Sleepout Site Plan NZ: Exemptions, Setbacks & Boundaries

A sleepout site plan in New Zealand shows where a proposed detached sleeping room, backyard cabin or studio will sit in relation to the legal property boundaries, existing house, other buildings, access, services, easements and site constraints.

Some sleepouts can be built without applying for building consent. However, the exemption depends on the sleepout’s size, height, construction method, distance from boundaries and residential buildings, intended use and internal facilities.

A consent exemption does not remove the need to comply with the New Zealand Building Code, district-plan rules, resource-consent requirements, title restrictions, stormwater obligations or other applicable laws.

What Is a Sleepout in New Zealand?

A sleepout is usually a small detached building used as additional sleeping accommodation, a guest room, teenage retreat, home office or hobby room associated with an existing dwelling.

For the ordinary detached-building exemptions, a sleepout is not a self-contained dwelling. It must rely on the main house for cooking, bathroom and sanitation facilities.

An exempt sleepout cannot contain:

• A kitchen or cooking facilities
• A toilet
• A shower or bath
• Other sanitary fittings or sanitary appliances
• Facilities for storing potable water

A sleepout used for sleeping must be associated with an existing dwelling whose cooking and sanitary facilities are readily available. Smoke alarms are also required when a sleepout between 10m² and 30m² contains sleeping accommodation.^[1][2]

Does a Sleepout Need Building Consent?

Not always. Schedule 1 of the Building Act provides several possible exemptions for detached, single-storey buildings.

The correct pathway depends mainly on:

• The net floor area
• The height and floor level
• The wall and roof materials
• Whether the sleepout is prefabricated or kitset
• Who designs and constructs it
• The distance from legal boundaries
• The distance from residential buildings
• Whether it contains cooking, plumbing or sanitary facilities

Sleepouts Up to 10 Square Metres

A detached sleepout no larger than 10m² can usually use the small detached-building exemption when it meets all prescribed conditions.

The building must:

• Be detached
• Have no more than one storey
• Have a floor level no more than 1 metre above the supporting ground
• Be no more than 3.5 metres above the floor level
• Have no more than 10m² of floor area
• Contain no sanitary facilities
• Contain no potable-water-storage facilities
• Contain no cooking facilities when used for sleeping
• Be associated with an existing dwelling when used as sleeping accommodation

The Building Act exemption no longer imposes the same one-metre boundary condition on this category. MBIE’s current example includes a nine-square-metre sleepout positioned on a property boundary.^[3]

Sleepouts Between 10 and 30 Square Metres

A sleepout larger than 10m² but no larger than 30m² can potentially use one of three main exemption pathways.

1. Lightweight construction pathway

The sleepout may qualify when:

• Its walls and roof use lightweight building products
• The timber or steel structure follows Acceptable Solution B1/AS1
• It satisfies the floor-level and height limits
• It contains no kitchen, bathroom or potable-water storage
• It is at least 1 metre from legal boundaries and residential buildings
• A smoke alarm is installed when used for sleeping

This pathway is intended for conventional lightweight construction rather than heavy masonry, concrete-panel or other non-lightweight systems.^[1]

2. Prefabricated or kitset pathway

A prefabricated or kitset sleepout may qualify when:

• The manufacturer or supplier has had the design completed or reviewed by a Chartered Professional Engineer
• The building is erected in accordance with that approved design
• Its floor area is more than 10m² but no more than 30m²
• It meets the height and floor-level limits
• It contains no cooking or sanitary facilities
• It remains at least 1 metre from legal boundaries and residential buildings

An imported or locally supplied kitset does not automatically qualify. The owner should obtain written confirmation that the engineering and exemption conditions have been satisfied.^[4]

3. Licensed Building Practitioner pathway

A sleepout may also qualify when its design and construction are carried out or supervised by appropriately licensed building professionals.

