Cost, time, and risk -
before you lodge.

Enter the address and ARRO forecasts what the consent will actually cost, how long it will really take once RFI risk is priced in, where it is most likely to run into trouble, and - from the site's zone and hazard overlays - exactly what documentation the council will require. The surprises happen on screen, not at the council desk.

01 · Cost

Price the consent before you commit

ARRO estimates the full cost of the consent from real council fee schedules and MBIE levies - council processing fees, the building levy, and development contributions - itemised so you can see where the money goes, not just a lump sum.

  • Itemised breakdown of the full consent cost, not a single number
  • Council processing fees and MBIE building levy
  • Development contributions where they apply
02 · Timeline

P50 and P90, not a guess

The statutory 20-working-day clock is only the start. ARRO models the real elapsed time - including the probability an RFI suspends the clock and how long that typically adds - and returns a P50 and P90 in calendar weeks, through to CCC.

  • P50 / P90 in calendar weeks, lodgement to sign-off
  • RFI probability and expected suspension built in
  • Statutory processing clock plus real elapsed time
Consent durationLodgement → CCC
P50clean run9 weeks
P90one RFI round15 weeks
Statutory clockRFI suspensionCCCRFI risk 58%
03 · Risk

Where this consent is likely to bite

Every forecast carries a graded risk profile - consent complexity, cost overrun, timeline, and site risk - each with the factors driving it and the mitigations that pull it back down, so you can act before you lodge.

  • Consent complexity, cost, timeline, and site risk graded
  • Concrete mitigations attached to every risk
  • The factors behind each score, made explicit
04 · Canterbury, site-aware

Your Canterbury site's documentation, mapped from the GIS

Enter a Greater Christchurch address and ARRO queries the Canterbury councils' live GIS for the planning zone and the hazard overlays that actually intersect your site - flood, liquefaction, slope, coastal, tsunami, heritage - then lists the documents each one triggers, from the RMA Schedule 4 baseline up.

  • Required documents listed with the overlay that triggered each
  • Planning zone and hazard overlays resolved at the exact address
  • Flood, liquefaction, slope, coastal, tsunami, and heritage layers checked
  • Live across Greater Christchurch - Christchurch City, Selwyn, Waimakariri
Greater Christchurch · site overlaysGCSP · NZTM2000
Flood
Tsunami
Liquefaction
Coastal
Slope
FloodTsunamiLiquefactionCoastalSlope
At the pinned site General residential zone (GRZ), intersecting Liquefaction Cat 1 and Coastal inundation → documents mapped.
0.0%
of Christchurch consent applications drew at least one RFI
9,960 applications processed
0.0%
of consents nationwide drew at least one RFI
143,022 applications processed
0 days
median time to answer an RFI, nationwide
ARRO drafts replies in minutes
0 BCAs
mapped at launch, with Wellington-region councils next
Christchurch · Selwyn · Waimakariri
Source: MBIE Annual Building Consent System Performance Monitoring, year ended June 2025.
Common questions

Questions we get asked

How is the P50/P90 timeline calculated?

ARRO models the real elapsed time to consent, not just the statutory 20-working-day clock - it prices in the probability an RFI suspends the clock and how long that typically adds, and returns a P50 and P90 in calendar weeks, through to CCC.

What's included in the cost estimate?

An itemised breakdown from real council fee schedules and MBIE levies - council processing fees, the building levy, and development contributions where they apply - not a single lump-sum guess.

Which areas does site-aware forecasting cover?

Greater Christchurch - Christchurch City, Selwyn, and Waimakariri. Enter an address and ARRO queries the councils' live GIS for the planning zone and hazard overlays (flood, liquefaction, slope, coastal, tsunami, heritage) that intersect the site, and lists the documents each one triggers.

What does the risk profile actually grade?

Consent complexity, cost overrun, timeline, and site risk - each with the factors driving the score and concrete mitigations attached, so you can act on it before you lodge rather than after.

Now onboarding early teams

See the consent before you file it.

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Forecasting | ARRO