window locks
Worth a lookShows demand growing +117.3% this quarter, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Growth
Incredible+117.3%90-day search growth — must beat 0% to launch
Returns
Great1.4%return rate — above 6% kills the launch gate
Brand share
Good64%top-5 brand share — brands hold most of the demand
Review moat
Good814.53avg incumbent reviews — the moat a new listing must climb
Conversion
Good5.4%search→purchase rate — share of searches ending in a sale
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Competition
Good49%top-5 click share — leaders hold, buyers still browse
Market size
Good£355K£355K/yr · 624K searches
Avg price
Okay£10.49avg listing price — sweet spot $15–$100
Price range
Okay£5.07–£20.92cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, window locks is a £355K/yr Amazon United Kingdom market (624K searches/yr). The top 5 brands hold 64% of demand. Demand peaks in May–Jun–Jul–Aug. Verdict: Worth a look — 66/100.
Data updated Jul 18, 2026 · scored weekly · How we score niches
Market data
- Units sold / yr
- 40K–50K
- avg 1,500–2,000/product
- Revenue / yr
- £420K–£525K
- units × avg price
- Launch success
- —
- 0 of 1 new (360d)
- Conversion rate
- 5.4%
- Avg BSR
- #31
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 93%
- Out of stock
- 3.7%
- Avg brand age
- 29 months
- Avg seller age
- 166 days
Competition
The top 5 products take 49% of clicks — established leaders, but buyers still shop beyond them.Brands
19 falling
Sellers
23
Top-5 brand share
64%
Top 20: 100%
Top-5 click share
49%
Top 20: 87%
Open market
31%
- MIVITOOM28%
- eSynic13%
- BABYGO9%
- beego8%
- AOSITE6%
- Keyohome5%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +117.3% search growth over the last 90 days.Peak months: May, Jun, Jul, Aug · busiest ÷ quietest = 4.1×
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 30 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
2pcs Window Locks Set for UPVC Windows Window Restrictor Locks for Children Security with Screws Keys
MIVITOOM£5.074.5★1,465 rev
BABYGO Window Restrictor Child Safety Lock for UPVC Wooden Metal & Aluminium Windows | Self-Adhesive No Tools or Drilling | Easy Fit Child Window Lock White
BABYGO£8.144.3★372 rev
BeeGo Window Restrictor for UPVC Windows Child Proofing & Cat Window Guard | Self-Adhesive No-Drill Window Lock | No Tools Required (White)
beego£8.154.4★5,282 rev
Window Safety Lock Window Locks for UPVC Windows Restrictors AOSITE 2Pack No Drill Children Proof Window Locks Self Adhesive Pet Safety Child Window Safety Locks with Key Child Security for Home
AOSITE£5.974.2★1,198 rev
4 Pack Window Restrictors for UPVC Windows Safety Locks with Key Cable Lock Door Fridge Cupboard for Children Drillable/Self-Adhesive
MIVITOOM£9.984.5★1,465 rev
Newest
by launch date
Gkhlg 10 Packs UPVC Window Restrictors Stainless Steel 304 Child Safety Window Opening Restrictors with Screws Precision-Designed for UPVC Windows for Homes for Bedrooms Kitchens Offices
Gkhlg£11.851 rev
4 Pcs Window Restrictor for UPVC Window Lock Stainless Steel Window Latches Security Chrome Window Catch Left Right Hand for Home School Kindergarten
FcaecY£6.7326 rev
2 PCS Window Restrictors WODSTA Window Locks Child Safety with Screws and Key 185mm Long Window Restrictors Locks Zinc Alloy Pets & Baby Safety Security Wire Window Locks Child Safety for Most Window
WODSTA£6.211,121 rev
Keyed Cable Window Restrictor Child & Pet Safety Window Opening Limiter for uPVC & Aluminium Frames Screw-Fix Safety Lock Home Secure
HomeSecure£5.17101 rev
Window Restrictor Medium 60mm for UPVC Frames for Cats and Pets pack of two. Cat Guard.
Generic£13.9710 rev
Trending
90-day click momentumWindow Restrictor Medium 60mm for UPVC Frames for Cats and Pets pack of two. Cat Guard.
Generic£13.974.4★
Gkhlg 10 Packs UPVC Window Restrictors Stainless Steel 304 Child Safety Window Opening Restrictors with Screws Precision-Designed for UPVC Windows for Homes for Bedrooms Kitchens Offices
Gkhlg£11.854.0★
eSynic 6Pack UPVC Window Restrictors Strong and Durable Window Locks Child Safety White Window Safety Restrictors Guard Against Theft Window Security Locks with Keys Perfect for Home Baby Safety
eSynic£12.224.4★
4 Pack Window Restrictors for UPVC Windows Safety Locks with Key Cable Lock Door Fridge Cupboard for Children Drillable/Self-Adhesive
MIVITOOM£9.984.5★
eSynic 8Pack Durable Window Locks Child Safety 185mm/7.3 Inch Wire Long Window Restrictor for UPVC Window Safety Restrictors with Key Relieable Window Security Locks Perfect for Home Office Safety etc
eSynic£15.374.6★
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Easy fit”
“Solid Build Quality”
“great value”
“As described”
“easy to assemble”
“Good secure locks”
“Easy peasy”
“Pretty cool for per safety”
“They stick super well”
“Good and strong”
What buyers complain about
“Adhesive is very weak”
“Broke after 2 weeks”
“One of the lock mechanisms has broken after only a couple of uses”
“Poor stick quality”
“These are too long”
“its very flimsy”
“Doesn't work”
“No use for me”
“The only complaint I have is that a few extra cleansing wipes”
“expensive”
Top return reasons
Common questions
- Is window locks profitable to sell on Amazon United Kingdom?
- The niche generates £355K/yr across 30 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +117.3%. Flapen's verdict: Worth a look (66/100).
- How competitive is the window locks niche?
- 19 brands and 23 sellers compete. The top 5 products take 49% of clicks and top 5 brands hold 64% of demand.
- What do buyers complain about in window locks?
- Top complaints mined from reviews: Adhesion/Stickiness, Durability, Locking Mechanism. The return rate is 1.4%.
- When does demand for window locks peak?
- Demand peaks in May–Jun–Jul–Aug; the busiest month runs 4.1× the quietest.
- What does it cost to enter the window locks niche?
- Listings span £5.07–£20.92; the average listing price is £10.49 (sweet spot $15–$100). The average incumbent carries 815 reviews — the moat a new listing must climb.
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