In 2018, LEGO released 48 Friends sets across 15 subthemes, all of these sets have been retired. Subthemes for that year included Airport, Beach, Bedrooms, Heartlake City, Magazine gift, Magazine Gift, Miscellaneous, Music, Promotional, Racing, Seasonal, Small Packs, Sports, Summer, and Value Packs. For that year, the total price of all retail sets cost $987, today those sets are valued around $1,424, a growth of 44%.
Most valuable 2018 LEGO Friends set
41347 Heartlake City Resort $148.64
Highest growth 2018 Friends set
5005237 Rings +231.86%
Most owned 2018 Friends set
41335 Mia's Tree House
48 sets

30403 Olivia's Remote Control Boat

Theme / Subtheme Friends / Small Packs
Year 2018
Pieces / Mini-doll figures 25 / 1
Availability Retired
30403 LEGO Friends Olivia's Remote Control Boat
Retail $3.99
Value $11.69
Growth  +193.0%
Annual growth 8.9%

30404 Friendship Flower

Theme / Subtheme Friends / Small Packs
Year 2018
Pieces 100
Availability Retired
30404 LEGO Friendship Flower
Retail $4.99
Value $9.60
Growth  +92.4%
Annual growth 7.8%

30405 Stephanie's Hockey Practice

Theme / Subtheme Friends / Small Packs
Year 2018
Pieces / Mini-doll figures 35 / 1
Availability Retired
30405 LEGO Friends Stephanie's Hockey Practice
Retail $4.99
Value $10.73
Growth  +115.0%
Annual growth 8.1%

41327 Mia's Bedroom

Theme Friends
Year 2018
Pieces / Mini-doll figures 86 / 1
Availability Retired
41327 LEGO Friends Mia's Bedroom
Retail $9.99
Value $23.08
Growth  +131.0%
Annual growth 7.4%

41328 Stephanie's Bedroom

Theme Friends
Year 2018
Pieces / Mini-doll figures 95 / 1
Availability Retired
41328 LEGO Friends Stephanie's Bedroom
Retail $9.99
Value $16.23
Growth  +62.5%
Annual growth 5.8%

41329 Olivia's Deluxe Bedroom

Theme / Subtheme Friends / Bedrooms
Year 2018
Pieces / Mini-doll figures 163 / 1
Availability Retired
41329 LEGO Friends Olivia's Deluxe Bedroom
Retail $14.99
Value $20.97
Growth  +39.9%
Annual growth 5.1%

41330 Stephanie's Soccer Practice

Theme / Subtheme Friends / Sports
Year 2018
Pieces / Mini-doll figures 119 / 1
Availability Retired
41330 LEGO Friends Sports Stephanie's Soccer Practice
Retail $14.99
Value $20.02
Growth  +33.6%
Annual growth 4.8%

41332 Emma's Art Stand

Theme Friends
Year 2018
Pieces / Mini-doll figures 210 / 1
Availability Retired
41332 LEGO Friends Emma's Art Stand
Retail $19.99
Value $27.00
Growth  +35.1%
Annual growth 3.1%

41333 Olivia's Mission Vehicle

Theme Friends
Year 2018
Pieces / Mini-doll figures 223 / 1
Availability Retired
41333 LEGO Friends Olivia's Mission Vehicle
Retail $19.99
Value $32.92
Growth  +64.7%
Annual growth 5.9%

41334 Andrea's Park Performance

Theme / Subtheme Friends / Music
Year 2018
Pieces / Mini-doll figures 229 / 3
Availability Retired
41334 LEGO Friends Andrea's Park Performance
Retail $24.99
Value $30.00
Growth  +20.0%
Annual growth 3.6%

41335 Mia's Tree House

Theme Friends
Year 2018
Pieces / Mini-doll figures 351 / 2
Availability Retired
41335 LEGO Friends Mia's Tree House
Retail $29.99
Value $39.00
Growth  +30.0%
Annual growth 3.7%

41336 Emma's Art Café

Theme / Subtheme Friends / Heartlake City
Year 2018
Pieces / Mini-doll figures 378 / 2
Availability Retired
41336 LEGO Friends Heartlake City Emma's Art Café
Retail $32.99
Value $44.99
Growth  +36.4%
Annual growth 3.8%

41338 Stephanie's Sports Arena

Theme / Subtheme Friends / Sports
Year 2018
Pieces / Mini-doll figures 460 / 2
Availability Retired
41338 LEGO Friends Stephanie's Sports Arena
Retail $44.99
Value $45.19
Growth  +0.4%

41339 Mia's Camper Van

Theme / Subtheme Friends / Summer
Year 2018
Pieces / Mini-doll figures 488 / 2
Availability Retired
41339 LEGO Friends Mia's Camper Van
Retail $54.99
Value $83.77
Growth  +52.3%
Annual growth 6.0%

