variance application to the Zoning Board may be required. We assess all of this during your initial consultation so there are no surprises during permitting.
All home additions in Howell require construction permits through the Township's Land Use and Building departments (located at 4567 Route 9 North). Depending on the scope, you may also need zoning approval, engineering review, and multiple inspections throughout construction — foundation, framing, rough plumbing, rough electrical, insulation, and final. We handle the entire permit process from application through certificate of occupancy.
Many homes in Howell — particularly in neighborhoods built in the 1970s through 1990s — have specific structural characteristics we see regularly: slab-on-grade foundations that require careful tie-in work for additions, undersized electrical panels (100-amp) that need upgrading to support additional living space, and septic systems that may need to be evaluated for capacity if you're adding bedrooms or bathrooms. We identify these issues during the initial assessment so they're factored into the scope and budget from the start, not discovered mid-project.
Most home additions in New Jersey cost between $150 and $350+ per square foot, depending on the type and complexity. A single-room bump-out might run $60,000–$100,000, while a full second-story addition can range from $180,000 to $400,000+. We provide free, detailed estimates that include every cost so you can plan with confidence.
Timelines depend on the scope of the project. A room extension or bump-out typically takes 6–10 weeks. A full second-story addition or large in-law suite can take 12–20 weeks. Permitting usually adds 2–6 weeks before construction begins, depending on your township. We provide a realistic timeline during your consultation and keep you updated throughout the process.
Yes. All home additions in Howell Township (and virtually every municipality in New Jersey) require construction permits, and most also require zoning review to confirm the project meets setback, height, and coverage requirements. We handle the entire permitting process — application, plans, inspections, and certificate of occupancy — so you never have to deal with the township directly.
That's one of the things we take the most pride in. We carefully match your existing roofline, siding material, window style, and trim details so the addition blends seamlessly with the original structure. When we're done, it should look like it was always part of the house.
In most cases, yes — significantly. Well-built additions that add functional living space (bedrooms, bathrooms, expanded kitchens) typically return 50–70% of their cost in added home value, and in strong markets like Monmouth County, that return can be even higher. Beyond resale value, you also get the immediate benefit of the additional space without the cost and disruption of moving.
In most cases, yes — especially for ground-level additions, bump-outs, and sunrooms that don't disrupt your main living areas. Second-story additions are more involved since they affect the roof and potentially the first-floor ceiling, but even then, most homeowners stay in the home for the majority of the project. We plan the construction sequence to minimize disruption and keep the job site safe and contained.
Building out (ground-level addition) uses more lot space but is generally simpler structurally since you're adding a new foundation and connecting to the side or rear of your home. Building up (second-story addition) preserves your yard space but requires structural reinforcement of your existing foundation and first-floor framing to support the added load. Both are viable options — the right choice depends on your lot size, setback constraints, budget, and what you need the space for. We'll walk you through both options during the consultation.
We're based in Howell, NJ and build home additions throughout Monmouth and Ocean County — including Freehold, Colts Neck, Middletown, Holmdel, Manalapan, Monroe, Jackson, Brick, Wall Township, Red Bank, Rumson, Little Silver, Belmar, and Spring Lake. If your town isn't listed, call us at (732) 905-2064 — we may still be able to help.
We build home additions for homeowners in the following areas. Don’t see your town? Call (732) 905-2064.
