# What are the largest greenhouses available? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

What are the largest greenhouses available?

## Products

### Greenhouse Megastore 1100 Series Hoop House Package CF-24PKG-472, 24 ft x 72 ft
```yaml
product: greenhouse-megastore-1100-series-hoop-house-package-cf-24pkg-472-24-ft-x-72-ft
brand: Greenhouse Megastore
price_gbp: 8198.06
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
base_material: Galvanized steel
greenhouse_size: 24 ft W x 72 ft L x 9 ft H
glazing_material: Double layer 6 mil anti-condensate 4-year rated polyethylene film
ventilation_system: 60 CFM inflation blower
```

- **Price:** £8198.06 [^1]
- **Summary:** This 24 ft x 72 ft commercial hoop house has a galvanized steel frame, double-layer polyethylene roof film, and a 60 CFM inflation blower. It suits growers, nurseries, garden centers, and aquaculture operations needing a large year-round propagation or production structure.
- **Ideal For:** This product specifically suits the question because its 24 ft x 72 ft footprint provides 1,728 sq ft of growing space, making it one of the largest listed 1100 Series configurations.
- **Additional Sources:** [^2]

### Greenhouse Megastore Garden Grower Greenhouse Package HG-GGK-1836LP, 18 ft x 36 ft LP Heater
```yaml
product: greenhouse-megastore-garden-grower-greenhouse-package-hg-ggk-1836lp-18-ft-x-36-ft-lp-heater
brand: Greenhouse Megastore
price_gbp: 13715.63
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
heating_system: 1 Modine HD75 LP heater with single-stage thermostat
greenhouse_size: 18 ft x 36 ft
glazing_material: 6mm polycarbonate twin-wall covering
ventilation_system: 2 MegaBreeze 12in HAF fans
```

- **Price:** £13715.63 [^3]
- **Summary:** This 18 ft x 36 ft greenhouse package provides 648 sq ft of growing space with a steel frame and 6mm twin-wall polycarbonate covering. It includes an LP-fired Modine HD75 heater and two HAF fans, making it suitable for serious growers, farms, and year-round cultivation.
- **Ideal For:** This product suits shoppers seeking the largest greenhouses because its 18 ft x 36 ft footprint provides 648 sq ft of growing area, supported by a commercial-grade HD75 LP heater and two circulation fans.
- **Additional Sources:** [^4]

### Greenhouse Megastore Garden Grower Greenhouse Package HG-GGK-1836NG, 18 ft x 36 ft NG Heater
```yaml
product: greenhouse-megastore-garden-grower-greenhouse-package-hg-ggk-1836ng-18-ft-x-36-ft-ng-heater
brand: Greenhouse Megastore
price_gbp: 13715.63
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
heating_system: Natural gas heater
greenhouse_size: 18 ft x 36 ft
```

- **Price:** £13715.63 [^3]
- **Summary:** This 18 ft x 36 ft greenhouse package is a large, engineered growing structure with 6 ft frame centers and a natural gas heating system. It suits serious hobby growers, educational programs, and small-scale commercial growers needing substantial year-round growing space.
- **Ideal For:** It suits the search for the largest greenhouses available because its 18 ft x 36 ft footprint provides 648 sq ft of growing space, making it one of the largest Garden Grower package sizes.

### Greenhouse Megastore Senior Teaching Greenhouse Package CG-TP-SN, 24 ft x 48 ft
```yaml
product: greenhouse-megastore-senior-teaching-greenhouse-package-cg-tp-sn-24-ft-x-48-ft
brand: Greenhouse Megastore
price_gbp: 28591.65
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
heating_system: Modine PTP gas-fired unit heater with heating thermostat
greenhouse_size: 24 ft x 48 ft
glazing_material: 8mm Twinwall Polycarbonate Panels
ventilation_system: Two 30 in exhaust fans, three 36 in motorized inlet shutters, and two 12 in horizontal airflow fans
```

- **Price:** £28591.65 [^5]
- **Summary:** This 24 ft x 48 ft greenhouse has a galvanized steel frame and durable 8mm twinwall polycarbonate glazing. It includes ventilation, cooling controls, and a gas-fired heater, making it suitable for schools with large horticulture programs and space for 20-25 students.
- **Ideal For:** It suits the search for the largest greenhouses because its 1,152 sq ft footprint provides substantial growing space while its commercial-style ventilation, heating, and galvanized steel construction support year-round use.

---
## References & Sources
[^1]: Greenhouse Megastore, accessed 2026-09-13. https://www.greenhousemegastore.com/products/1100-series-hoop-house-package
[^2]: Mega Greenhouse Kit, accessed 2026-09-13. https://megagreenhousekit.com/product/1100-series-hoop-house-package/
[^3]: Greenhouse Megastore, accessed 2026-09-13. https://www.greenhousemegastore.com/products/garden-grower-package
[^4]: Mega Greenhouse Kit, accessed 2026-09-13. https://megagreenhousekit.com/product/garden-grower-package/
[^5]: Greenhouse Megastore, accessed 2026-09-13. https://www.greenhousemegastore.com/products/senior-teaching-package-greenhouse