This pathway can accommodate a broader range of construction materials, but it still requires:

• A floor area of more than 10m² but no more than 30m²
• A floor level no more than 1 metre above the supporting ground
• A height no more than 3.5 metres above the floor level
• No kitchen, bathroom or potable-water-storage facilities
• At least 1 metre from legal boundaries and residential buildings
• A smoke alarm when used as sleeping accommodation

The design work is best completed by an LBP holding the appropriate Design licence or by a Registered Architect. The relevant construction work must also be completed or supervised by suitably licensed practitioners.^[2]

The One-Metre Building Act Setback

For sleepouts between 10m² and 30m², the applicable exemptions do not cover a building that is closer than 1 metre to:

• Any legal property boundary
• Any residential building

The site plan should therefore show the shortest distance between the complete sleepout and:

• The front boundary
• The rear boundary
• Both side boundaries
• The existing house
• Any other residential building

The one-metre distance is an exemption condition rather than a universal planning setback. Your council’s district or unitary plan may require a greater yard.

Legal Boundary Versus Fence Line

The one-metre measurement must be based on the legal property boundary.

A fence, hedge, retaining wall, driveway edge or lawn boundary may not match the legal title line. A fence can be:

• Entirely inside one property
• Shared along the legal boundary
• Offset from the boundary
• Built within an easement
• Incorrectly positioned

Use reliable information such as:

• An existing cadastral survey
• Located boundary pegs
• A deposited plan
• A record of title
• A survey completed by a licensed cadastral surveyor

Online council maps and aerial photographs are useful for preliminary planning, but they should not be treated as certified legal-boundary information.

Read Site Plan Requirements Near Boundaries in New Zealand for more guidance.

District-Plan Setbacks Still Apply

Building-consent exemptions and planning rules are separate.

Before building, check the relevant district or unitary plan for:

• Front, side and rear yards
• Height-in-relation-to-boundary controls
• Maximum building height
• Building or site coverage
• Maximum impervious area
• Minimum landscaped or permeable area
• Outdoor-living-space requirements
• Special-character or heritage overlays
• Flood, coastal, slope or ecological overlays

MBIE specifically advises owners to check district and regional planning requirements before beginning an exempt detached-building project. A resource consent may still be required even though a building consent is not.^[5]

Height in Relation to Boundary

Height-in-relation-to-boundary rules—sometimes called recession planes—control the height and bulk of buildings near neighbouring properties.

A sleepout can satisfy the horizontal yard setback and still breach the daylight plane because of:

• Its roof height
• The roof pitch
• A raised floor
• Sloping ground
• The orientation of the relevant boundary
• The council’s applicable recession-plane angle

Where the sleepout is near a boundary, the permit or planning drawings may need to include:

• Existing ground levels
• Finished floor level
• Wall height
• Roof ridge or highest-point level
• The applicable boundary recession plane
• A section through the sleepout and boundary

There is no single national recession-plane angle for every residential property. Check the rules applying to the site’s zone and council.

When a Sleepout Definitely Needs Building Consent

A building consent will generally be needed when the proposed sleepout:

• Exceeds 30m²
• Has more than one storey
• Has a floor level more than 1 metre above the supporting ground
• Exceeds the permitted height conditions
• Contains a toilet, shower, bath or other sanitary facilities
• Contains cooking facilities
• Contains facilities for storing potable water
• Is not associated with a dwelling but is intended for sleeping
• Does not follow one of the valid 10m²-to-30m² design and construction pathways
• Is closer than 1 metre to a boundary or residential building when relying on a 10m²-to-30m² exemption

A building consent may also be the safer route when the exemption classification is uncertain or the design involves unusual materials, difficult ground conditions or nonstandard structural work.

Sleepout Versus Granny Flat

Adding a kitchenette or bathroom to an exempt sleepout later can turn it into unauthorised building work. Obtain the necessary consent and professional advice before changing its use or facilities.

For the self-contained dwelling pathway, read Granny Flat Site Plan in New Zealand: 2026 Exemption, PIM, Setbacks and Services.

What Should a Sleepout Site Plan Show?

1. Property Address and Legal Description

Identify the property accurately using:

• The full street address
• Lot number
• Deposited-plan number
• Record-of-title reference where available
• Relevant proposed lot information if subdivision is underway

This avoids confusion where neighbouring lots, cross-lease areas or shared accessways have similar street addresses.

