Climate-controlled storage: what the premium buys, and how to price it
There is a premium at every operator. How big it is turns out to be a fact about one building rather than about the country, which is why this page no longer prints a percentage or a per-size uplift. What it gives you instead is what climate control actually controls, an honest split of what needs it and what does not, and the two questions that measure the premium at your own facility in one phone call.
What changed here on 7 September 2026
A six-row standard-versus-climate price table came off this page, along with the monthly premium and annual extra columns beside it, the three, six, twelve and twenty-four month projections, the worked replacement-cost example, and the “25 to 50 percent” claim in the heading, the standfirst and two FAQ answers. They were hand-typed figures with no source, and the basis they implied was a sample of operator listing pages, which those operators' terms do not permit us to collect or republish. An unsourced statistic about how many US facilities offer climate control went with them. Nothing has been substituted, because a modelled premium wearing a measurement's clothes is worse than an honest gap.
Why nobody can tell you the premium but the facility
A standard drive-up unit is a partitioned metal shell on a concrete slab. A climate-controlled unit is a room inside a conditioned building. Everything that separates those two descriptions is capital and running cost that the climate rate has to carry: the building envelope, the plant, the ducting, the power to run it in that region's weather, and the floor area lost to corridors, lifts and plant rooms that a drive-up row does not spend.
That is why the gap is not a national percentage. It is set by how much of one specific site was built as conditioned space, what it costs to condition in that climate, and how full those particular units are this month. Two facilities four miles apart can price the same uplift differently because one converted an old multi-storey building and the other bolted a climate row onto a drive-up site.
Occupancy sharpens it further. Climate units are a smaller share of most sites' inventory and they fill faster, so when a site is near full the climate premium widens, and when it is not, the premium is where the negotiation is. That is a within-site number by construction, and no national figure can carry it.
The consequence for this page
- 1A national percentage would be wrong at almost every individual site even if it were right on average, and we cannot show that it is right on average.
- 2The two free sources we can show you both blend climate and standard units together, so neither can isolate the premium. They are below, with what each one can and cannot tell you.
- 3The measurement you actually want takes one call and costs nothing: the same size, quoted both ways, at the site you would use.
What climate control actually controls
Three things, and the second is the one that does most of the protecting. Ask the facility which of the three its units actually manage, because the term is used loosely and a heated-only unit is advertised in much the same language.
Temperature
Held, not just heated
A true climate unit holds a band year round rather than only stopping the building from freezing. Ask for the band the site actually maintains and whether it is cooled in summer as well as heated in winter.
Humidity
The one that matters
Active dehumidification is what protects wood, paper, leather, electronics and instruments. Mould, warping, corrosion and foxing are moisture problems before they are temperature problems. A heated unit does not do this.
Air movement
Filtered and circulated
Conditioned buildings move and filter air rather than letting it sit. It reduces dust and stops the pockets of still, damp air that form in a sealed shell. It is the least important of the three and the one most often used to sell the other two.
We no longer print a temperature band or a humidity percentage here. The old figures were presented as an industry standard and there is no industry standard: the band is whatever the operator commits to in the agreement, and it varies. Get it from the site in writing if it matters to what you are storing.
Do you need it? Sort your inventory, not your budget
This is the part of the decision that does not need a price at all. Almost every inventory splits cleanly, and once you have sorted it you usually know the answer before you ring anybody. The rule of thumb: if the material came from something that was once alive, or it has a circuit board in it, humidity is its enemy.
Worth paying for
- ✓Wood furniture (warping and cracking as humidity swings)
- ✓Electronics and computers (condensation corrodes contacts)
- ✓Documents, photos, and books (yellowing, mould, ink smearing)
- ✓Musical instruments (wood cracks, strings and frets corrode)
- ✓Wine and anything food-related (heat ruins it outright)
- ✓Antiques and collectibles (irreplaceable, so the sum is different)
- ✓Leather goods (dries, cracks, then grows mould)
- ✓Artwork and canvas (warping and mildew on the stretcher)
Skip it
- ✕Metal tools and hardware (handle temperature swings fine)
- ✕Plastic bins and containers (made for variable conditions)
- ✕Outdoor and camping gear (already built for the elements)
- ✕Holiday decorations (mostly plastic, fabric, or synthetic)
- ✕Lawn equipment (designed to live outdoors)
- ✕Concrete and masonry tools (humidity is irrelevant)
- ✕Automotive parts (steel and aluminium are resilient)
- ✕Garden supplies and pots (built for outdoor conditions)
If the split is roughly even, price two units at one site: a small climate unit for the left-hand column and a standard unit for the right. At many sites that comes out below one large climate unit, and it is the option people most often miss. It is worth asking for both quotes before you take a single unit.
