Custom Wine Cellars in Denver

A wine cellar is a small room with demanding physics. It has to hold a steady cool temperature and moderate humidity all year, without sweating inside the walls or making the rest of the house work harder. Gribbons Group Corp is a licensed & insured general contractor that designs and builds custom wine cellars across the Denver metro.

Projects range from glass-front showpieces off the living room to a converted space under the basement stairs.

We handle the parts that decide whether a cellar works long term: the vapor barrier, insulation, cooling, door, and electrical. Then we build the racking and finishes that make it yours.

Thinking about a cellar? Call (720) 223-9003 or request a free estimate.

What a Wine Cellar Has to Do

Wine is commonly stored around 55°F with relative humidity somewhere in the 50–70% range. Colorado makes the humidity side harder: our air is dry most of the year, so a cellar here often has to add or hold moisture rather than remove it. The room has to keep those conditions steady, because swings in temperature and humidity are what cause problems, not a degree or two either way.

That’s why a real cellar is built differently from a closet with a wine fridge in it. It’s a sealed, insulated room with its own cooling, and every choice, from glass to lighting to the door, adds or removes heat the cooling system has to handle.

Vapor Barrier and Insulation

This is the part you’ll never see and the part that matters most. A room held at 55°F sits next to warmer, drier air in the rest of the house. Without a properly placed vapor barrier, moisture moves through the wall and can condense inside it, which leads to mold, rot, and ruined drywall.

• A continuous vapor retarder on the warm side of the assembly, wrapped around walls and ceiling with seams and penetrations sealed. Placement depends on the wall type and where the cellar sits in the house, so we detail it for your room.
• More insulation than a normal interior wall, in walls and ceiling, so the cooling unit isn’t fighting heat from adjacent rooms.
• Foundation walls and slabs in basement cellars treated with care, since concrete brings its own moisture.
• Moisture-tolerant materials on the cellar side, chosen for a cool, humid room.
• An exterior-grade or insulated door with full weatherstripping and a threshold seal. A standard interior door leaks cold air all day.

If a basement has any history of water, we find and fix the source before we build a cellar against that wall.

Cooling Systems: Self-Contained, Ducted, or Split

Cellar cooling units are not ordinary air conditioners. They’re designed to hold lower temperatures without drying out the air. The right type depends on where the heat can go and how much noise you’ll tolerate.

Self-contained (through-wall)

One unit mounted in the wall, cooling the cellar on one side and exhausting heat on the other. Simplest to install and service. The catch is that the heat and fan noise go into the adjacent room, so that room needs enough volume and airflow to absorb it. Good for smaller cellars next to a large, unfinished basement space or a utility room.

Ducted

The unit sits in a mechanical space or nearby room and connects to the cellar through ducts. Quieter in the cellar and less visible, with more flexibility on where heat is rejected. It needs room for the unit and duct runs, and more planning during framing.

Split systems

An evaporator inside or near the cellar and a condenser outside or in a remote space, connected by refrigerant lines. Usually the quietest option in the cellar and a good fit for larger or glass-heavy rooms. It requires refrigeration work by a qualified technician and a place outside for the condenser, which may bring HOA review.

We size the cooling from the room’s actual heat load: volume, insulation, how much glass, lighting, the temperature of the surrounding space, and how often the door opens. We also plan the condensate drain, the dedicated circuit the equipment calls for, and service access so the unit can be maintained without tearing out racking.

Racking Options

Racking is where a cellar starts to feel personal. Common approaches:

• Wood racking in individual bottle slots, diamond bins, or case storage. Species are chosen for stability in a cool, humid room.
• Metal and cable systems that display bottles label-forward, often used in modern and glass-front cellars.
• Mixed layouts with display rows at eye level, bulk storage below, and a tasting counter or shelf for decanting.
• Magnum and large-format storage planned in from the start, since standard slots won’t fit them.

We lay out racking with the cooling in mind, leaving clear airflow paths so there are no warm dead spots behind bottles, and we tell you roughly how many bottles a layout holds before anything is built.