2. Legal Property Boundaries

Show the full legal property outline and label:

• The front boundary
• The rear boundary
• Both side boundaries
• Boundary lengths
• Road frontage
• Shared access legs
• Irregular or angled boundaries

The property outline should be based on reliable title, survey or deposited-plan information rather than an approximate fence position.

3. Existing House and Other Buildings

Show the existing house because an exempt sleepout containing sleeping accommodation must be used in connection with a dwelling.

Also show:

• Existing garages
• Carports
• Sheds
• Other sleepouts
• Minor dwellings
• Decks and verandahs
• Swimming pools
• Retaining walls

These structures affect building separation, site coverage, access, fire design and the practical location of the proposed sleepout.

4. Proposed Sleepout Dimensions

The proposed sleepout should be clearly distinguished from existing buildings.

Show:

• Overall outside length
• Overall outside width
• Net floor area
• Roof overhangs
• Entry steps, decks or landings
• Maximum height
• Finished floor level
• Existing ground level

The applicable exemption uses net floor area. If an existing detached building is being extended, the combined total floor area must remain within the exemption limit.

5. Boundary Setback Dimensions

Write every relevant setback directly on the drawing.

Dimension the shortest distance from the proposed building to:

• The front legal boundary
• The rear legal boundary
• The left legal boundary
• The right legal boundary
• A shared right of way
• Any district-plan building line

Do not require the council, designer or contractor to estimate the distance from the drawing scale.

6. Separation From Residential Buildings

For sleepouts between 10m² and 30m², show the shortest distance to every residential building.

This commonly includes:

• The existing main house
• An existing minor dwelling
• Another sleepout used for accommodation
• Any neighbouring residential building where its location is relevant

A proposed 28m² sleepout more than 1 metre from all boundaries and the associated house is specifically identified by MBIE as an example that may qualify under the LBP exemption when the remaining conditions are satisfied.^[2]

7. Site Coverage and Impervious Area

A sleepout may increase both building coverage and impervious area.

Depending on the district-plan definitions, the calculation may include:

• The existing house
• The proposed sleepout
• Garages and carports
• Sheds and other accessory buildings
• Covered patios or decks where counted
• Other roofed structures

Impervious-area calculations may also include:

• Roofs
• Driveways
• Concrete paths
• Paver areas
• Patios
• Parking spaces

Check the specific council rules because the definitions and maximum percentages vary across New Zealand.

8. Access Path and Safety

The site plan should show how occupants will move between the main house and sleepout.

Include:

• The main pedestrian path
• Steps and ramps
• Gate locations and widths
• Outdoor lighting where relevant
• Changes in ground level
• Access around the building for maintenance

The path should provide practical access to the main dwelling’s bathroom and cooking facilities, particularly where the sleepout is used overnight.

9. Smoke Alarms and Escape

A sleepout between 10m² and 30m² that includes sleeping accommodation must have smoke alarms installed.

The floor plan and elevations should also consider:

• Sleeping-room smoke-alarm placement
• Safe exit through the entrance door
• Openable windows where used as an escape route
• Clear access away from the building
• Exterior lighting

A site plan alone does not demonstrate all Building Code fire-safety requirements, but it should show the entrance and surrounding access clearly.

10. Stormwater Disposal

Building-consent-exempt work must still dispose of roofwater appropriately.

The site plan may show:

• Roof downpipes
• Stormwater drain routes
• Connection to an approved public system
• A soak pit
• A rainwater tank
• Swales or surface-flow paths
• Discharge direction
• Drainage easements

Roofwater should not create dampness around the sleepout, overload an unsuitable system or cause a nuisance on neighbouring property.

MBIE advises owners to consider stormwater disposal before beginning a detached-building project.^[5]

11. Electricity

An exempt sleepout can contain electrical lighting and power when the electrical work is completed lawfully by an authorised person.

Where relevant, show:

• The existing switchboard
• The proposed power route
• Overhead electricity lines
• Underground conduit
• Meter boxes or utility cabinets
• Separation from other services

Electrical work does not convert a sleepout into a dwelling, but adding plumbing, cooking or self-contained facilities can change its classification.

12. Easements and Rights of Way

A sleepout can meet the normal boundary setback and still conflict with a legal restriction.

