ALPS

From one address,review early-stage buildability and regulatory risk.

Before design begins — parcel, zoning, statute and ordinance read together into limits, preliminary scale and key risks.

See what it covers →

Built from actual statute and ordinance text

Permitted uses
153/ 228곳

Local governments with use-restriction ordinances loaded

Coverage & FAR
152/ 228곳

Local governments with density limit ordinances loaded

Parking
161/ 228곳

Local governments with parking ratio ordinances loaded

Design review
131/ 228곳

Local governments with building committee thresholds loaded

The denominator is the number of basic local governments nationwide. Coverage differs by regulatory axis, so each is shown separately; areas not yet loaded are reported as needing review. · Most recent ordinance amendment reflected: 2026-06-02

How it works

  1. 01Resolve the site from an address

    The address becomes a parcel: area, land category, zoning, boundary and existing buildings. Enter several parcels and individual lots are kept distinct from the combined boundary.

  2. 02Find the applicable standards in statute and local ordinance

    The Building Act, related statutes and the governing municipal ordinance are read together — permitted uses, coverage and floor-area ratio, parking, north daylight, and which reviews or assessments apply.

  3. 03Report results with their basis

    Planned values sit next to legal limits, each marked compliant · non-compliant · not applicable · needs confirmation · needs review, with the statute or ordinance article that decided it.

What you get

01

Site and context

Zoning and districts, existing buildings, comparable buildings and permit records nearby.

02

Code and approvals

Per-item compliance with the deciding article, plus which reviews and assessments apply.

03

Scale, layout and 3D massing

Buildable envelope and preliminary scale, floor schedule, 2D layout and terrain-aware 3D massing.

04

Preliminary feasibility and schedule

Rough cost and revenue by delivery route, and a schedule built from the applicable approvals.

Not just numbers

Planned value, statutory limit, verdict and basis — compared on one screen.

Output sampleFormat example — not an actual site review

ItemPlannedLimit VerdictBasis
Building coverage 59.4 % 60 % Compliant Statute
Floor-area ratio 197.2 % 200 % Compliant Ordinance
North daylight 2.8 m 3.0 m Non-compliant Building Act
Public open space — Unknown Needs confirmation Ordinance

We do not pretend to know what we have not verified

Built by a practising architect for their own project reviews. Knowing where a review goes wrong is why nothing unverified is ever marked compliant.

No figure without source text
Statutory values come from the National Law Information Center source text; ordinance values come from the governing municipal ordinance. Values not yet loaded or not yet verified are left empty rather than filled in.
What cannot be judged is never marked compliant
Where the standard itself is unconfirmed, or further material is required, the item is marked needs confirmation or needs review.
Broken premises come before results
When parcels fall under different jurisdictions or are not contiguous, ALPS reports that first — ahead of any calculated result.

Public data, normalised into reviewable standards

Statute and ordinance source text is collected in advance and normalised into rules a review can act on. The live review server queries those prepared standards to produce results.

Parcels and spatial data from VWorld and KLIS; statutes and ordinances from the Ministry of Government Legislation; buildings, permits and transaction records from Ministry of Land, Infrastructure and Transport open data.

ALPS Housing — a separate service

Home purchase budget, loan limits and trade-up assessments are a different kind of question from building code review, so they are offered separately.

Have an address to review?

Give an address and an intended use, and the review runs from site conditions through applicable code to possible scale and the main risks — in one flow.

Open ALPS in ChatGPT

A ChatGPT account is required. A review starts by giving an address in the chat.

Scope and limits

ALPS is a review tool that supports early judgement and decisions before design begins. District unit plan guidelines, special planning districts, individual design-review conditions, administrative interpretations and site conditions can override general code standards. Final design and permitting decisions require confirmation from the competent authority and qualified professionals.