Rear home addition in Baltimore County by K & S Construction

Home Additions

Custom Home Additions Across Baltimore, Carroll & Howard County

When your family outgrows the house but the location is right, an addition beats moving. K & S Construction and Remodeling designs and builds first-floor additions, master suites, second-story additions, in-law suites, sunrooms, and garage conversions across the Baltimore metro — all under one general contractor.

Types of home additions we build

Every addition is different — different lot, different structural challenges, different family goals. We've built across the full range:

  • First-floor master suite additions
  • Family room and great room rear additions
  • Kitchen expansions and bump-outs
  • Second-story additions over existing footprint
  • Sunrooms and three-season rooms
  • In-law suites and accessory apartments
  • Garage-to-living-space conversions
  • Mudrooms, entryways, and front porch expansions

Permitting and structural work in Maryland

Additions require permits in every Maryland county we work in. We handle the permit applications, work with structural engineers when needed, manage foundation and framing inspections, and close out the project so it's clean for resale and refinancing.

Process for an addition

Feasibility walkthrough. We look at the lot, setbacks, foundation, structural ties, MEP, and budget.

Design. Drawings produced in-house or with your architect.

Estimate & contract. Itemized, with clear allowances and schedule.

Permits. Submitted, tracked, and inspected.

Build. Foundation → framing → roof tie-in → MEP rough → drywall → finishes.

Walkthrough & warranty.

Service area

We build additions across Towson, Phoenix, Cockeysville, Timonium, Perry Hall, Reisterstown, Owings Mills, Westminster, Sykesville, Eldersburg, Ellicott City, and Catonsville.

FAQ

Frequently Asked Questions

How much does a home addition cost in Maryland?

Most additions we build in Baltimore, Carroll, and Howard County run $300–$500+ per square foot finished, depending on whether it's a single-story bump-out, a full first-floor master suite, or a second-story addition. Foundation work, structural beams, MEP relocations, and finishes drive the range.

Do I need an architect for an addition?

For larger additions we work alongside an architect or structural engineer. For smaller bump-outs and rear additions we often handle the drawings and engineering in-house. Either way we'll guide you through it.

How long does an addition take?

Most additions are 3–6 months from groundbreaking to move-in. Permits in Baltimore, Carroll, or Howard County can add weeks to the front of that, which is why we start the permitting process as early as possible.

Can you do second-story additions?

Yes — we've done full second-floor additions across the Baltimore metro. They require careful structural review and weather protection during the build, both of which we plan for upfront.

Service Area

Areas We Serve Across Maryland

Family-owned remodeling contractor serving Baltimore County, Carroll County, Howard County, and surrounding communities — kitchen, bath, basement, and whole-home renovations done by our own team.

Don't see your town? We work throughout the greater Baltimore metro — ask if we cover your area.

Ready When You Are

Add the space, keep the home you love.

Free, no-pressure estimates. Speak directly with Chris the owner/contractor who will personally handle your project from start to finish.