Additions | OBM Construction and Custom Homes
When your family grows or your needs change, a home addition is often a better investment than moving. OBM Construction specializes in additions that look and function like they were always part of your home — not an afterthought bolted onto the side.
We build every type of addition: single-room bump-outs, full-wing additions, second-story expansions, sunrooms, and in-law suites. Every addition project starts with a thorough assessment of your existing structure — foundation capacity, roof structure, mechanical systems, and exterior materials — so the new space integrates properly.
Structural integrity is critical in addition work. We assess load paths, header sizing, foundation requirements, and connection details before breaking ground. When engineering is required, we coordinate with licensed structural engineers and include their specifications in our construction plans.
Living through a renovation is challenging. We plan our construction sequence to minimize disruption to your daily life, maintain weather-tight conditions throughout the project, and protect your existing finishes from construction damage. Dust barriers, floor protection, and daily cleanup are standard practice.
Our addition proposals include a detailed scope of work specifying exactly what is included and excluded, a milestone-based payment schedule, and a realistic timeline that accounts for permit processing, inspection waits, and material lead times in your area.
Ready to discuss your additions project? Contact OBM Construction at (269) 428-6741 or fill out our online form for a free consultation. Licensed. Insured. Local. MI License #242400588.
Frequently Asked Questions
Q: How much does a home addition cost in Michigan?
A: Addition costs vary significantly based on scope. A basic room addition typically starts around $200 to $300 per square foot. Additions involving kitchens or bathrooms run higher due to mechanical systems. We provide a detailed line-item estimate after walking your project so you have real numbers, not guesses.
Q: Do I need a permit for a home addition?
A: Yes, in virtually all jurisdictions. Additions require building permits and typically also require electrical, plumbing, and mechanical permits depending on scope. We handle all permitting as part of our service.
Q: Will the addition match my existing home?
A: That is our standard. We match siding, roofing, trim profiles, and interior finishes so the addition blends with your existing home. We source matching materials before construction begins to ensure consistency.
Q: How long does a typical addition take?
A: Most additions take 3 to 6 months depending on size and complexity. A single-room bump-out may take 8 to 12 weeks. A full second-story addition can take 5 to 7 months. We provide a specific timeline in your proposal.
Q: Can my foundation support an addition?
A: We assess this during our initial evaluation. Some foundations can support additional load; others require new footings or foundation work. If there is any question, we engage a structural engineer before proceeding.