A Basement Workshop Addition with a Deck Above in Carmel

A great workshop needs more than a place to store tools. It needs room to spread out, work comfortably, and bring an idea to life.

At this home in Downtown Carmel, the homeowners wanted dedicated space for their projects. Worthington Design & Remodeling expanded the lower level beneath the deck and connected it to the existing basement, creating two workshop areas with space for woodworking and other creative work. Above, a rebuilt deck provides a place to enjoy the backyard.

Rear of a Carmel home with a raised deck above a brick workshop addition.
A new workshop addition makes use of the space beneath the deck.

Project at a Glance

Location: Downtown Carmel, Indiana.
Project type: Basement workshop addition and deck.
Scope: Expanded the lower level to create connected workshop spaces, rebuilt the deck above, and converted the existing screened porch into a four-season room.

The Challenge

The homeowners wanted dedicated space for their tools and projects, with enough room to work comfortably. Their existing basement did not have the space needed for the workshops they envisioned.

Outside, an elevated deck stood above an open area beside the house. That space offered an opportunity to expand the lower level, but the new workshops needed to connect to the existing basement and support a rebuilt deck above. Inside, lighting, electrical capacity, and access all needed to work for the equipment the homeowners intended to use.

Before and After: A New Purpose for the Space Beneath the Deck

Before construction, the area beneath the raised deck was open to the yard. The finished addition encloses part of that space and connects it to the basement, creating room for a workshop with its own exterior access.

Brickwork ties the new workshop addition to the existing home, while the rebuilt deck and staircase connect the upper level to the backyard.

Before view of the open area and support posts beneath a raised deck in Carmel.
BEFORE: The area beneath the deck was open to the yard.
After view of a brick workshop addition beneath a raised deck with stairs to the yard.
AFTER: The finished lower level adds an enclosed workshop space beneath the deck.

Two Workshops with Room to Create

A wide opening connects the two workshop areas, giving the homeowners space for different types of projects while keeping the rooms close together.

One area accommodates woodworking equipment, including a table saw and other tools. The adjoining space has room for a CNC machine, project tables, and a large utility sink. Windows bring daylight into both areas, while ceiling-mounted lights provide illumination across the workspaces.

Basement woodworking workshop with a table saw, drill press, wall-mounted tools, and windows.
The woodworking area has room for equipment, tools, and hands-on projects.
Workshop with a utility sink, project tables, and CNC machine.
The adjoining workshop provides space for equipment, project work, and cleanup.
Woodworking workshop with double doors, a bandsaw, work surface, and cabinets along one wall.
Double doors provide access to the woodworking workshop, where cabinets and a long work surface keep supplies close at hand.

Designed Around the Work

A workshop works best when the essentials are right where they’re needed. Worthington added a new electrical subpanel, outlets throughout the two spaces, and dedicated circuits for the table saw and CNC machine. Ceiling-mounted lighting brightens the work areas, while windows bring in natural light.

A large utility sink keeps water and cleanup close to the project tables. Double doors open to the backyard, providing another way to access the new space.

The homeowners completed their workshops with the tools and vacuum system shown in the photos.

Large white utility sink beside shelves and a project table in a basement workshop.
A utility sink keeps cleanup close to the work area.
Double doors leading into a brick workshop addition beneath a deck in Carmel.
Double doors provide access between the workshop addition and backyard.

A Deck Rebuilt Above the Addition

The new workshops gave the space beneath the deck a whole new purpose. Above them, the rebuilt deck continues to offer a place to enjoy the backyard.

Worthington reused portions of the existing composite decking and railing where possible, adding materials as needed for the rebuilt deck and stairs. Beneath the deck, a protective roofing layer helps keep water out of the workshop below.

There’s room for a dining table on the deck, with stairs leading down to the yard. As part of the larger project, the adjacent screened porch was also converted into a four-season room.

Raised deck with dark railing and an outdoor dining table overlooking a backyard.
The rebuilt deck provides room for outdoor dining above the workshop addition.
Stairs connecting a raised deck to the backyard beside a brick workshop addition.
Stairs connect the deck to the backyard and workshop level.

Products and Selections

  • Decking and railing: Existing Trex composite decking and railing reused where possible, with additional materials incorporated as needed.
  • Workshop windows: Pella Lifestyle double-hung windows with black exterior cladding and white interior finish.
  • Exterior brick: Stone Mill Meridian Queen-size brick with Logan Gray mortar.

Pro Tip from Larry Greene

When adding a workshop beneath a deck, think about how both spaces need to function from the start. The room below needs protection from rain, while the deck above needs a durable surface and a way to direct water away. Addressing those details together helps the finished addition work as a whole.

Why This Project Stands Out

This addition makes room for the homeowners’ interests on the lower level while preserving a place to gather outdoors above. The connected workshops, dedicated electrical planning, and access to the yard show how an addition can be shaped around the way a family intends to use it.

Questions Homeowners May Ask About a Basement Workshop Addition

Can you build a basement addition under an existing deck?

In some homes, an addition can be built in the area beneath a deck, but the foundation, deck structure, drainage, and connection to the existing house all need to be evaluated. At this Carmel home, the open area beneath the deck became part of a new workshop addition, and the deck was rebuilt above it.

Start with the equipment you plan to use, then consider the space needed around it, electrical requirements, lighting, ventilation, and access for materials. In this Carmel workshop, Worthington added a new electrical subpanel, dedicated circuits for the table saw and CNC machine, and outlets throughout the two work areas.

A room beneath a deck needs a waterproof layer and a way to direct water away from the house. In this project, Worthington installed an EPDM roofing membrane beneath the deck, with flashing where the new construction meets the home. EPDM is a durable rubber roofing material used to help protect the room below from water.

The size of the addition, foundation work, site conditions, utilities, and interior features all affect the investment. At this home, the scope included new foundation construction, a connection to the existing basement, workshop electrical and plumbing, and a rebuilt deck. Schedule a complimentary consultation to discuss your ideas and the factors that could affect your project’s budget.

Make Room for What You Love to Do

This Downtown Carmel project created space for the homeowners’ tools and projects while keeping the deck connected to the backyard.

Explore Worthington’s home addition services, schedule a consultation, or visit the Carmel remodeling showroom to discuss ideas for your home.

Welcome to Worthington!

CASE DESIGN/REMODELING IS NOW WORTHINGTON DESIGN & REMODELING

After 20 years remodeling homes throughout Central Indiana, we’ve decided it’s time for a remodel of our own!  Case locations in Carmel, Meridian Kessler, and Zionsville will become Worthington Design & Remodeling.

The Worthington name pays tribute to our founder and president, Larry Worthington Greene, and demonstrates our unyielding customer promise: your home is worth the very best. Expert design, craftsmanship, service, and superior results remain the cornerstone of all we do. It’s the Worthington Way.

New name—same ownership, team and award-winning dedication to superior results.