41340 Friendship House

Theme / Subtheme Friends / Heartlake City
Year 2018
Pieces / Mini-doll figures 722 / 3
Availability Retired
41340 LEGO Heartlake City Friendship House
Retail $69.99
Value $113.58
Growth  +62.3%
Annual growth 8.2%

41341 Andrea's Bedroom

Theme Friends
Year 2018
Pieces / Mini-doll figures 85 / 1
Availability Retired
41341 LEGO Friends Andrea's Bedroom
Retail $9.99
Value $16.01
Growth  +60.3%
Annual growth 7.5%

41342 Emma's Deluxe Bedroom

Theme / Subtheme Friends / Bedrooms
Year 2018
Pieces / Mini-doll figures 183 / 1
Availability Retired
41342 LEGO Friends Emma's Deluxe Bedroom
Retail $14.99
Value $30.36
Growth  +102.5%
Annual growth 8.5%

41343 Heartlake City Airplane Tour

Theme / Subtheme Friends / Airport
Year 2018
Pieces / Mini-doll figures 323 / 1
Availability Retired
41343 LEGO Friends Airport Heartlake City Airplane Tour
Retail $29.99
Value $42.30
Growth  +41.0%
Annual growth 6.0%

41344 Andrea's Accessories Store

Theme / Subtheme Friends / Heartlake City
Year 2018
Pieces / Mini-doll figures 294 / 2
Availability Retired
41344 LEGO Friends Heartlake City Andrea's Accessories Store
Retail $29.99
Value $34.68
Growth  +15.6%
Annual growth 2.7%

41345 Heartlake City Pet Centre

Theme / Subtheme Friends / Heartlake City
Year 2018
Pieces / Mini-doll figures 474 / 3
Availability Retired
41345 LEGO Friends Heartlake City Pet Centre
Retail $59.99
Value $102.22
Growth  +70.4%
Annual growth 6.2%

41346 Friendship Box

Theme Friends
Year 2018
Pieces 563
Availability Retired
41346 LEGO Friendship Box
Retail $49.99
Value $87.48
Growth  +75.0%
Annual growth 6.0%

41347 Heartlake City Resort

Theme / Subtheme Friends / Beach
Year 2018
Pieces / Mini-doll figures 1,017 / 4
Availability Retired
41347 LEGO Friends Heartlake City Resort
Retail $99.99
Value $148.64
Growth  +48.7%
Annual growth 7.7%

41348 Service & Care Truck

Theme / Subtheme Friends / Racing
Year 2018
Pieces / Mini-doll figures 247 / 1
Availability Retired
41348 LEGO Friends Racing Service & Care Truck
Retail $19.99
Value $20.33
Growth  +1.7%
Annual growth 1.9%

41349 Drifting Diner

Theme Friends
Year 2018
Pieces / Mini-doll figures 345 / 2
Availability Retired
41349 LEGO Friends Drifting Diner
Retail $29.99
Value $32.50
Growth  +8.4%
Annual growth 1.4%

41350 Spinning Brushes Car Wash

Theme / Subtheme Friends / Racing
Year 2018
Pieces / Mini-doll figures 325 / 2
Availability Retired
41350 LEGO Friends Racing Spinning Brushes Car Wash
Retail $29.99
Value $43.10
Growth  +43.7%
Annual growth 5.1%

41351 Creative Tuning Shop

Theme / Subtheme Friends / Racing
Year 2018
Pieces / Mini-doll figures 413 / 2
Availability Retired
41351 LEGO Friends Racing Creative Tuning Shop
Retail $39.99
Value $43.15
Growth  +7.9%
Annual growth 1.4%

41352 The Big Race Day

Theme / Subtheme Friends / Racing
Year 2018
Pieces / Mini-doll figures 648 / 3
Availability Retired
41352 LEGO Friends Racing The Big Race Day
Retail $59.99
Value $59.88

41353 Friends Advent Calendar

Theme / Subtheme Friends / Seasonal
Year 2018
Pieces 500
Availability Retired
41353 LEGO Friends Advent Calendar
Retail $29.99
Value ~$29.99

471801 Dolphin and Crab

Theme / Subtheme Friends / Magazine Gifts
Year 2018
Pieces 32
Availability Retired
471801 LEGO Friends Dolphin and Crab
Value $4.37
Annual growth 8.6%

561802 Andrea's Fashion Design Studio

Theme / Subtheme Friends / Magazine Gifts
Year 2018
Pieces 27
Availability Retired
561802 LEGO Friends Andrea's Fashion Design Studio
Value $1.76
Annual growth 6.0%

