basement window
Skip itWeak search conversion (0.4%) — this niche doesn't clear our bar today.
Review moat
Great215.07avg incumbent reviews — the moat a new listing must climb
Avg price
Great$97.36avg listing price — sweet spot $15–$100
Competition
Good47%top-5 click share — leaders hold, buyers still browse
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Price range
Okay$46.98–$156.56cheapest to priciest tracked listing — scored on the share inside $15–$100
Returns
Okay3.6%return rate — above 5% kills the launch gate
Growth
Okay+10.5%90-day search growth — must beat 0% to launch
Brand share
Okay89%top-5 brand share — brands hold most of the demand
Market size
Bad$71K$71K/yr · 162K searches
Conversion
Bad0.4%search→purchase rate — share of searches ending in a sale
According to Flapen's Amazon United States niche tracking, basement window is a $71K/yr Amazon United States market (162K searches/yr). The top 5 brands hold 89% of demand. Demand peaks in Jul. Verdict: Skip it — 42/100.
Data updated Jul 27, 2026 · scored weekly · How we score niches
basement window market data
- Units sold / yr
- 1K–1K
- avg 0–100/product
- Revenue / yr
- $97K–$122K
- units × avg price
- Conversion rate
- 0.4%
- Avg BSR
- #26
- Page quality
- 0%
- Prime
- 89%
- Sponsored
- 93%
- Out of stock
- 18.6%
- Avg brand age
- 39 months
- Avg seller age
- 184 days
Competition & brand share
The top 5 products take 47% of clicks — established leaders, but buyers still shop beyond them.Brands
10 falling
Sellers
11
Top-5 brand share
89%
Top 20: 100%
Top-5 click share
47%
Top 20: 90%
Open market
8%
- COLORPAPA44%
- NOTASA25%
- CroBlissful9%
- Kathfly8%
- Advantage Vent4%
- TGBHYJ3%
- Open — no brand owns it (4 brands, 8%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +10.5% search growth over the last 90 days.Peak months: Jul · busiest ÷ quietest = 1.7×
Top basement window search terms
- basement window54K/yr
- bathroom window40K/yr
- basement windows23K/yr
- ventanas para baos10K/yr
- small bathroom window9K/yr
- bathroom windows9K/yr
- hopper window6K/yr
- ventana para bao5K/yr
- replacement basement windows4K/yr
Top basement window products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
COLORPAPA Vinyl Basement Window 32 x 14 Slider Window with Double Pane Insulated Tempered Glass and Fiberglass Mesh Screen for Basement Bathroom Home RV Garage (White)
COLORPAPA$96.384.3★91 rev
NOTASA Vinyl Basement Hopper Window Bathroom Window 32 x 18 White
NOTASA$118.944.6★22 rev
CroBlissful 1 Pcs 16 x 8 Small Basement Windows Sliding White Vinyl Bathroom Window Window Mobile Home Windows with Double Glazing Screen for Basement Bathroom Glass Block Cabins House Garage
CroBlissful$80.484.1★35 rev
NOTASA Vinyl Basement Window Bathroom Sliding Window 32 x 18 White
NOTASA$117.424.6★59 rev
COLORPAPA Vinyl Hopper Basement Window 32 x 14 White
COLORPAPA$104.124.8★16 rev
Newest
by launch date
NOOTA Basement Window with Removable Mounting FlangeSliding Tempered Dual-Pane Glass PVC Window for Basement Fits Non-Standard Rough Openings 32 14
NOOTA$99.437 rev
COLORPAPA Vinyl Basement Sliding Window 32 x 14 Black
COLORPAPA$107.4916 rev
COLORPAPA Vinyl Hopper Basement Window 32 x 14 White
COLORPAPA$104.1216 rev
COLORPAPA Vinyl Hopper Basement Window 36 x 24 White
COLORPAPA$156.5616 rev
NOTASA Vinyl Basement Window Bathroom Sliding Window 24 x 16 White
NOTASA$96.8459 rev
Trending
90-day click momentumNOOTA Basement Window with Removable Mounting FlangeSliding Tempered Dual-Pane Glass PVC Window for Basement Fits Non-Standard Rough Openings 32 14
NOOTA$99.433.4★
CroBlissful 1 Pcs 16 x 8 Small Basement Windows White Vinyl Bathroom Window Shed Window Mobile Home Windows with Double Glazing Screen for Glass Block Cabins House Garage (Clear Glass)
CroBlissful$81.264.1★
COLORPAPA Vinyl Basement Sliding Window 32 x 14 Black
COLORPAPA$107.494.8★
NOTASA Vinyl Basement Window Bathroom Sliding Window 24 x 16 White
NOTASA$96.844.6★
Yuzzy Shed Windows 2 Pack 10x23 Sliding Windows Transom Window with Tempered Glass and Removable Fiberglass Screen for Shed Chicken Coop Playhouse Household Garage Barns (White)
Yuzzy$77.244.1★
What buyers say about basement window
What buyers praise and complain about, mined from review topics.What buyers love
“Its fit exactly as size like it”
“Great value”
“It's a well-made product”
“Installed perfectly and looks excellent”
“Looks like pictures”
“Looks beautiful”
“Sturdy, Clean Look, and Easy to Install”
“ease of use in mind”
“Great looking and quality materials, really easy to install, don't overpressure the screws to keep the square”
“durable”
What buyers complain about
“Cheap lock”
“Fram A little flimsy”
“It does not secure the sliding window”
“Dimensions are off”
“Installs Like a Problem”
“came apart easily”
“Box is mislabeled so Amazon will ship wrong color window”
“This information was nowhere to be found in their description”
“The included directions are very basic”
“My garage had an old plexiglass fixed leaking excuse of a window”
Top return reasons
Common questions
- Is basement window profitable to sell on Amazon United States?
- The niche generates $71K/yr across 28 tracked products. 14 of 18 products launched in the last 360 days are still selling. 90-day search growth is +10.5%. Flapen's verdict: Skip it (42/100).
- How competitive is the basement window niche?
- 10 brands and 11 sellers compete. The top 5 products take 47% of clicks and top 5 brands hold 89% of demand.
- What do buyers complain about in basement window?
- Top complaints mined from reviews: Quality-Overall, Strength, Locking Mechanism. The return rate is 3.6%.
- When does demand for basement window peak?
- Demand peaks in Jul; the busiest month runs 1.7× the quietest.
- What does it cost to enter the basement window niche?
- Listings span $46.98–$156.56; the average listing price is $97.36 (sweet spot $15–$100). The average incumbent carries 215 reviews — the moat a new listing must climb.