Home Additions in Pittsburgh

More space for your growing family — seamlessly integrated additions that look like they were always there.

4.8-Star Rated Licensed & Insured Family-Owned Since 1985

40+

Years in Business

500+

Projects Completed

4.8/5

Customer Rating

All Permits

Handled For You

Why Pittsburgh Homeowners Choose Kletz

Expand Your Home Without the Headaches

A home addition is one of the biggest investments you'll make. We handle every detail — from permits to final paint — so you don't have to.

Seamless Integration

Your addition will match your existing home's style, roofline, and finishes — it'll look like it was always there.

Full Design-Build Service

One team handles design, engineering, permits, construction, and finishing. No juggling multiple contractors.

Permits & Code Compliance

We handle all Pittsburgh-area permits and inspections. Expert knowledge of local building codes and zoning.

Home Addition Services We Offer

Whether you need an extra bedroom, a bigger kitchen, or a whole new floor — we build it right.

Room Additions

Extra bedrooms, family rooms, home offices, or bonus rooms. Custom-built to your exact specifications.

Second Story Additions

Double your living space by going up. We reinforce foundations and build structurally sound second floors.

Kitchen Extensions

Expand your kitchen footprint for more counter space, a breakfast nook, or an open-concept layout.

Sunrooms & 4-Season Rooms

Enjoy natural light year-round with a heated and cooled sunroom addition connected to your home.

In-Law Suites

Complete living quarters with bedroom, bathroom, kitchenette, and private entrance for family or rental income.

Garage Additions

Attached or detached garages, including bonus rooms above. Full electrical and optional heating.

Our Process

How Your Home Addition Works

01
Free Consultation & Site Visit

We assess your property, discuss your needs, review zoning requirements, and provide a ballpark budget range.

02
Design & Engineering

Detailed plans, structural engineering, and material selections. We submit for permits and handle all approvals.

03
Construction

Foundation, framing, roofing, siding, windows, HVAC, electrical, plumbing — our crews handle it all.

04
Final Inspections & Move-In

We pass all inspections, complete finishing touches, and do a walkthrough before you enjoy your new space.

Running Out of Space?

Don't move — improve. A home addition may be the smarter, more affordable option.

Kids sharing bedrooms and need their own space

Working from home and need a dedicated office

Aging parents moving in and need an in-law suite

Kitchen or living room feels cramped for your family

Love your neighborhood but need a bigger house

Want to increase your home's value with added square footage

Our 100% Satisfaction Guarantee

If you're not completely satisfied with our work, we'll make it right — guaranteed.

Backed by 40+ years serving Pittsburgh homeowners.

Get Your Free Home Addition Estimate

No obligations. No high-pressure sales. Just honest advice about expanding your home.

✓ Free on-site consultation

✓ Full design-build service

✓ All permits handled for you

✓ Financing options available

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Serving All of Greater Pittsburgh

Home addition services throughout Allegheny, Beaver, Butler, and Washington Counties.

Pittsburgh
Mt. Lebanon
Upper St. Clair
Bethel Park
Cranberry Township
Wexford
Peters Township
Moon Township
Robinson Township
Sewickley
South Fayette
Pine Township