Where you are changes the answer
Climate control is close to essential in some regions and close to optional in others. This is about ambient conditions, not price, so it holds regardless of what any given site charges.
Southeast (FL, GA, AL, LA, MS)
High needSummer humidity is the highest in the country and it stays high for months. Mould risk is the dominant consideration, and it is the region where a standard unit most often surprises people.
Southwest (AZ, NV, NM, TX)
Moderate needThe problem here is heat rather than moisture. Electronics, plastics, candles, vinyl records and adhesives suffer; low humidity means mould is much less of a worry.
Pacific Northwest (WA, OR)
Moderate needDamp winters rather than temperature extremes. If you are storing over a winter, you are buying dehumidification rather than heating or cooling.
Midwest (OH, IN, IL, MN)
Moderate needFreezing winters and humid summers in the same year, which is the widest annual swing of any region. Year-round storage of sensitive items is where it earns its keep.
Northeast (NY, MA, CT, PA)
Moderate needCold enough in winter to freeze liquids and crack finishes, moderately humid in summer. Reasonable insurance on a long let, easy to skip on a short one.
Mountain West (CO, UT, ID, MT)
Low needDry air and moderate summer temperatures make standard storage workable for most inventories. Reserve climate for the genuinely irreplaceable.
The two price sources anyone can check, and why neither gives you a premium
US Bureau of Labor Statistics, series PCU531130531130
185.5
July 2026, up 1.4% on July 2025
A monthly producer price index for miniwarehouse and self-storage operators, free and running back to December 2003. It tells you the direction of industry pricing, and it is still 7.5% below its December 2023 peak of 200.6.
What it cannot do for this page: standard and climate-controlled units sit inside the same series. There is no split, so the index cannot show a premium at all, and it is an index rather than a dollar figure, which we do not convert because that needs a per-square-foot assumption we would be inventing.
Base December 2003 = 100, not seasonally adjusted. Read 2026-09-13 via St. Louis Fed (FRED); last updated by the US Bureau of Labor Statistics 2026-09-10. Series page.
Public Storage, Form 10-K, FY2025
$22.54
per occupied sq ft per year, against $22.43 a year earlier
Realized annual rent across the company's Same Store Facilities, at 92.0% average occupancy (from 92.4%). It is a real, audited, checkable number, which is more than a listings average ever was.
What it cannot do for this page: it is one portfolio-wide blend across every size, every market and both unit types at once. There is no climate line in it to subtract a standard line from, so it cannot yield a premium, and it must not be multiplied out into a monthly rent for any individual unit.
Filed 12 February 2026, period ending 31 December 2025. Read it on SEC EDGAR, read at source 6 September 2026.
Pricing the premium yourself, in one call
The premium is a difference between two numbers at one site, so it is one of the few things on this site you can measure exactly rather than estimate. You need one phone call and four questions, and the first two are the whole measurement.
- What is the standard rate for the size I need, and what does it become in month two? Both halves matter, because the introductory offer and the tenancy are priced separately.
- What is the climate-controlled rate for that same size, quoted the same way? The difference between the month-two figures is your premium at that site. It is the only version of the number that is true of you.
- Is it climate-controlled or heated, and what does the agreement actually commit to? If the answer is a minimum temperature only, you are not buying humidity control and most of the protection is not there.
- What is currently vacant in climate at that size? Scarcity is what widens the premium. A site with empty climate units prices differently from one with a waiting list, and this question tells you which you are talking to.
Do that at three sites in the same week and you will have a real local premium range, measured rather than modelled, plus the useful discovery that the premium itself varies between sites far more than most people expect. Public Storage's filing is explicit that the tenancy is repriced after move-in: it “We typically increase rental rates to our long-term tenants (generally, those who have been with us for at least five months) every six to twelve months.”. Whatever premium you measure, diary a check five months out.