Show known:

• Utility easements
• Drainage easements
• Rights of way
• Shared driveways
• Access easements
• Building-line restrictions
• Consent notices
• Land covenants

An exemption under the Building Act does not cancel the rights of an easement holder or remove restrictions registered against the title.

13. Cross-Lease Properties

Sleepout projects on cross-lease properties can require additional care.

The owner should check:

• Whether the sleepout lies within an exclusive-use area
• Whether the lease requires consent from other owners
• Whether the new structure changes the flats plan
• Whether common access or service areas are affected
• Whether title documentation needs to be updated

A building-consent exemption does not automatically remove private cross-lease obligations.

14. Natural Hazards and Ground Conditions

A sleepout should not be positioned without considering:

• Flooding
• Overland flow
• Coastal inundation
• Erosion
• Unstable or steep ground
• Subsidence
• Liquefaction
• Falling debris
• Filled ground

Where relevant, show:

• Contours or spot levels
• Flood or flow-path boundaries
• Streams and drains
• Slopes
• Retaining walls
• Proposed cut and fill
• Finished floor level

An exemption does not reduce the obligation to build safely and comply with the Building Code. Specialist geotechnical, drainage or structural advice may still be necessary.

15. Trees and Landscaping

Show significant trees when they affect:

• The sleepout footprint
• Foundation excavation
• Construction access
• Stormwater disposal
• Protected vegetation rules
• Neighbouring-property amenity

A foundation can damage important roots even when the building does not overlap the tree trunk.

Building Code Compliance Still Applies

Exempt building work must still comply with the New Zealand Building Code.

Depending on the design, relevant matters can include:

• Structural stability
• Durability
• Fire safety
• Access and escape
• Moisture protection
• Ventilation
• Natural light
• Energy efficiency
• Safe glazing
• Electrical safety

Council approval is not the only measure of lawful construction. The owner remains responsible for ensuring that exempt work satisfies the Building Act and Building Code.

Do You Need to Notify the Council?

The ordinary detached-building exemptions do not use the mandatory PIM and completion-notification system created for qualifying 2026 granny flats.

However, owners may choose to:

• Ask the council to confirm the planning rules
• Apply for a discretionary exemption decision under section 42A where appropriate
• Keep design and construction records
• Request that exempt work information be added to the property file if the council offers that service
• Obtain a Certificate of Acceptance later if applicable and legally available

Keep copies of:

• The site plan
• Floor plans and elevations
• Engineering or LBP documentation
• Kitset-manufacturer instructions
• Material specifications
• Photographs taken during construction
• Electrical certificates
• Resource-consent or planning correspondence

Good records can help with future property sales, insurance, alterations and questions about when or how the sleepout was built.

Common Sleepout Site Plan Mistakes

Calling a self-contained flat a sleepout

A building with its own kitchen or bathroom does not qualify under the ordinary sleepout exemptions.

Using a fence as the legal boundary

The fence may be offset from the title boundary. Use reliable survey or title information.

Assuming one metre is the universal setback

One metre is an exemption condition for many 10m²-to-30m² buildings. District-plan yards may be larger.

Applying the one-metre rule to every building under 10m²

The current small-building exemption does not contain the same statutory distance condition, although planning and fire rules still apply.

Leaving the main house off the plan

A sleepout used for accommodation must be associated with a dwelling and rely on its cooking and sanitary facilities.

Failing to show building separation

Sleepouts between 10m² and 30m² must generally be at least 1 metre from residential buildings to use the exemption.

Using the gross outside area without confirming net floor area

The exemptions refer to floor area. Confirm the correct measurement method before relying on a size threshold.

Adding a loft

A loft or elevated floor can cause the building to exceed the permitted floor-level or single-storey conditions.

Ignoring height-in-relation-to-boundary rules

A sleepout can comply with the horizontal setback but still breach the applicable recession plane.

Leaving stormwater unexplained

Roofwater must be disposed of without creating dampness, erosion or nuisance on another property.

Building over an easement

Building-consent exemption does not authorise interference with utilities or private legal rights.

Using an unverified overseas kitset

The kitset pathway requires the specified Chartered Professional Engineer design or review and compliance with the approved design.