561803 Ping-Pong Table

Theme / Subtheme Friends / Magazine Gifts
Year 2018
Pieces 17
Availability Retired
561803 LEGO Friends Ping-Pong Table
Value $2.46
Annual growth 9.2%

561804 Bunnies' Playground

Theme / Subtheme Friends / Magazine Gifts
Year 2018
Pieces 33
Availability Retired
561804 LEGO Friends Bunnies' Playground
Value $2.80
Annual growth 6.4%

561805 Veterinary Cabinet

Theme / Subtheme Friends / Magazine Gifts
Year 2018
Pieces 33
Availability Retired
561805 LEGO Friends Veterinary Cabinet
Value $3.36
Annual growth 5.7%

561806 Beach Shop

Theme / Subtheme Friends / Magazine Gifts
Year 2018
Pieces 26
Availability Retired
561806 LEGO Friends Shop
Value $2.52
Annual growth 4.1%

561807 Beach Shop

Theme / Subtheme Friends / Magazine Gifts
Year 2018
Pieces 27
Availability Retired
561807 LEGO Friends Shop
Value $2.81
Annual growth 6.4%

561808 Dog Hairdresser Salon

Theme / Subtheme Friends / Magazine Gifts
Year 2018
Pieces 26
Availability Retired
561808 LEGO Friends Dog Hairdresser Salon
Value $3.68
Annual growth 10.2%

561809 Andrea's Stage

Theme / Subtheme Friends / Magazine Gifts
Year 2018
Pieces 32
Availability Retired
561809 LEGO Friends Andrea's Stage
Value $3.08
Annual growth 7.5%

561810 Olivia's Observatory

Theme / Subtheme Friends / Magazine Gifts
Year 2018
Pieces / Mini-doll figures 20 / 1
Availability Retired
561810 LEGO Friends Olivia's Observatory
Value $1.79
Annual growth 9.3%

561811 Winter World

Theme / Subtheme Friends / Magazine Gifts
Year 2018
Pieces 30
Availability Retired
561811 LEGO Friends Winter World
Value $3.14
Annual growth 3.0%

853774 Olivia's Satellite Pod

Theme / Subtheme Friends / Miscellaneous
Year 2018
Pieces / Mini-doll figures 34 / 1
Availability Retired
853774 LEGO Friends Olivia's Satellite Pod
Retail $8.99
Value $10.20
Growth  +13.5%
Annual growth 2.3%

853775 Andrea's DJ Pod

Theme / Subtheme Friends / Miscellaneous
Year 2018
Pieces / Mini-doll figures 38 / 1
Availability Retired
853775 LEGO Friends Andrea's DJ Pod
Retail $8.99
Value $12.95
Growth  +44.0%
Annual growth 2.7%

853776 Emma's Photo Studio Pod

Theme / Subtheme Friends / Miscellaneous
Year 2018
Pieces / Mini-doll figures 36 / 1
Availability Retired
853776 LEGO Friends Emma's Photo Studio Pod
Retail $8.99
Value $12.87
Growth  +43.2%
Annual growth 9.4%

853777 Mia's Exploration Pod

Theme / Subtheme Friends / Miscellaneous
Year 2018
Pieces / Mini-doll figures 47 / 1
Availability Retired
853777 LEGO Friends Mia's Exploration Pod
Retail $8.99
Value $12.95
Growth  +44.0%
Annual growth 4.5%

853778 Stephanie's Pool Pod

Theme / Subtheme Friends / Miscellaneous
Year 2018
Pieces / Mini-doll figures 31 / 1
Availability Retired
853778 LEGO Friends Stephanie's Pool Pod
Retail $8.99
Value $12.52
Growth  +39.3%
Annual growth 4.8%

5005236 Friends Clubhouse

Theme / Subtheme Friends / Miscellaneous
Year 2018
Pieces / Mini-doll figures 27 / 1
Availability Retired
5005236 LEGO Friends Clubhouse
Retail $9.99
Value $15.01
Growth  +50.3%
Annual growth 6.0%

5005237 Rings

Theme / Subtheme Friends / Promotional
Year 2018
Pieces 31
Availability Retired
5005237 LEGO Friends Rings
Retail $4.99
Value $16.56
Growth  +231.9%
Annual growth 8.9%

5005238 Pet Go-Kart Racers

Theme / Subtheme Friends / Promotional
Year 2018
Pieces 59
Availability Retired
5005238 LEGO Friends Pet Go-Kart Racers
promotional
Value $5.07
Annual growth 11.2%

5005553 LEGO Friends Easter Bundle

Theme / Subtheme Friends / Value Packs
Year 2018
Availability Retired
5005553 LEGO Friends Easter Bundle
Retail $59.99
Value $75.11
Growth  +25.2%
Annual growth 3.2%