Glass-Front Wine Cellars

Glass walls and doors turn a cellar into a feature of the house. They also add heat load and a condensation risk, because glass insulates far worse than an insulated wall. Getting it right means:

• Insulated glass units rather than single panes, with frames and seals built for a temperature difference.
• Cooling sized for the added glass, which often points to a ducted or split system.
• Placement away from direct sun and heat sources where possible.
• Lighting that doesn’t add much heat. LED fixtures on a switch or sensor are the usual choice.

Basement Cellar or Under-Stair Cellar?

Basements are the natural home for a cellar. The surrounding ground keeps temperatures more stable, and there’s usually room for a walk-in space and a place to put cooling equipment. It’s also easy to build a cellar as part of a larger basement finish, so framing, electrical, and HVAC are planned together.

Under-stair cellars put otherwise wasted space to work and can hold a surprising amount of wine. They’re tighter to build: the stair structure can’t be compromised, access for cooling equipment is limited, and a glass front often means the cooling has to be ducted or split to keep noise and heat out of the living space.

Main-level cellars off a dining room or great room are possible too. They need the most careful insulation and cooling because the surrounding rooms are warmer.

If you’re planning a cellar as part of a bigger basement project, see what you can put in a finished basement.

Permits and Planning Notes

Whether a cellar needs a permit depends on the scope and your jurisdiction. New framing, electrical circuits, and mechanical or refrigeration equipment often do, especially when the cellar is part of a basement finish. We confirm with your building department before design and handle the application and inspections when one is required.

Two other checks we make early: whether your electrical panel has room for a dedicated cooling circuit, and whether an outdoor condenser needs HOA approval.

How a Wine Cellar Project Works

1. Walkthrough. We look at the space, surrounding rooms, where heat can go, electrical capacity, and any moisture history.
2. Design. Layout, racking, glass, lighting, and a cooling approach sized to the room.
3. Written scope and estimate. Everything spelled out, including the cooling unit and who services it.
4. Permits, if required. Drawings, application, and inspections.
5. Build. Framing, vapor barrier, insulation, electrical, cooling, drywall or paneling, door, racking, and lighting.
6. Startup and walkthrough. We bring the cellar down to temperature and walk you through the controls before you load it.

More on how we work is on our process page.

Licensed & Insured

Gribbons Group Corp is licensed & insured and holds these contractor licenses: Douglas County #A260170, Jefferson County Class B #1028872, City of Littleton #AEC002126, and City of Arvada #AEC13870. We confirm the permitting jurisdiction for your property during the first conversation.

Other rooms people often build alongside a cellar: home theaters, cigar lounges, and home spas and saunas. Need storage upstairs too? See custom closets. Most of these rooms go in as part of a basement finish; see our pages for Denver, Lakewood, Aurora, Centennial, Parker, and Castle Rock.

Wine Cellar FAQs

What temperature and humidity should a wine cellar hold?

Wine is commonly stored around 55°F with relative humidity in the 50–70% range. Steady conditions matter more than hitting an exact number. We size the cooling and build the room to hold them year-round.

Do I really need a vapor barrier?

Yes. A cool cellar next to warmer rooms will pull moisture into the walls without one. A continuous, correctly placed vapor retarder is what keeps the walls from growing mold.

Which cooling system is best?

It depends on where heat can go and how quiet the cellar must be. Self-contained units are simplest, ducted systems are quieter and more flexible, and split systems are usually the quietest and suit larger or glass-front cellars.

Can you build a cellar under my stairs?

Often, yes. We check the stair structure, how cooling equipment can be accessed, and where heat will go before recommending a design.

Do I need a permit for a wine cellar?

It depends on scope and jurisdiction. New framing, circuits, or mechanical equipment often need one. We confirm with your building department and handle it if required.

How much does a custom wine cellar cost?

Size, the cooling system, the amount of glass, racking materials, and finishes drive cost. We don’t publish a price list; you get a written, itemized estimate after a walkthrough.

Request a Free Wine Cellar Estimate

Tell us about your collection and where you’d like the cellar. We’ll set up a walkthrough and follow up with a written scope and estimate.

Call (720) 223-9003 or email sean@ggcbuilds.com.