This is general guidance based on standard permitted development rights in England. Rules differ for listed buildings, conservation areas, and properties with Article 4 directions. Always confirm with your local planning authority before starting work.
Do I Need Planning Permission for a Greenhouse in Stevenage?
A glazed garden structure for growing plants. Greenhouses follow the same permitted development rules as other garden outbuildings.
Planning in Stevenage
96%
of planning applications granted
90%
decided within the statutory or agreed time
81%
of householder applications decided within 8 weeks
In the four quarters to 2026 Q1, Stevenage decided 253 planning applications. 133 of these were householder projects such as extensions, loft conversions and outbuildings, of which 96% were granted.
Planning statistics: MHCLG planning application statistics, the four quarters to 2026 Q1. Conservation area and Article 4 data: planning.data.gov.uk, © Historic England / Crown copyright. Open Government Licence v3.0.
Important: Additional Restrictions May Apply in Stevenage
Stevenage has 7 conservation areas. These include Broadwater Conservation Area, Old Town High Street Conservation Area, Orchard Road Conservation Area, Shephall Green Conservation Area, St. Nicholas / Rectory Lane Conservation Area, Symonds Green Conservation Area. If your property is in a conservation area, some or all permitted development rights may be restricted. For example, you may need planning permission for changes that would normally be permitted, including alterations to the roof, cladding, or extensions visible from a public highway.
Stevenage has 126 recorded Article 4 directions. These include Balbir House VISHKARMA PARK Norton Green Road Stevenage; CAXTON POINT Caxton Way Stevenage; Redemption House Gunnels Wood Park; Solutions House Crompton Road Stevenage. Article 4 directions remove specific permitted development rights in defined areas. If your property is covered by an Article 4 direction, you may need planning permission for work that would normally be permitted. Contact Stevenage planning department to check whether an Article 4 direction applies to your property.
Check with Stevenage planning department before starting work to confirm whether your property is affected by any special designations.
Permitted Development Rules for a Greenhouse
Generally permitted under Part 1, Class E as an outbuilding for purposes incidental to the enjoyment of the dwelling. The same height and area rules apply as for sheds and other outbuildings.
Conditions
- 1Must be for purposes incidental to the enjoyment of the dwelling
- 2Must not be forward of the principal elevation
- 3Same height limits as outbuildings (2.5m within 2m of boundary; 4m/3m elsewhere)
- 4Must not cover more than half the curtilage
Size and Dimension Limits
- Height within 2m of boundary: 2.5m maximum
- Height elsewhere: 4m (dual pitch) or 3m (other roofs)
- Total outbuilding area must not exceed 50% of curtilage
When Permitted Development Does Not Apply
- Designated area restrictions apply
- Must not be used for commercial growing or retail
- Large greenhouses may attract neighbour complaints about overshadowing or visual impact
What About Building Regulations?
Building regulations approval is not usually required
Greenhouses are normally exempt from Building Regulations as single-storey outbuildings under 30 square metres with no sleeping accommodation. Any electrical installation must comply with Part P.
Building regulations are separate from planning permission. Even if your project is permitted development, you may still need building regulations approval. Contact Stevenage building control or use an approved inspector.
How to Apply in Stevenage
If you need planning permission for your greenhouse, you can apply through Stevenage's planning department or via the national Planning Portal.
If your project is permitted development and you want written confirmation, you can apply for a Lawful Development Certificate (LDC) from Stevenage. This provides proof that your project does not need planning permission, which can be helpful when selling your property.
What Happens If I Build Without Permission?
Very low risk for domestic greenhouses within PD limits. Enforcement is rare unless the greenhouse is unusually large or used for commercial purposes.
Frequently Asked Questions
Do I need planning permission for a greenhouse in Stevenage?
Does a greenhouse in Stevenage need building regulations?
How do I apply for planning permission in Stevenage?
How long does planning permission take in Stevenage?
What percentage of planning applications does Stevenage approve?
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