Using the wrong professional pathway

The LBP exemption requires licensed supervision of the relevant design and construction work.

Assuming exempt means unregulated

The Building Code, district plan, easements, hazards and other legal obligations continue to apply.

For more examples, read Why Site Plans Get Rejected in New Zealand—and How to Fix Them.

Information to Gather Before Ordering a Sleepout Site Plan

• Property address
• Record of title
• Lot and deposited-plan information
• Existing survey or site plan
• Legal-boundary dimensions
• Dimensions and location of the existing house
• Proposed sleepout length and width
• Proposed net floor area
• Maximum height and floor level
• Distances to every legal boundary
• Distance to the existing house and other residential buildings
• Existing garages, sheds, decks and structures
• Driveway, paths, fences and gate locations
• Known easements, covenants and consent notices
• Proposed stormwater-disposal method
• Existing ground levels or contours where relevant
• Tree and landscaping information
• Kitset, engineering or LBP documents
• Photographs of the property
• Any council or planning correspondence

Order a Sleepout Site Plan in New Zealand

NZ Site Plan can prepare a clear, easy-to-read property drawing showing the existing house, proposed sleepout, legal boundaries, boundary setbacks, building separation, access path, driveway, fences, gates, known easements and other relevant site features.

The plan can be prepared using an existing survey, record-of-title information, council mapping, building dimensions, photographs and project sketches supplied by the owner, designer or builder.

Where the project requires a cadastral survey, structural engineering, geotechnical advice, drainage design, resource-consent planning or another licensed professional service, those documents must be obtained separately.

Frequently Asked Questions

Can I build a sleepout without building consent?

Yes, when it meets all conditions of an applicable Schedule 1 exemption. The main pathways cover detached buildings up to 10m² and certain buildings between 10m² and 30m².

How large can an exempt sleepout be?

The ordinary detached-building exemptions can cover a sleepout up to 30m². Different professional and construction conditions apply once it exceeds 10m².

Can an exempt sleepout have a bathroom?

No. A sleepout containing sanitary facilities does not qualify under these ordinary detached-building exemptions.

Can it have a kitchenette?

No. A sleepout used for sleeping cannot contain cooking facilities under these exemptions.

Can a sleepout have electricity?

Yes. Electrical work must be completed lawfully by an authorised electrical worker, and appropriate certificates should be retained.

How close can a 20m² sleepout be to a boundary?

It must generally be at least 1 metre from every legal boundary to use the applicable 10m²-to-30m² exemption. A district plan may require a greater setback.

Can a 9m² sleepout be closer than one metre?

The current exemption for buildings up to 10m² does not contain the same statutory one-metre distance condition. Planning rules, easements, fire requirements and other restrictions still need to be checked.

How far must the sleepout be from the house?

A sleepout between 10m² and 30m² must generally remain at least 1 metre from any residential building to use the relevant exemption. Other Building Code or planning requirements may require more.

Does it need a smoke alarm?

Yes, when a 10m²-to-30m² exempt building contains sleeping accommodation. Smoke-alarm requirements should also be assessed for any other sleepout used overnight.

Can I build it myself?

A small sleepout up to 10m² may be owner-built when all exemption and Building Code conditions are satisfied. For larger sleepouts, the chosen exemption pathway may require lightweight B1/AS1 construction, an engineer-reviewed kitset or Licensed Building Practitioner supervision.

Does building-consent exemption mean I do not need resource consent?

No. Building and resource-consent requirements are separate. District-plan setbacks, coverage, recession planes and overlay rules still apply.

Can I convert an exempt sleepout into a granny flat later?

Not without first checking the appropriate consent pathway. Adding a kitchen, toilet, shower or other self-contained facilities changes the project and will usually require building approval.

Do I need a boundary survey?

Not automatically, but a licensed cadastral survey may be necessary when the boundary cannot be established reliably or the sleepout will be close to the minimum permitted distance.

Can NZ Site Plan provide structural engineering?

The service described here is the site plan. Structural engineering, licensed design, cadastral surveying, geotechnical work, drainage design and resource-consent documents must be obtained separately when required.